{ "$schema_version": "5.3", "review_mode": "fresh", "claim_restatement": { "index_wording": "Regular sauna use causally reduces cardiovascular clinical events in adults.", "entry_form": "claim", "gradeable_restatement": "Regular sauna use causally reduces cardiovascular clinical events in adults.", "restatement_required": true, "split_into": [], "parent_claim": null, "scope_qualifiers": [ { "qualifier": "Baseline disease and risk, thermal modality, measured temperature/duration/frequency, concurrent exercise and prespecified clinical event follow-up", "determinable_before_outcome": true, "determined_from": "Enrollment and experimental design, before results; no responder-defined scope.", "action": "retained" } ] }, "hypothesis": { "name": "Sauna and Cardiovascular Prevention", "central_claim": "Regular sauna use causally reduces cardiovascular clinical events in adults.", "proposed_mechanism": "Regular sauna use causally reduces cardiovascular clinical events in adults.", "claimed_scope": "Adults with baseline health measured; regular sauna exposure preceding hard cardiovascular events; thermal modality, cointervention and disease setting retained", "claimed_level": [ "response", "progression" ], "is_conjunctive": false, "conjunctive_note": "The precise lead clinical proposition is SC2. Mechanism, competing-cause, generalization and safety companions remain separately reported; they do not replace the primary clinical endpoint." }, "rubric_routing": { "primary_rubric": "06-metabolism-aging.md", "secondary_rubrics": [ "07-psychiatry-neuromodulation.md" ], "index_notes_applied": [ "The precise lead clinical proposition is SC2. Mechanism, competing-cause, generalization and safety companions remain separately reported; they do not replace the primary clinical endpoint." ], "rubric_fit_note": "No dedicated cardiovascular-prevention rubric ships in frozen v5.3. Rubric06 is adapted explicitly to a positive controlled hard cardiovascular event/trajectory endpoint for SC2; lifespan/healthspan language and universal caps remain unchanged. SC1 intermediate responses are reported as verified physiology rather than treated as event mediation. Cold recovery and medical neuromodulation have separate endpoints; rubric07 is additionally routed to SC5 for active-sham, expectancy, blinding and device-specific inference, with objective AF burden distinguished from subjective wellness. SC4, SC5, the Rank 2 rival and the rubric07 routing concern cold-water immersion, cold showers and vagus-nerve devices, which are outside the registered sauna claim; they are retained as out-of-scope companions and are not evidence for or against it." }, "subclaim_matrix": { "subclaims": [ { "id": "SC1", "statement": "Sauna-induced physiological changes mediate a reduction in cardiovascular events.", "subclaim_type": "mechanism", "scope": "Measured temperature, duration, frequency and baseline disease", "claimed_scope": "Measured temperature, duration, frequency and baseline disease", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Controlled heat-exposure physiology", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Controlled human heat studies establish real physiological responses. Their Γ assignment here concerns the prevention-mechanism inference: blood pressure, flow, thermal acclimation and other intermediate changes are not proof of fewer hard cardiovascular events. Positive walking/function studies retain their specific clinical context; the physiological phenomenon itself is not denied.", "rubric_adaptation": "Document controlled physiological target effects; the unchanged biomarker cap governs transfer to clinical-event prevention, not the existence of thermal hemodynamic responses." }, { "id": "SC2", "statement": "Sauna reduces cardiovascular clinical events.", "subclaim_type": "sufficiency", "scope": "Adults with baseline health measured; sauna exposure before hard clinical endpoints", "claimed_scope": "Adults with baseline health measured; sauna exposure before hard clinical endpoints", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Randomized or independently valid natural-experiment event evidence", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "The Finnish event cohorts show persuasive prospective inverse associations, and a matched 129-patient severe-heart-failure Waon cohort reports fewer five-year HF/cardiac-death composite events. Neither source establishes random allocation or an independent causal instrument; supervised adjunct therapy is also distinct from habitual sauna primary prevention. Randomized thermal trials address short-term risk factors, ectopy or function with meaningful positive and null results. No independently valid same-scope sauna hard-event causal experiment was verified; Γ captures mechanism/partial intervention support.", "rubric_adaptation": "A hard cardiovascular event or clinically meaningful disease trajectory is the clinical healthspan analogue. Valid natural experiments and independent exposure/withdrawal instruments can qualify; an RCT is not the only route." }, { "id": "SC3", "statement": "Observed sauna longevity benefits are independent of fitness and social-health confounding.", "subclaim_type": "mechanism", "scope": "Baseline activity, socioeconomic status, alcohol and health retained", "claimed_scope": "Baseline activity, socioeconomic status, alcohol and health retained", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Independent instruments and confounder-specific comparisons", "hsef_level": "Β", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Measured fitness and socioeconomic adjustment reduce selected explanations but do not eliminate unmeasured healthy-user, prior-disease, social and exposure-selection effects. A joint-association analysis of overlapping participants is not an independent instrument; confounding independence remains unestablished at Β.", "rubric_adaptation": "Fitness/social adjustment is a measured-confounding check, not random exposure allocation or an independent causal instrument." }, { "id": "SC4", "statement": "Cold immersion produces durable health benefits comparable to sauna.", "subclaim_type": "generalization", "scope": "Exact cold exposure and baseline health; physical function and clinical benefit distinguished", "claimed_scope": "Exact cold exposure and baseline health; physical function and clinical benefit distinguished", "governing_rubric": "06-metabolism-aging.md", "key_evidence_anchor": "Controlled cold-exposure clinical outcomes", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Out-of-scope companion; not evidence for or against the registered sauna claim. Cold has specific acute performance/symptom results and an unblinded self-reported sickness-absence positive, alongside training-adaptation harm and placebo-null findings. None establishes durable cardiovascular or overall health benefit comparable with sauna. Γ retains partial intervention support without extrapolating absence from nonsignificance.", "rubric_adaptation": "Durable health, acute symptom recovery and adaptation outcomes are distinct; cold exposure must be evaluated by its own modality and comparator." }, { "id": "SC5", "statement": "Consumer vagus-nerve devices reproduce established medical stimulation benefits.", "subclaim_type": "generalization", "scope": "Device, stimulation parameters, indication and credible sham fixed", "claimed_scope": "Device, stimulation parameters, indication and credible sham fixed", "governing_rubric": "07-psychiatry-neuromodulation.md", "key_evidence_anchor": "Device-specific controlled clinical trials", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Out-of-scope companion; not evidence for or against the registered sauna claim. Defined noninvasive devices can have genuine clinical effects, including home Parasym stimulation with objective AF-burden benefit. That disproves a blanket claim that auricular devices have no controlled evidence. Yet exact product, site, current, indication and comparator cannot be transferred across all consumer products or equated with implanted medical stimulation; the broad equivalence inference remains Γ.", "rubric_adaptation": "Use objective disease-specific outcomes and credible sensory-matched sham to assess named noninvasive devices. Universal consumer-to-implanted equivalence requires direct matched product/indication evidence; biomarker correlation does not establish vagal mediation." } ], "aggregation_rule": "primary-subclaim", "aggregation_preregistered": true, "aggregation_rationale": "The precise lead clinical proposition is SC2. Mechanism, competing-cause, generalization and safety companions remain separately reported; they do not replace the primary clinical endpoint.", "primary_subclaim_id": "SC2", "aggregation_derivation": "Primary-subclaim aggregation returns SC2 Γ: prospective mortality associations and meaningful controlled physiology/function supply a coherent biological rationale, while same-scope hard-event causal identification remains unverified. This is unconfirmed prevention, not evidence that sauna is physiologically inert or that every heat, cold or neuromodulation intervention is ineffective.", "aggregation_alternatives": { "weakest_link_would_return": "Β", "primary_subclaim_would_return": "Γ", "scope_matched_would_return": "Γ", "note": "Separate narrow successes do not replace the preregistered full-scope gate." }, "index_rule_deviation": "" }, "competing_models": { "models_evaluated": [ { "rank_in_tournament": 1, "model_id": "M3", "is_nominal": false, "name": "Controlled physiological and restricted functional benefit", "core_claim": "Repeated or acute heat improves selected physiological or functional outcomes in defined settings while hard-event prevention remains unconfirmed.", "explains_what_nominal_does_not": "Repeated or acute heat improves selected physiological or functional outcomes in defined settings while hard-event prevention remains unconfirmed.", "strongest_supporting_evidence": [ "Exercise-plus-sauna35785965 has a genuine BP/estimated-fitness positive and acute CKD42113470 improves measured walking; Waon27001189 has selected secondary function positives." ], "strongest_contradictory_evidence": [ "The WAON primary BNP contrast is null, the CAD37650138 vascular/BP trial is null and modalities/cointerventions differ; this is not general event prevention." ], "hsef_level_for_this_model": "Ε", "rationale": "Exercise-plus-sauna35785965 has a genuine BP/estimated-fitness positive and acute CKD42113470 improves measured walking; Waon27001189 has selected secondary function positives. The WAON primary BNP contrast is null, the CAD37650138 vascular/BP trial is null and modalities/cointerventions differ; this is not general event prevention." }, { "rank_in_tournament": 2, "model_id": "M4", "is_nominal": false, "name": "Cold and vagal interventions have separate mechanisms and indications", "core_claim": "Exact interventions can help some outcomes and fail or hinder others without being interchangeable with sauna.", "explains_what_nominal_does_not": "Exact interventions can help some outcomes and fail or hinder others without being interchangeable with sauna.", "strongest_supporting_evidence": [ "TREAT-AF32192678 shows a named home-device objective arrhythmia benefit; cold25121612 helps selected acute submaximal work." ], "strongest_contradictory_evidence": [ "Cold training26174323 can attenuate adaptation, and cervical-diabetes38546822 fails symptoms; neither cold nor all-device equivalence is established." ], "hsef_level_for_this_model": "Ε", "rationale": "Out-of-scope companion; not evidence for or against the registered sauna claim. TREAT-AF32192678 shows a named home-device objective arrhythmia benefit; cold25121612 helps selected acute submaximal work. Cold training26174323 can attenuate adaptation, and cervical-diabetes38546822 fails symptoms; neither cold nor all-device equivalence is established." }, { "rank_in_tournament": 3, "model_id": "M1", "is_nominal": true, "name": "Repeated heat changes cardiovascular disease trajectory", "core_claim": "Habitual sauna causally lowers hard cardiovascular events through thermal/autonomic/vascular effects.", "explains_what_nominal_does_not": "Habitual sauna causally lowers hard cardiovascular events through thermal/autonomic/vascular effects.", "strongest_supporting_evidence": [ "Finnish event gradients25705824/30486813 align with controlled thermal physiological evidence and selected restricted function. Matched severe-HF Waon prognosis19304125 adds a genuine five-year composite-event association." ], "strongest_contradictory_evidence": [ "Self-selection and overlapping cohort family remain; randomized trials do not yet establish the registered hard-event causal effect and some mechanisms are context-null." ], "hsef_level_for_this_model": "Γ", "rationale": "Finnish event gradients25705824/30486813 align with controlled thermal physiological evidence and selected restricted function. Matched severe-HF Waon prognosis19304125 adds a genuine five-year composite-event association. Self-selection and overlapping cohort family remain; randomized trials do not yet establish the registered hard-event causal effect and some mechanisms are context-null." }, { "rank_in_tournament": 4, "model_id": "M2", "is_nominal": false, "name": "Healthy-user and fitness differences", "core_claim": "Health, fitness, social circumstances and reverse selection explain some apparent longevity association.", "explains_what_nominal_does_not": "Health, fitness, social circumstances and reverse selection explain some apparent longevity association.", "strongest_supporting_evidence": [ "Measured fitness and sauna jointly associate with lower mortality28972808, and higher-use groups differ in health/lifestyle; residual confounding remains plausible." ], "strongest_contradictory_evidence": [ "Controlled exercise-plus-sauna benefits35785965 cannot be dismissed as baseline healthy-user selection, although they do not settle the event association." ], "hsef_level_for_this_model": "Β", "rationale": "Measured fitness and sauna jointly associate with lower mortality28972808, and higher-use groups differ in health/lifestyle; residual confounding remains plausible. Controlled exercise-plus-sauna benefits35785965 cannot be dismissed as baseline healthy-user selection, although they do not settle the event association." } ], "tournament_summary": "Descriptive comparison; does not modify the nominal score. Randomized exercise-plus-sauna35785965 shows that heat can add measured blood-pressure and estimated-fitness effects beyond exercise allocation, and the CKD crossover42113470 shows acute vascular and walking gains. Neither tests hard cardiovascular events, so they identify scoped physiological benefit, not sauna event prevention.", "study_separating_rank1_from_rank2": "Randomized exercise-plus-sauna35785965 shows that heat can add measured blood-pressure and estimated-fitness effects beyond exercise allocation, and the CKD crossover42113470 shows acute vascular and walking gains. Neither tests hard cardiovascular events, so they identify scoped physiological benefit, not sauna event prevention.", "nominal_wins_only_by_funding_artifact": false, "level_unchanged_by_tournament": true }, "evidence_inventory": [ { "n": 1, "pmid": "25705824", "title": "Association between sauna bathing and fatal cardiovascular and all-cause mortality events.", "citation": "Laukkanen T, Khan H, Zaccardi F et al. Association between sauna bathing and fatal cardiovascular and all-cause mortality events. JAMA internal medicine. 2015.", "doi": "10.1001/jamainternmed.2014.8187", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/25705824/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/25705824/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-original-men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Baseline Finnish sauna frequency and duration in 2315 men were inversely associated with subsequent sudden death, fatal coronary disease and cardiovascular/all-cause mortality over decades.", "what_it_does_not_show": "Self-selected exposure, mostly weekly sauna users, one baseline assessment and residual health/social confounding prevent randomized prevention inference; later KIHD reports overlap.", "confounders_present": [ "Self-selected exposure, mostly weekly sauna users, one baseline assessment and residual health/social confounding prevent randomized prevention inference; later KIHD reports overlap." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 2, "pmid": "37248758", "title": "The Interplay between Systolic Blood Pressure, Sauna Bathing, and Cardiovascular Mortality in Middle-Aged and Older Finnish Men: A Cohort Study.", "citation": "Laukkanen JA, Jae SY, Kauhanen J et al. The Interplay between Systolic Blood Pressure, Sauna Bathing, and Cardiovascular Mortality in Middle-Aged and Older Finnish Men: A Cohort Study. The journal of nutrition, health & aging. 2023.", "doi": "10.1007/s12603-023-1895-1", "pmcid": "PMC12878603", "url": "https://pubmed.ncbi.nlm.nih.gov/37248758/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37248758/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-original-men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "KIHD blood-pressure/sauna interaction analysis associated frequent sauna with lower cardiovascular mortality, with limits depending on systolic-pressure threshold.", "what_it_does_not_show": "Same cohort family and covariate adjustment do not isolate exposure or show reliable offsetting of established hypertension risk.", "confounders_present": [ "Same cohort family and covariate adjustment do not isolate exposure or show reliable offsetting of established hypertension risk." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "Longer follow-up/interaction analysis of the KIHD male cohort family." ] }, { "n": 3, "pmid": "30486813", "title": "Sauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women: a prospective cohort study.", "citation": "Laukkanen T, Kunutsor SK, Khan H et al. Sauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women: a prospective cohort study. BMC medicine. 2018.", "doi": "10.1186/s12916-018-1198-0", "pmcid": "PMC6262976", "url": "https://pubmed.ncbi.nlm.nih.gov/30486813/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/30486813/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-later-older-men-and-women", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "A 1688-person older Finnish cohort including women associated sauna frequency/duration with lower cardiovascular mortality after physical-activity and socioeconomic adjustment.", "what_it_does_not_show": "Adjustment and improved risk prediction do not eliminate healthy-user bias; setting, baseline-only exposure and overlapping KIHD recruitment constrain independent causal inference.", "confounders_present": [ "Adjustment and improved risk prediction do not eliminate healthy-user bias; setting, baseline-only exposure and overlapping KIHD recruitment constrain independent causal inference." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "Later KIHD recruitment includes older men and women; cohort family and male-participant overlap restrict independent-line claims." ] }, { "n": 4, "pmid": "28972808", "title": "Joint associations of sauna bathing and cardiorespiratory fitness on cardiovascular and all-cause mortality risk: a long-term prospective cohort study.", "citation": "Kunutsor SK, Khan H, Laukkanen T et al. Joint associations of sauna bathing and cardiorespiratory fitness on cardiovascular and all-cause mortality risk: a long-term prospective cohort study. Annals of medicine. 2018.", "doi": "10.1080/07853890.2017.1387927", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/28972808/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/28972808/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-original-men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "A 2277-man cohort measured cardiorespiratory fitness and associated frequent sauna plus higher fitness with lower cardiovascular and all-cause mortality.", "what_it_does_not_show": "Measuring and adjusting fitness narrows one confounder but does not randomize sauna, eliminate social/health differences or add an independent cohort to overlapping KIHD reports.", "confounders_present": [ "Measuring and adjusting fitness narrows one confounder but does not randomize sauna, eliminate social/health differences or add an independent cohort to overlapping KIHD reports." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "Fitness joint-association analysis overlaps earlier KIHD men." ] }, { "n": 5, "pmid": "32046537", "title": "Cardiovascular reactions for whole-body thermal therapy with a hot pack and Waon therapy.", "citation": "Kominami K, Noda K, Takahashi N et al. Cardiovascular reactions for whole-body thermal therapy with a hot pack and Waon therapy. International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group. 2020.", "doi": "10.1080/02656736.2020.1723719", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/32046537/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32046537/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID32046537", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A nineteen-man randomized crossover compared hot packs and Waon exposure, showing selected temperature, heart-rate and arterial-dilation responses.", "what_it_does_not_show": "Acute skin/artery vasodilation and partial modality similarity do not establish clinical-event prevention or general sauna/heat interchangeability.", "confounders_present": [ "Acute skin/artery vasodilation and partial modality similarity do not establish clinical-event prevention or general sauna/heat interchangeability." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 6, "pmid": "21173495", "title": "Effect of Waon therapy on oxidative stress in chronic heart failure.", "citation": "Fujita S, Ikeda Y, Miyata M et al. Effect of Waon therapy on oxidative stress in chronic heart failure. Circulation journal : official journal of the Japanese Circulation Society. 2011.", "doi": "10.1253/circj.cj-10-0630", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/21173495/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/21173495/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID21173495", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Four-week controlled Waon treatment in forty heart-failure patients lowered oxidative markers and BNP with related hamster stress-protein changes.", "what_it_does_not_show": "Within-group biomarkers and a disease-model mechanism do not prove reduced mortality/hospitalization; treatment and indication differ from broad sauna prevention.", "confounders_present": [ "Within-group biomarkers and a disease-model mechanism do not prove reduced mortality/hospitalization; treatment and indication differ from broad sauna prevention." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 7, "pmid": "15564698", "title": "Effects of repeated sauna treatment on ventricular arrhythmias in patients with chronic heart failure.", "citation": "Kihara T, Biro S, Ikeda Y et al. Effects of repeated sauna treatment on ventricular arrhythmias in patients with chronic heart failure. Circulation journal : official journal of the Japanese Circulation Society. 2004.", "doi": "10.1253/circj.68.1146", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/15564698/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/15564698/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID15564698", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "A randomized thirty-person heart-failure trial reduced Holter premature-ventricular-contraction counts and improved selected HRV/BNP measures after repeated supervised infrared sauna.", "what_it_does_not_show": "Ectopy burden is a rhythm endpoint, not demonstrated fewer sudden deaths or major clinical events; small unequal arms and short follow-up limit broad prevention claims.", "confounders_present": [ "Ectopy burden is a rhythm endpoint, not demonstrated fewer sudden deaths or major clinical events; small unequal arms and short follow-up limit broad prevention claims." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 8, "pmid": "19154844", "title": "Safety, acceptance, and physiologic effects of sauna bathing in people with chronic heart failure: a pilot report.", "citation": "Basford JR, Oh JK, Allison TG et al. Safety, acceptance, and physiologic effects of sauna bathing in people with chronic heart failure: a pilot report. Archives of physical medicine and rehabilitation. 2009.", "doi": "10.1016/j.apmr.2008.06.029", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/19154844/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/19154844/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID19154844", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "A nine-person supervised sauna crossover reported tolerability but no significant between-group exercise-endurance or heart-failure-questionnaire benefit; only one neuroendocrine contrast was significant.", "what_it_does_not_show": "Pilot size yields imprecise nulls and does not establish equivalence or safety for all heart-failure patients or temperatures.", "confounders_present": [ "Pilot size yields imprecise nulls and does not establish equivalence or safety for all heart-failure patients or temperatures." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 9, "pmid": "27001189", "title": "Waon Therapy for Managing Chronic Heart Failure　- Results From a Multicenter Prospective Randomized WAON-CHF Study.", "citation": "Tei C, Imamura T, Kinugawa K et al. Waon Therapy for Managing Chronic Heart Failure　- Results From a Multicenter Prospective Randomized WAON-CHF Study. Circulation journal : official journal of the Japanese Circulation Society. 2016.", "doi": "10.1253/circj.CJ-16-0051", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/27001189/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/27001189/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID27001189", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "The 149-person multicenter WAON-CHF randomized trial found selected secondary NYHA/walking/cardiothoracic improvements, but the primary between-group BNP change was not significant.", "what_it_does_not_show": "Primary-negative short inpatient adjunct therapy cannot be presented as an event-prevention success or transferred to unsupervised Finnish sauna.", "confounders_present": [ "Primary-negative short inpatient adjunct therapy cannot be presented as an event-prevention success or transferred to unsupervised Finnish sauna." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 10, "pmid": "18922381", "title": "Beneficial effects of Waon therapy on patients with chronic heart failure: results of a prospective multicenter study.", "citation": "Miyata M, Kihara T, Kubozono T et al. Beneficial effects of Waon therapy on patients with chronic heart failure: results of a prospective multicenter study. Journal of cardiology. 2008.", "doi": "10.1016/j.jjcc.2008.07.009", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/18922381/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18922381/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18922381", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A 188-person multicenter Waon report found cardiac/BNP and symptom changes during adjunct treatment; several clinical measures improved in both groups.", "what_it_does_not_show": "Many results are within-group contrasts; improvement in one group and not another is not proof of a significant treatment difference, and hard events were not established.", "confounders_present": [ "Many results are within-group contrasts; improvement in one group and not another is not proof of a significant treatment difference, and hard events were not established." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 11, "pmid": "14564334", "title": "Thermal hydrotherapy improves quality of life and hemodynamic function in patients with chronic heart failure.", "citation": "Michalsen A, Lüdtke R, Bühring M et al. Thermal hydrotherapy improves quality of life and hemodynamic function in patients with chronic heart failure. American heart journal. 2003.", "doi": "10.1016/S0002-8703(03)00314-4", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/14564334/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/14564334/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID14564334", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Fifteen mild-heart-failure patients in a randomized crossover warm/cold hydrotherapy bundle had selected quality-of-life, symptom and exercise heart-rate improvements.", "what_it_does_not_show": "A mixed thermal home program does not isolate cold immersion or sauna, and subjective bundle effects do not prove cardiovascular-event prevention.", "confounders_present": [ "A mixed thermal home program does not isolate cold immersion or sauna, and subjective bundle effects do not prove cardiovascular-event prevention." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 12, "pmid": "37969086", "title": "Exposure to passive heat and cold stress differentially modulates cerebrovascular-CO2 responsiveness.", "citation": "Skinner BD, Lucas RAI, Lucas SJE. Exposure to passive heat and cold stress differentially modulates cerebrovascular-CO2 responsiveness. Journal of applied physiology (Bethesda, Md. : 1985). 2024.", "doi": "10.1152/japplphysiol.00494.2023", "pmcid": "PMC11550999", "url": "https://pubmed.ncbi.nlm.nih.gov/37969086/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37969086/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37969086", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Randomized thermal-condition experiments in sixteen adults found different heat/cold effects on cerebral CO2 responsiveness and perfusion-pressure regulation.", "what_it_does_not_show": "Acute cerebrovascular physiology includes adverse-perfusion potential and cannot establish durable cardiovascular or health benefit.", "confounders_present": [ "Acute cerebrovascular physiology includes adverse-perfusion potential and cannot establish durable cardiovascular or health benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 13, "pmid": "22134692", "title": "Cerebrovascular and corticomotor function during progressive passive hyperthermia in humans.", "citation": "Ross EZ, Cotter JD, Wilson L et al. Cerebrovascular and corticomotor function during progressive passive hyperthermia in humans. Journal of applied physiology (Bethesda, Md. : 1985). 2012.", "doi": "10.1152/japplphysiol.00988.2011", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/22134692/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/22134692/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID22134692", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Progressive passive hyperthermia in eight adults reduced cerebral perfusion, voluntary contraction and cortical activation; CO2 restoration partly restored motor measures.", "what_it_does_not_show": "Extreme acute heat with mechanistic rescue demonstrates functional strain, not evidence that usual sauna causes harm or prevents events.", "confounders_present": [ "Extreme acute heat with mechanistic rescue demonstrates functional strain, not evidence that usual sauna causes harm or prevents events." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 14, "pmid": "34487346", "title": "Passive muscle heating attenuates the decline in vascular function caused by limb disuse.", "citation": "Hyldahl RD, Hafen PS, Nelson WB et al. Passive muscle heating attenuates the decline in vascular function caused by limb disuse. The Journal of physiology. 2021.", "doi": "10.1113/JP281900", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/34487346/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34487346/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID34487346", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A twenty-one-person sham-controlled disuse trial found local diathermy heating attenuated femoral vascular-function decline during immobilization.", "what_it_does_not_show": "Localized muscle heating and vascular measures do not establish sauna prevention, added capillary density or reduced clinical events.", "confounders_present": [ "Localized muscle heating and vascular measures do not establish sauna prevention, added capillary density or reduced clinical events." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 15, "pmid": "12370564", "title": "Plasma compartment filling after exercise or heat exposure.", "citation": "Jimenez C, Koulmann N, Mischler I et al. Plasma compartment filling after exercise or heat exposure. Medicine and science in sports and exercise. 2002.", "doi": "10.1097/00005768-200210000-00014", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/12370564/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/12370564/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID12370564", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Randomized heat/exercise dehydration and rehydration experiments in eight subjects found different plasma-volume restoration profiles.", "what_it_does_not_show": "Acute fluid-compartment responses inform thermal strain, not durable event prevention or a sauna dosing recommendation.", "confounders_present": [ "Acute fluid-compartment responses inform thermal strain, not durable event prevention or a sauna dosing recommendation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 16, "pmid": "31002283", "title": "Heat therapy vs. supervised exercise therapy for peripheral arterial disease: a 12-wk randomized, controlled trial.", "citation": "Akerman AP, Thomas KN, van Rij AM et al. Heat therapy vs. supervised exercise therapy for peripheral arterial disease: a 12-wk randomized, controlled trial. American journal of physiology. Heart and circulatory physiology. 2019.", "doi": "10.1152/ajpheart.00151.2019", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/31002283/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31002283/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID31002283", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "A twenty-two-person PAD randomized comparison of heat-plus-calisthenics and supervised exercise found walking/BP improvements in both arms without significant between-arm functional differences.", "what_it_does_not_show": "No nonexercise control and different cointervention doses prevent attributing benefit solely to heat; hot-water therapy is not sauna and no event reduction was tested.", "confounders_present": [ "No nonexercise control and different cointervention doses prevent attributing benefit solely to heat; hot-water therapy is not sauna and no event reduction was tested." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 17, "pmid": "42113470", "title": "Acute effects of passive heat exposure on vascular function and exercise capacity in patients with chronic kidney disease.", "citation": "Chavez DA, Garten RS, Rodriguez-Miguelez P et al. Acute effects of passive heat exposure on vascular function and exercise capacity in patients with chronic kidney disease. American journal of physiology. Heart and circulatory physiology. 2026.", "doi": "10.1152/ajpheart.00020.2026", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/42113470/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42113470/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42113470", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "A ten-person CKD randomized crossover found greater vascular responses and six-minute walking distance after a single infrared-sauna exposure than thermoneutral control.", "what_it_does_not_show": "Acute pilot function and reassuring short kidney markers do not establish sustained benefit or reduced cardiovascular events.", "confounders_present": [ "Acute pilot function and reassuring short kidney markers do not establish sustained benefit or reduced cardiovascular events." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 18, "pmid": "35323077", "title": "Acute effect of passive heat exposure on markers of cardiometabolic function in adults with type 2 diabetes mellitus.", "citation": "Behzadi P, Ravanelli N, Gravel H et al. Acute effect of passive heat exposure on markers of cardiometabolic function in adults with type 2 diabetes mellitus. Journal of applied physiology (Bethesda, Md. : 1985). 2022.", "doi": "10.1152/japplphysiol.00800.2021", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/35323077/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35323077/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID35323077", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "Hot-water versus thermoneutral crossover in thirteen adults with diabetes increased thermal strain but did not improve insulin sensitivity, FMD or selected cardiometabolic markers acutely.", "what_it_does_not_show": "The single exposure and another heat modality constrain chronic sauna inference; null markers do not prove all heat benefits absent.", "confounders_present": [ "The single exposure and another heat modality constrain chronic sauna inference; null markers do not prove all heat benefits absent." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 19, "pmid": "41171178", "title": "Acute vascular function responses predict chronic vascular function changes to heating and exercise interventions in young, healthy recreationally active adults.", "citation": "Cheng JL, Pizzola CA, Mattook KC et al. Acute vascular function responses predict chronic vascular function changes to heating and exercise interventions in young, healthy recreationally active adults. American journal of physiology. Heart and circulatory physiology. 2025.", "doi": "10.1152/ajpheart.00721.2025", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/41171178/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41171178/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID41171178", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Weak", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A secondary analysis of forty-five randomized heating/exercise participants associated acute vascular responses with chronic changes in the same indices.", "what_it_does_not_show": "Correlated responses do not prove mediation or structural remodeling; same-parent trial and proxy prediction are not clinical-event prevention.", "confounders_present": [ "Correlated responses do not prove mediation or structural remodeling; same-parent trial and proxy prediction are not clinical-event prevention." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [ "Secondary acute/chronic response analysis of a heating/exercise trial; not a new allocation experiment." ] }, { "n": 20, "pmid": "39004886", "title": "Six weeks of localized passive heat therapy elicits some exercise-like improvements in resistance artery function.", "citation": "Kaluhiokalani JP, Wallace TE, Ahmadi M et al. Six weeks of localized passive heat therapy elicits some exercise-like improvements in resistance artery function. The Journal of physiology. 2025.", "doi": "10.1113/JP286567", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/39004886/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39004886/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39004886", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "Six-week randomized local heating/sham/exercise comparison improved selected resistance-artery measures with heating but not exercise power; exercise improved power and angiogenesis.", "what_it_does_not_show": "Vascular proxy benefits are not functional-training equivalence or hard-event prevention, and local heating differs from sauna.", "confounders_present": [ "Vascular proxy benefits are not functional-training equivalence or hard-event prevention, and local heating differs from sauna." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 21, "pmid": "31074654", "title": "Passive heat therapy in sedentary humans increases skeletal muscle capillarization and eNOS content but not mitochondrial density or GLUT4 content.", "citation": "Hesketh K, Shepherd SO, Strauss JA et al. Passive heat therapy in sedentary humans increases skeletal muscle capillarization and eNOS content but not mitochondrial density or GLUT4 content. American journal of physiology. Heart and circulatory physiology. 2019.", "doi": "10.1152/ajpheart.00816.2018", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/31074654/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31074654/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID31074654", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Six-week passive heat and exercise in twenty sedentary young men improved capillarization/eNOS and selected aerobic/insulin measures; heat did not reproduce mitochondrial/GLUT4 changes.", "what_it_does_not_show": "Small active-comparator study with no untreated arm does not establish sauna clinical prevention or complete exercise mimicry.", "confounders_present": [ "Small active-comparator study with no untreated arm does not establish sauna clinical prevention or complete exercise mimicry." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 22, "pmid": "40719540", "title": "Post-exercise hot water immersion enhances haemodynamic and vascular benefits of exercise without further improving cardiorespiratory fitness, glucose, lipids or inflammation.", "citation": "Steward CJ, Hill M, Menzies C et al. Post-exercise hot water immersion enhances haemodynamic and vascular benefits of exercise without further improving cardiorespiratory fitness, glucose, lipids or inflammation. The Journal of physiology. 2025.", "doi": "10.1113/JP288873", "pmcid": "PMC12369307", "url": "https://pubmed.ncbi.nlm.nih.gov/40719540/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40719540/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40719540", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A twenty-four-person randomized exercise-plus-hot-water versus exercise-plus-thermoneutral trial improved BP/FMD more with heat, without extra fitness, glucose, lipid or inflammation benefit.", "what_it_does_not_show": "The added thermal water intervention has specific intermediate endpoints; it does not show sauna-alone mortality benefit.", "confounders_present": [ "The added thermal water intervention has specific intermediate endpoints; it does not show sauna-alone mortality benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 23, "pmid": "28003211", "title": "Lower-limb hot-water immersion acutely induces beneficial hemodynamic and cardiovascular responses in peripheral arterial disease and healthy, elderly controls.", "citation": "Thomas KN, van Rij AM, Lucas SJ et al. Lower-limb hot-water immersion acutely induces beneficial hemodynamic and cardiovascular responses in peripheral arterial disease and healthy, elderly controls. American journal of physiology. Regulatory, integrative and comparative physiology. 2017.", "doi": "10.1152/ajpregu.00404.2016", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/28003211/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/28003211/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID28003211", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Acute hot-water exposure in PAD patients and older controls increased limb perfusion/shear and transiently lowered blood pressure.", "what_it_does_not_show": "Acute within-condition physiological responses are not a controlled clinical-event outcome or proof of lasting safer vascular disease trajectory.", "confounders_present": [ "Acute within-condition physiological responses are not a controlled clinical-event outcome or proof of lasting safer vascular disease trajectory." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 24, "pmid": "42803957", "title": "Comparison between exercise and hot water immersion on skin microvascular responses in older adults with overweight and obesity.", "citation": "Wigati KW, Locatelli JC, Costa JG et al. Comparison between exercise and hot water immersion on skin microvascular responses in older adults with overweight and obesity. European journal of applied physiology. 2026.", "doi": "10.1007/s00421-026-06415-2", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/42803957/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42803957/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42803957", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A randomized older-adult crossover found greater acute skin-microvascular changes with hot-water immersion than time-matched exercise.", "what_it_does_not_show": "Skin perfusion and thermal strain measured by OCT are not long-term cardiovascular function or event prevention.", "confounders_present": [ "Skin perfusion and thermal strain measured by OCT are not long-term cardiovascular function or event prevention." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 25, "pmid": "35785965", "title": "Effects of regular sauna bathing in conjunction with exercise on cardiovascular function: a multi-arm, randomized controlled trial.", "citation": "Lee E, Kolunsarka I, Kostensalo J et al. Effects of regular sauna bathing in conjunction with exercise on cardiovascular function: a multi-arm, randomized controlled trial. American journal of physiology. Regulatory, integrative and comparative physiology. 2022.", "doi": "10.1152/ajpregu.00076.2022", "pmcid": "PMC9394774", "url": "https://pubmed.ncbi.nlm.nih.gov/35785965/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35785965/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID35785965", "access_depth": "full_text_partial", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:MATERIALS AND METHODS:paragraph0, 1:MATERIALS AND METHODS:paragraph2, 1:MATERIALS AND METHODS:paragraph5, 1:MATERIALS AND METHODS:paragraph11, 1:MATERIALS AND METHODS:paragraph14, 2:RESULTS:paragraph3, 2:RESULTS:paragraph6. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "The forty-seven-analyzed-participant randomized exercise-plus-sauna arm had lower systolic BP/cholesterol and higher estimated cardiorespiratory fitness than exercise alone after eight weeks.", "what_it_does_not_show": "Fitness was estimated from a submaximal heart-rate test rather than directly measured maximal oxygen uptake; predominantly female sample, bundle exposure and no events limit prevention transfer.", "confounders_present": [ "Fitness was estimated from a submaximal heart-rate test rather than directly measured maximal oxygen uptake; predominantly female sample, bundle exposure and no events limit prevention transfer." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 26, "pmid": "41831305", "title": "Effects of Sauna bathing on Exercise Capacity and Muscle Function in HFpEF.", "citation": "Bekfani T, Abo Hwach A, Moebert R et al. Effects of Sauna bathing on Exercise Capacity and Muscle Function in HFpEF. European journal of heart failure. 2026.", "doi": "10.1093/ejhf/xuag082", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/41831305/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41831305/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID41831305", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Weak", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "An eighteen-completer uncontrolled HFpEF sauna pilot showed exercise/walking/strength and selected quality-of-life improvements, with partial loss after withdrawal.", "what_it_does_not_show": "Withdrawal after an open before-after course does not isolate treatment from practice, regression or co-care; a large controlled trial was described as planned, not underway.", "confounders_present": [ "Withdrawal after an open before-after course does not isolate treatment from practice, regression or co-care; a large controlled trial was described as planned, not underway." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 27, "pmid": "33630675", "title": "Hemodynamics of post-exercise vs. post hot water immersion recovery.", "citation": "Francisco MA, Colbert C, Larson EA et al. Hemodynamics of post-exercise vs. post hot water immersion recovery. Journal of applied physiology (Bethesda, Md. : 1985). 2021.", "doi": "10.1152/japplphysiol.00260.2020", "pmcid": "PMC8354820", "url": "https://pubmed.ncbi.nlm.nih.gov/33630675/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33630675/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33630675", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A randomized-order twelve-person comparison found overlapping and distinct postexercise versus hot-water recovery hemodynamics.", "what_it_does_not_show": "Similar acute recovery variables do not establish shared long-term causal health effects or exercise replacement.", "confounders_present": [ "Similar acute recovery variables do not establish shared long-term causal health effects or exercise replacement." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 28, "pmid": "37650138", "title": "Finnish sauna bathing and vascular health of adults with coronary artery disease: a randomized controlled trial.", "citation": "Debray A, Gravel H, Garceau L et al. Finnish sauna bathing and vascular health of adults with coronary artery disease: a randomized controlled trial. Journal of applied physiology (Bethesda, Md. : 1985). 2023.", "doi": "10.1152/japplphysiol.00322.2023", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/37650138/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37650138/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37650138", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "An eight-week forty-one-person randomized Finnish-sauna CAD trial achieved heat acclimation without improved FMD, arterial stiffness or blood pressure; reactive-hyperemia contrasts did not support benefit.", "what_it_does_not_show": "A genuine disease-context null constrains mechanism generalization, but it does not directly test mortality or prove no possible prevention benefit.", "confounders_present": [ "A genuine disease-context null constrains mechanism generalization, but it does not directly test mortality or prove no possible prevention benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 29, "pmid": "34954348", "title": "Infrared sauna as exercise-mimetic? Physiological responses to infrared sauna vs exercise in healthy women: A randomized controlled crossover trial.", "citation": "Hussain JN, Cohen MM, Mantri N et al. Infrared sauna as exercise-mimetic? Physiological responses to infrared sauna vs exercise in healthy women: A randomized controlled crossover trial. Complementary therapies in medicine. 2022.", "doi": "10.1016/j.ctim.2021.102798", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/34954348/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34954348/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID34954348", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A ten-woman controlled crossover found greater thermal response with infrared sauna but no significant BP, arterial-stiffness or HRV difference versus resting or exercise conditions.", "what_it_does_not_show": "Infrared thermal strain is not complete exercise mimicry; small acute nulls are imprecise and do not adjudicate long-term cardiovascular events.", "confounders_present": [ "Infrared thermal strain is not complete exercise mimicry; small acute nulls are imprecise and do not adjudicate long-term cardiovascular events." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 30, "pmid": "22863164", "title": "Effects of sauna alone and postexercise sauna baths on blood pressure and hemodynamic variables in patients with untreated hypertension.", "citation": "Gayda M, Paillard F, Sosner P et al. Effects of sauna alone and postexercise sauna baths on blood pressure and hemodynamic variables in patients with untreated hypertension. Journal of clinical hypertension (Greenwich, Conn.). 2012.", "doi": "10.1111/j.1751-7176.2012.00637.x", "pmcid": "PMC8108777", "url": "https://pubmed.ncbi.nlm.nih.gov/22863164/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/22863164/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID22863164", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A sixteen-person hypertension comparison found acute vascular-resistance reductions with sauna and selected ambulatory-BP effects with exercise plus sauna.", "what_it_does_not_show": "Combined exposure and brief hemodynamic follow-up do not isolate sauna-alone chronic disease or clinical-event prevention.", "confounders_present": [ "Combined exposure and brief hemodynamic follow-up do not isolate sauna-alone chronic disease or clinical-event prevention." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 31, "pmid": "26174323", "title": "Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training.", "citation": "Roberts LA, Raastad T, Markworth JF et al. Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training. The Journal of physiology. 2015.", "doi": "10.1113/JP270570", "pmcid": "PMC4594298", "url": "https://pubmed.ncbi.nlm.nih.gov/26174323/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/26174323/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID26174323", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "contradicts", "what_it_shows": "A twelve-week randomized strength-training comparison found smaller strength/mass gains with repeated cold-water recovery than active recovery, with separate acute mechanistic findings.", "what_it_does_not_show": "Male training-specific harm does not prove all cold use harmful; it directly challenges equating acute recovery or hormetic stress with durable training benefit.", "confounders_present": [ "Male training-specific harm does not prove all cold use harmful; it directly challenges equating acute recovery or hormetic stress with durable training benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [ "One publication contains chronic-training and separate acute-biopsy studies; report count remains one." ] }, { "n": 32, "pmid": "40498100", "title": "Cold- and hot-water immersion are not more effective than placebo for the recovery of physical performance and training adaptations in national level soccer players.", "citation": "Gustafsson J, Montiel-Rojas D, Romare MGA et al. Cold- and hot-water immersion are not more effective than placebo for the recovery of physical performance and training adaptations in national level soccer players. European journal of applied physiology. 2025.", "doi": "10.1007/s00421-025-05835-w", "pmcid": "PMC12528220", "url": "https://pubmed.ncbi.nlm.nih.gov/40498100/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40498100/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40498100", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "Randomized soccer-player cold/hot-water versus sham-laser recovery showed no superiority in acute performance recovery or fifteen-week adaptation.", "what_it_does_not_show": "Young male athletes and small longer-term completer sample do not establish equivalence or all-population health outcomes.", "confounders_present": [ "Young male athletes and small longer-term completer sample do not establish equivalence or all-population health outcomes." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [ "One report includes acute randomized recovery and smaller longer-term follow-up, not two independent publication rows." ] }, { "n": 33, "pmid": "38613679", "title": "Effect of repeated post-resistance exercise cold or hot water immersion on in-season inflammatory responses in academy rugby players: a randomised controlled cross-over design.", "citation": "Horgan BG, West NP, Tee N et al. Effect of repeated post-resistance exercise cold or hot water immersion on in-season inflammatory responses in academy rugby players: a randomised controlled cross-over design. European journal of applied physiology. 2024.", "doi": "10.1007/s00421-024-05424-3", "pmcid": "PMC11365841", "url": "https://pubmed.ncbi.nlm.nih.gov/38613679/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38613679/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID38613679", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A rugby-player randomized crossover found selected creatine-kinase, inflammatory and growth-factor differences after cold/hot-water recovery.", "what_it_does_not_show": "Biochemical changes and small effects do not establish performance, clinical or durable-health benefit; hydrostatic and period effects remain.", "confounders_present": [ "Biochemical changes and small effects do not establish performance, clinical or durable-health benefit; hydrostatic and period effects remain." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 34, "pmid": "24552795", "title": "Strength training adaptations after cold-water immersion.", "citation": "Fröhlich M, Faude O, Klein M et al. Strength training adaptations after cold-water immersion. Journal of strength and conditioning research. 2014.", "doi": "10.1519/JSC.0000000000000434", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/24552795/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/24552795/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID24552795", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "Seventeen men with randomized leg cooling during strength training showed small trends toward poorer cooled-leg strength gains and retention.", "what_it_does_not_show": "Key leg/interaction tests were not conventionally significant; findings should not be described as a definitive strength-harm replication or a broad health effect.", "confounders_present": [ "Key leg/interaction tests were not conventionally significant; findings should not be described as a definitive strength-harm replication or a broad health effect." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 35, "pmid": "33217726", "title": "Does Cold-Water Immersion After Strength Training Attenuate Training Adaptation?", "citation": "Poppendieck W, Wegmann M, Hecksteden A et al. Does Cold-Water Immersion After Strength Training Attenuate Training Adaptation? International journal of sports physiology and performance. 2021.", "doi": "10.1123/ijspp.2019-0965", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/33217726/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33217726/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33217726", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "An eleven-person randomized training crossover found poorer muscle-thickness adaptation with cooling and nonsignificant strength/jump contrasts with wide intervals.", "what_it_does_not_show": "Small sample and carryover/washout assumptions limit precise durable effect sizes; it is not a cardiovascular or sauna-comparability test.", "confounders_present": [ "Small sample and carryover/washout assumptions limit precise durable effect sizes; it is not a cardiovascular or sauna-comparability test." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 36, "pmid": "25760154", "title": "Does Regular Post-exercise Cold Application Attenuate Trained Muscle Adaptation?", "citation": "Yamane M, Ohnishi N, Matsumoto T. Does Regular Post-exercise Cold Application Attenuate Trained Muscle Adaptation? International journal of sports medicine. 2015.", "doi": "10.1055/s-0034-1398652", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/25760154/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/25760154/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID25760154", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "contradicts", "what_it_shows": "A fourteen-man forearm training comparison found attenuated thickness and selected strength/vascular adaptation with postexercise cooling.", "what_it_does_not_show": "Local muscle exposure and small allocation groups do not support a universal cold-health harm or sauna-equivalence claim.", "confounders_present": [ "Local muscle exposure and small allocation groups do not support a universal cold-health harm or sauna-equivalence claim." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 37, "pmid": "25121612", "title": "Cold water immersion enhances recovery of submaximal muscle function after resistance exercise.", "citation": "Roberts LA, Nosaka K, Coombes JS et al. Cold water immersion enhances recovery of submaximal muscle function after resistance exercise. American journal of physiology. Regulatory, integrative and comparative physiology. 2014.", "doi": "10.1152/ajpregu.00180.2014", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/25121612/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/25121612/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID25121612", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A ten-man randomized crossover found better selected submaximal work six hours after cold immersion, without enhanced maximal-function recovery.", "what_it_does_not_show": "An acute performance benefit is retained but does not establish improved long-term training adaptation or durable health comparable to sauna.", "confounders_present": [ "An acute performance benefit is retained but does not establish improved long-term training adaptation or durable health comparable to sauna." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 38, "pmid": "36553973", "title": "Cold-Water Immersion and Sports Massage Can Improve Pain Sensation but Not Functionality in Athletes with Delayed Onset Muscle Soreness.", "citation": "Angelopoulos P, Diakoronas A, Panagiotopoulos D et al. Cold-Water Immersion and Sports Massage Can Improve Pain Sensation but Not Functionality in Athletes with Delayed Onset Muscle Soreness. Healthcare (Basel, Switzerland). 2022.", "doi": "10.3390/healthcare10122449", "pmcid": "PMC9778006", "url": "https://pubmed.ncbi.nlm.nih.gov/36553973/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36553973/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID36553973", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A sixty-man randomized soreness study found lower pain with cold recovery but no benefit in most functional or muscle-damage measures.", "what_it_does_not_show": "Unblinded symptom relief is distinct from functional recovery and cannot establish durable clinical benefit.", "confounders_present": [ "Unblinded symptom relief is distinct from functional recovery and cannot establish durable clinical benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 39, "pmid": "37043600", "title": "Acute Performance, Daily Well-Being, and Hormone Responses to Water Immersion After Resistance Exercise in Junior International and Subelite Male Volleyball Athletes.", "citation": "Horgan BG, Tee N, West NP et al. Acute Performance, Daily Well-Being, and Hormone Responses to Water Immersion After Resistance Exercise in Junior International and Subelite Male Volleyball Athletes. Journal of strength and conditioning research. 2023.", "doi": "10.1519/JSC.0000000000004428", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/37043600/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37043600/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37043600", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A volleyball-athlete randomized crossover showed selected perceptions and small performance-treatment effects across immersion conditions, with no significant intervention-by-time interactions.", "what_it_does_not_show": "Within-condition and main effects should not be inflated into clear between-treatment adaptation benefits; short follow-up and variability constrain transfer.", "confounders_present": [ "Within-condition and main effects should not be inflated into clear between-treatment adaptation benefits; short follow-up and variability constrain transfer." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 40, "pmid": "27631616", "title": "The Effect of Cold Showering on Health and Work: A Randomized Controlled Trial.", "citation": "Buijze GA, Sierevelt IN, van der Heijden BC et al. The Effect of Cold Showering on Health and Work: A Randomized Controlled Trial. PloS one. 2016.", "doi": "10.1371/journal.pone.0161749", "pmcid": "PMC5025014", "url": "https://pubmed.ncbi.nlm.nih.gov/27631616/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/27631616/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "ErratumIn: PMID30071104" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID27631616", "access_depth": "full_text_partial", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph0, 1:Methods:paragraph1, 1:Methods:paragraph3, 1:Methods:paragraph4, 1:Methods:paragraph10, 2:Results:paragraph0, 2:Results:paragraph1, 2:Results:paragraph2, 2:Results:paragraph4, 2:Results:paragraph20. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "The 3018-person unblinded cold-shower trial reduced self-reported sickness absence by29 percent but not overall illness days; original Methods confirm self-report and retrospective registration before analysis.", "what_it_does_not_show": "Work attendance is not fewer infections or cardiovascular benefit; no sauna comparison, blinding or verified adherence establishes durable comparable health effects, and the linked correction adds omitted underlying Table 2 data without an asserted endpoint revision.", "confounders_present": [ "Work attendance is not fewer infections or cardiovascular benefit; no sauna comparison, blinding or verified adherence establishes durable comparable health effects, and the linked correction adds omitted underlying Table 2 data without an asserted endpoint revision." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 41, "pmid": "39680406", "title": "Transcutaneous Auricular Vagus Nerve Stimulation for Chronic Insomnia Disorder: A Randomized Clinical Trial.", "citation": "Zhang S, Zhao Y, Qin Z et al. Transcutaneous Auricular Vagus Nerve Stimulation for Chronic Insomnia Disorder: A Randomized Clinical Trial. JAMA network open. 2024.", "doi": "10.1001/jamanetworkopen.2024.51217", "pmcid": "PMC11650411", "url": "https://pubmed.ncbi.nlm.nih.gov/39680406/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39680406/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39680406", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A seventy-two-person sham-controlled auricular-stimulation insomnia trial improved PSQI beyond sham over eight weeks with sustained symptom findings.", "what_it_does_not_show": "A defined clinical symptom trial does not establish every consumer device or implanted-VNS equivalence; sensation matching, allocation guessing and objective sleep/function require separate checks.", "confounders_present": [ "A defined clinical symptom trial does not establish every consumer device or implanted-VNS equivalence; sensation matching, allocation guessing and objective sleep/function require separate checks." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 42, "pmid": "37999672", "title": "Noninvasive Vagus Nerve Stimulation in Postural Tachycardia Syndrome: A Randomized Clinical Trial.", "citation": "Stavrakis S, Chakraborty P, Farhat K et al. Noninvasive Vagus Nerve Stimulation in Postural Tachycardia Syndrome: A Randomized Clinical Trial. JACC. Clinical electrophysiology. 2024.", "doi": "10.1016/j.jacep.2023.10.015", "pmcid": "PMC10932945", "url": "https://pubmed.ncbi.nlm.nih.gov/37999672/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37999672/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37999672", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A twenty-six-woman sham-controlled POTS trial reduced measured postural tachycardia with defined tragus stimulation over two months.", "what_it_does_not_show": "A specific disease/device exposure and physiological endpoint do not establish broad consumer wellness claims or eliminate mediation alternatives.", "confounders_present": [ "A specific disease/device exposure and physiological endpoint do not establish broad consumer wellness claims or eliminate mediation alternatives." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 43, "pmid": "36150665", "title": "The efficacy and safety of transcutaneous auricular vagus nerve stimulation in patients with mild cognitive impairment: A double blinded randomized clinical trial.", "citation": "Wang L, Zhang J, Guo C et al. The efficacy and safety of transcutaneous auricular vagus nerve stimulation in patients with mild cognitive impairment: A double blinded randomized clinical trial. Brain stimulation. 2022.", "doi": "10.1016/j.brs.2022.09.003", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/36150665/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36150665/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID36150665", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A small controlled MCI trial favored auricular stimulation on selected cognitive scores after twenty-four weeks.", "what_it_does_not_show": "Cognitive-score changes and many within-arm secondary contrasts do not prove prevention of dementia or clinical equivalence across devices.", "confounders_present": [ "Cognitive-score changes and many within-arm secondary contrasts do not prove prevention of dementia or clinical equivalence across devices." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 44, "pmid": "38452937", "title": "Transcutaneous auricular vagus nerve stimulation for post-stroke depression: A double-blind, randomized, placebo-controlled trial.", "citation": "Liu C, Tang H, Liu C et al. Transcutaneous auricular vagus nerve stimulation for post-stroke depression: A double-blind, randomized, placebo-controlled trial. Journal of affective disorders. 2024.", "doi": "10.1016/j.jad.2024.03.005", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/38452937/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38452937/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID38452937", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "An eighty-patient poststroke-depression report favored adjunct taVNS on symptom/function measures and biomarkers.", "what_it_does_not_show": "Abstract describes double-blind sham design but also conventional-treatment-only controls; comparator credibility requires body verification before a firm causal threshold, and biomarkers do not isolate mediation.", "confounders_present": [ "Abstract describes double-blind sham design but also conventional-treatment-only controls; comparator credibility requires body verification before a firm causal threshold, and biomarkers do not isolate mediation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 45, "pmid": "39689011", "title": "Efficacy and Safety of Transcutaneous Auricular Vagus Nerve Stimulation in Patients With Constipation-Predominant Irritable Bowel Syndrome: A Single-Center, Single-Blind, Randomized Controlled Trial.", "citation": "Liu J, Lv C, Yin M et al. Efficacy and Safety of Transcutaneous Auricular Vagus Nerve Stimulation in Patients With Constipation-Predominant Irritable Bowel Syndrome: A Single-Center, Single-Blind, Randomized Controlled Trial. The American journal of gastroenterology. 2024.", "doi": "10.14309/ajg.0000000000003257", "pmcid": "PMC12398348", "url": "https://pubmed.ncbi.nlm.nih.gov/39689011/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39689011/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39689011", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A forty-person single-blind IBS-C trial favored defined taVNS on bowel/symptom and rectal measures alongside multiomics changes.", "what_it_does_not_show": "Small single-center multiple endpoints and observed mediator correlations do not establish a universal vagal mechanism or consumer-device equivalence.", "confounders_present": [ "Small single-center multiple endpoints and observed mediator correlations do not establish a universal vagal mechanism or consumer-device equivalence." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 46, "pmid": "40398066", "title": "Transcutaneous auricular vagus nerve stimulation (taVNS) improves sleep quality in chronic insomnia disorder: A double-blind, randomized, sham-controlled trial.", "citation": "Yeom JW, Kim H, Park S et al. Transcutaneous auricular vagus nerve stimulation (taVNS) improves sleep quality in chronic insomnia disorder: A double-blind, randomized, sham-controlled trial. Sleep medicine. 2025.", "doi": "10.1016/j.sleep.2025.106579", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/40398066/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40398066/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40398066", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A forty-person sham-controlled insomnia study favored taVNS on symptom scores and selected wearable-derived sleep/QoL outcomes.", "what_it_does_not_show": "Small modified-intention-to-treat study and consumer wearable measures do not validate all brands or objectively confirm sleep physiology; abstract numerical signs/units need body checking before carrying precise estimates.", "confounders_present": [ "Small modified-intention-to-treat study and consumer wearable measures do not validate all brands or objectively confirm sleep physiology; abstract numerical signs/units need body checking before carrying precise estimates." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 47, "pmid": "32192678", "title": "TREAT AF (Transcutaneous Electrical Vagus Nerve Stimulation to Suppress Atrial Fibrillation): A Randomized Clinical Trial.", "citation": "Stavrakis S, Stoner JA, Humphrey MB et al. TREAT AF (Transcutaneous Electrical Vagus Nerve Stimulation to Suppress Atrial Fibrillation): A Randomized Clinical Trial. JACC. Clinical electrophysiology. 2020.", "doi": "10.1016/j.jacep.2019.11.008", "pmcid": "PMC7100921", "url": "https://pubmed.ncbi.nlm.nih.gov/32192678/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32192678/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID32192678", "access_depth": "full_text_partial", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 0:Methods:paragraph0, 0:Methods:paragraph1, 0:Methods:paragraph2, 0:Methods:paragraph3, 0:Methods:paragraph6, 0:Methods:paragraph7, 1:Results:paragraph0, 1:Results:paragraph1, 1:Results:paragraph2, 1:Results:paragraph3, 1:Results:paragraph6. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "The 53-person TREAT-AF trial used a named home Parasym device with tragus versus earlobe stimulation and blinded outcome assessors; ECG-patch AF burden was lower at six months.", "what_it_does_not_show": "This is a genuine specific-device/indication positive, not proof every consumer stimulation reproduces implanted benefits or prevents stroke/death; intermittent ECG windows and small sample remain.", "confounders_present": [ "This is a genuine specific-device/indication positive, not proof every consumer stimulation reproduces implanted benefits or prevents stroke/death; intermittent ECG windows and small sample remain." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 48, "pmid": "37787432", "title": "Transcutaneous Auricular Vagal Nerve Stimulation Is Effective for the Treatment of Functional Dyspepsia: A Multicenter, Randomized Controlled Study.", "citation": "Shi X, Zhao L, Luo H et al. Transcutaneous Auricular Vagal Nerve Stimulation Is Effective for the Treatment of Functional Dyspepsia: A Multicenter, Randomized Controlled Study. The American journal of gastroenterology. 2024.", "doi": "10.14309/ajg.0000000000002548", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/37787432/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37787432/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID37787432", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A three-hundred-person randomized functional-dyspepsia trial favored defined 10/25 Hz taVNS on prespecified symptom response and adequate relief versus sham.", "what_it_does_not_show": "Specific dose/site and diagnosed symptoms cannot be transferred to all products, diseases or cardiovascular-event prevention; blinding integrity remains separate from randomized labeling.", "confounders_present": [ "Specific dose/site and diagnosed symptoms cannot be transferred to all products, diseases or cardiovascular-event prevention; blinding integrity remains separate from randomized labeling." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 49, "pmid": "33144299", "title": "Transcutaneous auricular vagus nerve stimulation reduces pain and fatigue in patients with systemic lupus erythematosus: a randomised, double-blind, sham-controlled pilot trial.", "citation": "Aranow C, Atish-Fregoso Y, Lesser M et al. Transcutaneous auricular vagus nerve stimulation reduces pain and fatigue in patients with systemic lupus erythematosus: a randomised, double-blind, sham-controlled pilot trial. Annals of the rheumatic diseases. 2021.", "doi": "10.1136/annrheumdis-2020-217872", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/33144299/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33144299/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "ErratumIn: PMID34412029" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33144299", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "An eighteen-person sham-controlled lupus pilot improved selected pain/fatigue/joint scores but most inflammatory mediators did not change.", "what_it_does_not_show": "Small short symptom benefit does not establish a general anti-inflammatory mechanism or device-class equivalence; a linked correction remains attached.", "confounders_present": [ "Small short symptom benefit does not establish a general anti-inflammatory mechanism or device-class equivalence; a linked correction remains attached." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 50, "pmid": "39828740", "title": "Transcutaneous vagus nerve stimulation as a pain modulator in knee osteoarthritis: a randomized controlled clinical trial.", "citation": "Elsehrawy GG, Ibrahim ME, A Moneim NH et al. Transcutaneous vagus nerve stimulation as a pain modulator in knee osteoarthritis: a randomized controlled clinical trial. BMC musculoskeletal disorders. 2025.", "doi": "10.1186/s12891-025-08288-6", "pmcid": "PMC11744843", "url": "https://pubmed.ncbi.nlm.nih.gov/39828740/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39828740/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID39828740", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "A sixty-eight-person knee-osteoarthritis taVNS/sham trial reported selected pain/functional improvements, largely as within-group contrasts.", "what_it_does_not_show": "Significance within active but not sham arms is not a demonstrated between-arm treatment difference; device and indication transfer remain unestablished.", "confounders_present": [ "Significance within active but not sham arms is not a demonstrated between-arm treatment difference; device and indication transfer remain unestablished." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 51, "pmid": "40697962", "title": "Efficacy and safety of transcutaneous auricular vagus nerve stimulation plus pregabalin for radiotherapy-related neuropathic pain in patients with head and neck cancer (RELAX): a phase 2 randomised trial.", "citation": "Zuo X, Xu Y, Li S et al. Efficacy and safety of transcutaneous auricular vagus nerve stimulation plus pregabalin for radiotherapy-related neuropathic pain in patients with head and neck cancer (RELAX): a phase 2 randomised trial. EClinicalMedicine. 2025.", "doi": "10.1016/j.eclinm.2025.103345", "pmcid": "PMC12280346", "url": "https://pubmed.ncbi.nlm.nih.gov/40697962/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40697962/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40697962", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "The 116-person multicenter RELAX trial found greater seven-day pain reduction with taVNS plus pregabalin than sham plus pregabalin.", "what_it_does_not_show": "Adjunct short pain relief in cancer survivors does not establish standalone long-term consumer efficacy or isolate the proposed vagal mediator.", "confounders_present": [ "Adjunct short pain relief in cancer survivors does not establish standalone long-term consumer efficacy or isolate the proposed vagal mediator." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [] }, { "n": 52, "pmid": "41455014", "title": "Transauricular Vagus Nerve Stimulation in Acute Ischaemic Stroke Requiring Mechanical Thrombectomy: Sham-Controlled, Randomised Device Trial.", "citation": "Ackland GL, Crane D, Ahuja S et al. Transauricular Vagus Nerve Stimulation in Acute Ischaemic Stroke Requiring Mechanical Thrombectomy: Sham-Controlled, Randomised Device Trial. Translational stroke research. 2025.", "doi": "10.1007/s12975-025-01404-7", "pmcid": "PMC12743696", "url": "https://pubmed.ncbi.nlm.nih.gov/41455014/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41455014/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID41455014", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "A thirty-six-person blinded stroke-thrombectomy trial did not change its primary 24-hour systolic-pressure-variability outcome despite molecular/HRV changes.", "what_it_does_not_show": "Safety/feasibility and gene effects are not success on the primary endpoint or proof of a durable neurological/device benefit.", "confounders_present": [ "Safety/feasibility and gene effects are not success on the primary endpoint or proof of a durable neurological/device benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 53, "pmid": "39251831", "title": "Transcutaneous vagus nerve stimulation has no anti-inflammatory effect in diabetes.", "citation": "Okdahl T, Kufaishi H, Kornum D et al. Transcutaneous vagus nerve stimulation has no anti-inflammatory effect in diabetes. Scientific reports. 2024.", "doi": "10.1038/s41598-024-72139-y", "pmcid": "PMC11385211", "url": "https://pubmed.ncbi.nlm.nih.gov/39251831/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39251831/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "NCT04143269", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "null", "what_it_shows": "A secondary randomized-diabetes analysis found no active-versus-sham inflammatory-cytokine effect over short and longer stimulation periods.", "what_it_does_not_show": "Same-parent NCT04143269 evidence is not a new independent clinical trial; a near-significant subgroup trend does not reverse the whole-sample null.", "confounders_present": [ "Same-parent NCT04143269 evidence is not a new independent clinical trial; a near-significant subgroup trend does not reverse the whole-sample null." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "", "shared_components": [ "Secondary inflammation analysis of the parent diabetic-gastroenteropathy trial NCT04143269." ] }, { "n": 54, "pmid": "38546822", "title": "Transcutaneous vagal nerve stimulation for treating gastrointestinal symptoms in individuals with diabetes: a randomised, double-blind, sham-controlled, multicentre trial.", "citation": "Kornum DS, Bertoli D, Kufaishi H et al. Transcutaneous vagal nerve stimulation for treating gastrointestinal symptoms in individuals with diabetes: a randomised, double-blind, sham-controlled, multicentre trial. Diabetologia. 2024.", "doi": "10.1007/s00125-024-06129-0", "pmcid": "PMC11058613", "url": "https://pubmed.ncbi.nlm.nih.gov/38546822/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38546822/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "NCT04143269", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "null", "what_it_shows": "A 145-randomized-person multicenter cervical-stimulation diabetes trial found no greater gastrointestinal symptom reduction than sham over either period.", "what_it_does_not_show": "A defined null constrains broad device/mechanism transfer but does not negate successes in different indications; gastric-emptying change did not establish symptom benefit.", "confounders_present": [ "A defined null constrains broad device/mechanism transfer but does not negate successes in different indications; gastric-emptying change did not establish symptom benefit." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 55, "pmid": "38083234", "title": "Transcutaneous Auricular Vagus Nerve Stimulation towards Visually Induced Motion Sickness Reduction: A Pilot Study.", "citation": "Molefi E, McLoughlin I, Palaniappan R. Transcutaneous Auricular Vagus Nerve Stimulation towards Visually Induced Motion Sickness Reduction: A Pilot Study. Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference. 2023.", "doi": "10.1109/EMBC40787.2023.10340374", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/38083234/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38083234/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID38083234", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A fifteen-person sham-controlled motion-sickness pilot found selected EEG and symptom-score effects.", "what_it_does_not_show": "Small acute symptom and EEG findings do not establish chemotherapy efficacy, broad durable health benefit or equivalence to established medical stimulation.", "confounders_present": [ "Small acute symptom and EEG findings do not establish chemotherapy efficacy, broad durable health benefit or equivalence to established medical stimulation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 56, "pmid": "40629377", "title": "Baseline functional connectivity of the basal forebrain-cortical circuit predict taVNS treatment response in primary insomnia: a randomized controlled trial and fMRI study.", "citation": "Qi M, Huang Y, Mai R et al. Baseline functional connectivity of the basal forebrain-cortical circuit predict taVNS treatment response in primary insomnia: a randomized controlled trial and fMRI study. BMC medicine. 2025.", "doi": "10.1186/s12916-025-04126-7", "pmcid": "PMC12239473", "url": "https://pubmed.ncbi.nlm.nih.gov/40629377/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40629377/", "tier": "A", "source_tier": "A", "kind": "rct", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40629377", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC5" ], "favors_models": [], "evidence_class": "Moderate", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "A randomized insomnia study favored real taVNS on symptom scales and related fMRI connectivity, with exploratory independently tested prediction.", "what_it_does_not_show": "Connectivity correlation/prediction is not mediator manipulation or necessity; it does not establish all-device equivalence or durable functional recovery.", "confounders_present": [ "Connectivity correlation/prediction is not mediator manipulation or necessity; it does not establish all-device equivalence or durable functional recovery." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 57, "pmid": "19304125", "title": "Waon therapy improves the prognosis of patients with chronic heart failure.", "citation": "Kihara T, Miyata M, Fukudome T et al. Waon therapy improves the prognosis of patients with chronic heart failure. Journal of cardiology. 2009.", "doi": "10.1016/j.jjcc.2008.11.005", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/19304125/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/19304125/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID19304125", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": true, "endogenous": false, "direction": "supports", "what_it_shows": "In 129 NYHA III/IV heart-failure patients, 64 supervised Waon recipients and 65 age/gender/NYHA-matched traditional-care controls had five-year HF or cardiac-death composite rates 31.3% versus 68.7%; deaths were eight versus twelve.", "what_it_does_not_show": "No random allocation stated; matched advanced-HF adjunct treatment with continued postdischarge exposure is not habitual sauna primary prevention. Selection, co-care and composite components remain unresolved; deaths alone do not establish isolated mortality reduction.", "confounders_present": [ "No random allocation stated; matched advanced-HF adjunct treatment with continued postdischarge exposure is not habitual sauna primary prevention. Selection, co-care and composite components remain unresolved; deaths alone do not establish isolated mortality reduction." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": true, "decisive_test_note": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 58, "pmid": "29720543", "title": "Sauna bathing reduces the risk of stroke in Finnish men and women: A prospective cohort study.", "citation": "Kunutsor SK, Khan H, Zaccardi F et al. Sauna bathing reduces the risk of stroke in Finnish men and women: A prospective cohort study. Neurology. 2018.", "doi": "10.1212/WNL.0000000000005606", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/29720543/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29720543/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-11-02", "status_checked_on": "2026-11-02", "study_id": "KIHD-later-older-men-and-women", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract and PubMed metadata examined via PubMed get_article_metadata on 2026-11-02 (added under adversarial finding S5); no complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Baseline sauna frequency in 1628 KIHD men and women without prior stroke was inversely associated with 155 incident strokes over a median 14.9 years; HR 0.38 (0.18-0.81) for 4-7 versus 1 session per week after risk-factor, physical-activity and socioeconomic adjustment.", "what_it_does_not_show": "Self-selected baseline exposure in the same KIHD cohort family as refs 1-4; adds an incident (non-mortality) endpoint, not an independent cohort or causal allocation. PubMed indexes the article type as Editorial although the abstract reports a prospective cohort.", "confounders_present": [ "Self-selected baseline exposure in the same KIHD cohort family as refs 1-4; adds an incident (non-mortality) endpoint, not an independent cohort or causal allocation. PubMed indexes the article type as Editorial although the abstract reports a prospective cohort." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] }, { "n": 59, "pmid": "32209614", "title": "Habitual tub bathing and risks of incident coronary heart disease and stroke.", "citation": "Ukai T, Iso H, Yamagishi K et al. Habitual tub bathing and risks of incident coronary heart disease and stroke. Heart (British Cardiac Society). 2020.", "doi": "10.1136/heartjnl-2019-315752", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/32209614/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32209614/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-11-02", "status_checked_on": "2026-11-02", "study_id": "PMID32209614", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract and PubMed metadata examined via PubMed get_article_metadata on 2026-11-02 (added under adversarial finding S5); no complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "In 30,076 Japanese adults aged 40-59 without CVD or cancer, almost-daily tub bathing versus 0-2 times per week was associated with lower incident CVD (HR 0.72, 0.62-0.84), CHD and total stroke over 538,373 person-years; no association with sudden cardiac death.", "what_it_does_not_show": "Hot-water tub bathing, not sauna; observational with self-reported baseline bathing frequency and residual confounding. Bears on geographic replication of the heat-exposure association, not on sauna causation.", "confounders_present": [ "Hot-water tub bathing, not sauna; observational with self-reported baseline bathing frequency and residual confounding. Bears on geographic replication of the heat-exposure association, not on sauna causation." ], "verification": "verified", "verification_note": "Bounded source attribution; not proof of the nominal mechanism.", "citation_context": { "retrieved": false, "supporting_count": 0, "mentioning_count": 0, "contrasting_count": 0, "notable_contrasting_statements": [] }, "discriminating_contrast": false, "decisive_test_note": "", "shared_components": [] } ], "verification_summary": { "load_bearing_claims_checked": 65, "verified": 65, "unverified": 0, "contradicted": 0, "note": "Verified attribution is distinct from mechanism truth or complete body access." }, "factual_issues_found": [], "cap_rules_applied": [ { "subclaim_id": "SC1", "cap": "Γ", "cap_source": "universal", "triggered": true, "trigger_text_quoted": "Biomarker change without functional/phenotypic change caps at Γ.", "specific_trigger": "Controlled human heat studies establish real physiological responses. Their Γ assignment here concerns the prevention-mechanism inference: blood pressure, flow, thermal acclimation and other intermediate changes are not proof of fewer hard cardiovascular events. Positive walking/function studies retain their specific clinical context; the physiological phenomenon itself is not denied.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC2", "cap": "Γ", "cap_source": "boundary_check", "triggered": true, "trigger_text_quoted": "No field-valid hard-event perturbation: ceiling Γ", "specific_trigger": "Universal cap 2 (“Pure association evidence — however large, however replicated — cannot exceed Β.”) binds the KIHD event evidence at Β. The Finnish event cohorts show persuasive prospective inverse associations, and a matched 129-patient severe-heart-failure Waon cohort reports fewer five-year HF/cardiac-death composite events. Neither source establishes random allocation or an independent causal instrument; supervised adjunct therapy is also distinct from habitual sauna primary prevention. Randomized thermal trials address short-term risk factors, ectopy or function with meaningful positive and null results. No independently valid same-scope sauna hard-event causal experiment was verified; Γ captures mechanism/partial intervention support.", "resulting_ceiling": "Γ" }, { "subclaim_id": "SC3", "cap": "Β", "cap_source": "universal", "triggered": true, "trigger_text_quoted": "Pure association evidence — however large, however replicated — cannot exceed Β.", "specific_trigger": "Measured fitness and socioeconomic adjustment reduce selected explanations but do not eliminate unmeasured healthy-user, prior-disease, social and exposure-selection effects. A joint-association analysis of overlapping participants is not an independent instrument; confounding independence remains unestablished at Β.", "resulting_ceiling": "Β" } ], "cap_precedence_resolutions": [ { "collision": "Perturbation in a defined setting versus broader inference", "subclaim_scope_cap_binds_on": "Regular sauna use causally reduces cardiovascular clinical events in adults.", "subclaim_scope_threshold_binds_on": "The precise experimentally tested subclaim scope", "resolution": "A controlled thermal experiment can establish an intermediate or restricted functional effect in its actual setting. Universal biomarker and association constraints govern its transfer to fewer cardiovascular events. Multiple overlapping event-cohort reports are not independent causal lines, and actual device-specific clinical benefits are preserved without licensing a device-class equivalence inference. No weak leg is re-capped over a verified same-scope complementary causal set; such an event-prevention set was not verified.", "note": "Convergent lines are assessed as a set; one weak leg is not re-capped over the assembled case." } ], "boundary_check_BGD": [ { "subclaim_id": "SC1", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Controlled BP/FMD, oxidative stress, HRV and acclimation cannot substitute for hard events. Cold subjective/work-absence outcomes do not establish fewer illness days or sauna-equivalent prevention. Named clinical VNS positives remain device/indication scoped rather than dismissed or generalized." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Controlled human heat studies establish real physiological responses. Their Γ assignment here concerns the prevention-mechanism inference: blood pressure, flow, thermal acclimation and other intermediate changes are not proof of fewer hard cardiovascular events. Positive walking/function studies retain their specific clinical context; the physiological phenomenon itself is not denied.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC2", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Controlled BP/FMD, oxidative stress, HRV and acclimation cannot substitute for hard events. Cold subjective/work-absence outcomes do not establish fewer illness days or sauna-equivalent prevention. Named clinical VNS positives remain device/indication scoped rather than dismissed or generalized." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "The Finnish event cohorts show persuasive prospective inverse associations, and a matched 129-patient severe-heart-failure Waon cohort reports fewer five-year HF/cardiac-death composite events. Neither source establishes random allocation or an independent causal instrument; supervised adjunct therapy is also distinct from habitual sauna primary prevention. Randomized thermal trials address short-term risk factors, ectopy or function with meaningful positive and null results. No independently valid same-scope sauna hard-event causal experiment was verified; Γ captures mechanism/partial intervention support.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC3", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Controlled BP/FMD, oxidative stress, HRV and acclimation cannot substitute for hard events. Cold subjective/work-absence outcomes do not establish fewer illness days or sauna-equivalent prevention. Named clinical VNS positives remain device/indication scoped rather than dismissed or generalized." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Measured fitness and socioeconomic adjustment reduce selected explanations but do not eliminate unmeasured healthy-user, prior-disease, social and exposure-selection effects. A joint-association analysis of overlapping participants is not an independent instrument; confounding independence remains unestablished at Β.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC4", "field_valid_perturbation_quote": "\n- Genetic or pharmacologic intervention producing reproducible lifespan/healthspan extension\n- Must separate developmental effects from true aging effects\n- Biomarker change alone does NOT satisfy this threshold", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Controlled BP/FMD, oxidative stress, HRV and acclimation cannot substitute for hard events. Cold subjective/work-absence outcomes do not establish fewer illness days or sauna-equivalent prevention. Named clinical VNS positives remain device/indication scoped rather than dismissed or generalized." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Cold has specific acute performance/symptom results and an unblinded self-reported sickness-absence positive, alongside training-adaptation harm and placebo-null findings. None establishes durable cardiovascular or overall health benefit comparable with sauna. Γ retains partial intervention support without extrapolating absence from nonsignificance.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC5", "field_valid_perturbation_quote": "at least one of:\n- Active comparator matched for acute subjective effect, blinding integrity measured and reported\n- Blinded on/off, staggered-onset, or randomized-withdrawal neuromodulation, reversible and within-subject\n- Mediator manipulation with the intervention intact: antagonist blockade of the acute experience with the drug still given, or dosing under general anaesthesia\n- Depletion or challenge experiment in humans whose outcome is symptom trajectory, not a biomarker\n- Psychotherapy component dismantling, or scaffold removal from a drug arm, with blinded assessors\n\nRating-scale or biomarker change alone does NOT satisfy this threshold when the claim is functional, and statistical mediation alone never satisfies it.", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Controlled BP/FMD, oxidative stress, HRV and acclimation cannot substitute for hard events. Cold subjective/work-absence outcomes do not establish fewer illness days or sauna-equivalent prevention. Named clinical VNS positives remain device/indication scoped rather than dismissed or generalized." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Defined noninvasive devices can have genuine clinical effects, including home Parasym stimulation with objective AF-burden benefit. That disproves a blanket claim that auricular devices have no controlled evidence. Yet exact product, site, current, indication and comparator cannot be transferred across all consumer products or equated with implanted medical stimulation; the broad equivalence inference remains Γ.", "ceiling_from_boundary_check": "Γ" } ], "thresholds_tested": [ { "subclaim_id": "SC1", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A registered exposure-specific clinical experiment or independent natural instrument with relevant endpoints, credible comparator, prespecified modality/dose, baseline disease, adequate follow-up and safety. For SC2 this requires hard cardiovascular events; cold and consumer-device equivalence require their own durable/head-to-head outcome tests." }, { "subclaim_id": "SC2", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A registered exposure-specific clinical experiment or independent natural instrument with relevant endpoints, credible comparator, prespecified modality/dose, baseline disease, adequate follow-up and safety. For SC2 this requires hard cardiovascular events; cold and consumer-device equivalence require their own durable/head-to-head outcome tests." }, { "subclaim_id": "SC3", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A registered exposure-specific clinical experiment or independent natural instrument with relevant endpoints, credible comparator, prespecified modality/dose, baseline disease, adequate follow-up and safety. For SC2 this requires hard cardiovascular events; cold and consumer-device equivalence require their own durable/head-to-head outcome tests." }, { "subclaim_id": "SC4", "threshold": "Δ", "requirement_quoted": "Requires at least one intervention changing lifespan or healthspan in a way consistent with the hypothesis.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A registered exposure-specific clinical experiment or independent natural instrument with relevant endpoints, credible comparator, prespecified modality/dose, baseline disease, adequate follow-up and safety. For SC2 this requires hard cardiovascular events; cold and consumer-device equivalence require their own durable/head-to-head outcome tests." }, { "subclaim_id": "SC5", "threshold": "Δ", "requirement_quoted": "Requires a controlled human interventional study with a credible active comparator, or a mediator manipulation in humans, with a pre-registered primary outcome.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A registered exposure-specific clinical experiment or independent natural instrument with relevant endpoints, credible comparator, prespecified modality/dose, baseline disease, adequate follow-up and safety. For SC2 this requires hard cardiovascular events; cold and consumer-device equivalence require their own durable/head-to-head outcome tests." } ], "generalization_check": { "generalization_tested": "yes", "context_boundary_mapped": "yes", "internal_negative_controls": "Stable CAD trial37650138 showed acclimation without vascular/BP benefit, diabetes acute-heat35323077 was proxy-null, and infrared/exercise crossover34954348 was not fully exercise-mimetic. Cold adaptation harms and specific VNS positives/nulls further mark intervention/indication boundaries.", "note": "These are experimentally observed physiological or therapeutic-context boundaries, not a mapped hard-event benefit that generalizes to all adults. Finnish observational mortality gradients, supervised Waon, water immersion and localized heating remain distinct. The registered prevention endpoint is not replaced after seeing the outcomes." }, "falsification_patterns_met": [], "pitfalls_flagged": [ { "pitfall": "Confirmation by biomarker", "where": "BP, FMD, BNP, oxidative markers, HRV or thermal acclimation are treated as proof of event prevention." }, { "pitfall": "Replication confused with reproduction", "where": "KIHD reanalyses and secondary device-trial cytokine reports are counted as independent studies." }, { "pitfall": "Selective generalization", "where": "Supervised infrared Waon, hot-water exercise bundles and localized heating are transferred to all sauna use; specific clinical devices to all consumer products." }, { "pitfall": "Negative field-valid perturbation read as a crossed threshold", "where": "WAON primary BNP, CAD vascular/BP, cold-placebo and cervical-diabetes nulls are not positive causal crossings." }, { "pitfall": "Missing-control interpretation", "where": "Within-group significance and absent sauna-only or passive control arms are treated as between-group causal proof." }, { "pitfall": "Mechanism conflation", "where": "Heat, cold and electrical vagal stimulation are bundled as interchangeable stress or wellness interventions." } ], "causal_tally_audit": { "tally_claimed_by_document": 0, "tally_after_audit": 0, "tally_unit": "Positive qualifying study units across scoped subclaims, not independent causal lines or full-claim necessity/sufficiency.", "screened_discriminating_contrasts": 27, "items_rejected": [ "Null and negative contrasts are discriminators, not positive threshold crossings. Reports and replications are not independent causal lines.", "No same-scope positive hard-event causal study unit is claimed for the broad sauna prevention proposition.", "Secondary functional positives and actual ECG arrhythmia-burden positives are important but do not become sauna mortality-prevention trials.", "Sham labels, objective assessors and allocation-guess verification are separate facts.", "No universal assertion of zero effect or complete absence of thermal event reports is made." ] }, "steelman": { "case_one_rung_higher": "One rung above (Δ): the exposure-dose and duration gradients for hard events are prospective, measured-fitness adjustment does not erase them, and controlled heat studies provide intervention support for plausible cardiovascular pathways. A valid natural experiment or independently corroborated exposure/withdrawal event analysis could legitimately cross Δ without an RCT.", "case_one_rung_lower": "One rung below (Β): actual hard-event sauna evidence is primarily observational, with shared recruitment and self-selection. If only the clinical endpoint were considered, a conservative reviewer could hold the nominal to association.", "which_rejected": "Δ is rejected because independent hard-event causal allocation/instruments or sufficiently distinct same-scope causal lines were not verified; controlled biomarkers/function cannot be assumed to mediate mortality. Β is rejected for SC2 because its own scope contains randomized human thermal interventions with disease-relevant functional and rhythm endpoints in heart failure (WAON-CHF secondary NYHA and 6MWD; Holter PVC reduction) and a matched, non-randomized Waon cohort with fewer hard events; these exceed co-occurrence, but none is a field-valid hard-event perturbation, so Γ holds. The full claim therefore remains Γ while the hard-event association is separately described as observational. The severe-HF matched hard-event positive19304125 is retained in this balance; its lack of stated random allocation and treatment/indication mismatch prevent an automatic causal crossing for habitual sauna in adults.", "blocking_cap_threshold_or_missing_experiment": "Missing experiment: A multicenter randomized pragmatic sauna-plus-usual-care versus matched usual-care/time-contact study, or a validated independent access/withdrawal natural experiment, with adjudicated cardiovascular hospitalization, infarction, stroke and cardiovascular death over prespecified follow-up, stratifying baseline disease and exercise before outcomes." }, "final_score": { "hsef_level": "Γ", "hsef_descriptor": "Mechanistically plausible, partial system support", "confidence": "Moderate", "confidence_rationale": "Multiple studies across the 33 in-scope heat/sauna reports (refs 1-30 and 57-59), of which the hard-event evidence is one Finnish cohort family (fatal-event analyses plus one incident-stroke report), one matched Waon cohort and one observational non-Finnish hot-tub bathing cohort, with partial replication but methodological heterogeneity in comparators, modalities and endpoints. The 26 cold-water and vagus-nerve reports (refs 31-56) concern out-of-scope companion subclaims and are not counted. Evidence density and reproducibility set the band, not reviewer access or correctness.", "rests_on_non_peer_reviewed_work": false, "rationale": "Primary-subclaim aggregation returns SC2 Γ: prospective mortality associations and meaningful controlled physiology/function supply a coherent biological rationale, while same-scope hard-event causal identification remains unverified. This is unconfirmed prevention, not evidence that sauna is physiologically inert or that every heat, cold or neuromodulation intervention is ineffective." }, "role_of_mechanism": { "classification": "epiphenomenon", "derivation_step_matched": 2, "derivation": "For the registered hard cardiovascular event reduction, no causal dependency of habitual sauna was directly established in either direction. The framework role is an evidence-state classification for this endpoint, not proof sauna is biologically inactive; experimentally demonstrated thermal physiology and specific clinical benefits are reported separately. Here 'epiphenomenon' means only that a causal role for habitual sauna in preventing hard cardiovascular events is not established by the evidence; it does not mean sauna has no effect, since randomized trials show it causally lowers blood pressure (PMID 35785965) and reduces ventricular ectopy in heart failure (PMID 15564698).", "tournament_used_as_tiebreaker": false, "note": "Derived from causal direction, not tournament rank." }, "extended_scoring_MSD": { "momentum": { "value": "Mechanistic only", "artifact": "Verified randomized work includes CAD37650138, exercise-plus-sauna35785965 and acute CKD42113470; HFpEF41831305 describes a larger controlled trial as being planned. No verified active hard-event sauna trial or independent event natural experiment was identified, so planned work is not mislabeled underway.", "justification": "Verified randomized work includes CAD37650138, exercise-plus-sauna35785965 and acute CKD42113470; HFpEF41831305 describes a larger controlled trial as being planned. No verified active hard-event sauna trial or independent event natural experiment was identified, so planned work is not mislabeled underway." }, "stability": { "value": "Stable", "trigger": "A named hard-event causal experiment would move the grade, but none was verified as pending; planned HFpEF functional work does not automatically determine the broad prevention letter.", "justification": "A named hard-event causal experiment would move the grade, but none was verified as pending; planned HFpEF functional work does not automatically determine the broad prevention letter." }, "divergence": { "implied_level": null, "implied_level_basis": "No single field-implied level is defensible from conflicting framings.", "assessed_level": "Γ", "gap_in_rungs": null, "value": "Contested", "justification": "No manufactured field consensus or arithmetic gap." }, "calibration_note": "M/S/D never modify HSEF level or confidence." }, "change_record": { "applies": false, "prior_level": "none assigned", "prior_confidence": null, "prior_source": null, "derived_before_consulting_prior": true, "new_level": "Γ", "direction": "newly assigned", "what_moved_it": "Fresh primary evidence appraisal; not blinded.", "divergence_from_other_reviewers": null }, "proposed_decisive_experiments": [ { "name": "Registered boundary experiment", "experiment": "A multicenter randomized pragmatic sauna-plus-usual-care versus matched usual-care/time-contact study, or a validated independent access/withdrawal natural experiment, with adjudicated cardiovascular hospitalization, infarction, stroke and cardiovascular death over prespecified follow-up, stratifying baseline disease and exercise before outcomes.", "readout": "Adjudicated hard-event incidence and clinically meaningful function; BP/FMD/BNP and autonomic markers secondary, with mechanism mediation separately tested rather than assumed", "critical_control": "Repeated measured exposure/adherence, balanced exercise and clinical care, contact/relaxation comparator, blinded outcome adjudication, prespecified high-risk/primary-prevention strata and complete adverse-event capture; natural experiments require explicit exclusion and selection checks", "supporting_result": "A reproducible clinically important event reduction survives independent causal design and exposure/health confounding checks; restricted phenotypic effects explain a verified portion of the event difference", "falsifying_result": "Adequately precise unchanged event rates despite exposure/target engagement, or event differences explained by selection/co-care; a biomarker-positive event-null result does not cross the prevention threshold" } ], "knowledge_gaps": [ { "name": "Gap 1", "statement": "Independent clinical-event causal evidence for habitual sauna, with repeated exposure and settings beyond the Finnish cohort family; the one independent non-Finnish cohort found concerns hot-water bathing, not sauna.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 2", "statement": "Whether BP/vascular/autonomic changes mediate events rather than simply coexist with exposure.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 3", "statement": "Sauna-alone versus exercise-plus-sauna and modality equivalence without substituting water immersion, infrared Waon or local heating.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 4", "statement": "Durable cold-health endpoints and indication-specific recovery/adaptation tradeoffs, with measured expectancy and adherence.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 5", "statement": "Exact consumer-device identity and indication-specific active-sham evidence; implanted, cervical and auricular stimulation cannot be interchanged by label.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 6", "statement": "Longer-term benefit-harm data in predefined disease and medication strata without converting supervised short tolerability into universal safety.", "relevance": "Limits mechanism identification or scope." } ], "review_metadata": { "review_date": "2026-10-13", "reviewer": "Sol 6.1", "evidence_base_note": "59 primary reports (57 at the 2026-10-13 cutoff; refs 58-59 added 2026-11-02 under adversarial finding S5); literature cutoff 2026-10-13; source examination UTC date 2026-10-13; bounded critical review, not exhaustive systematic review.", "literature_tools_available": true, "literature_tools_note": "Life Sciences Literature PubMed/Entrez, separately logged public original-body retrieval, and Consensus Pro browser searches. Provider output retained as observed browser text with citation-link mappings, or as previously exported connector documents where present. AI synthesis is not primary full-text verification. Consensus retrieved/included counts are not examined-primary counts. Scite monthly limit was reached earlier in this session; no new Scite query or incoming citation-context audit is claimed for these cases. Tool receipts record actual use. Supplementary discovery outputs do not earn primary-count credit. No independent blinded review.", "skill_version": "5.3", "validator_run": "PASS: exact archived HSEF v5.3 validator rerun after final sealing.", "validator_warnings_addressed": "No warnings.", "limits": "Bounded source-based critical review; no complete-paper/supplement audit, independent scientific peer review or blinded calibration. Revision cases retain original prose outside the three framework output blocks and have explicit correction logs.", "reviewer_note": "Sol 6.1 run in Codex: earlier provenance records that say 'Codex' (generated_by, codex-correction-provenance.json) name the same authoring run (deliverables/OPEN_ISSUES_2026-10-16.md: 'Codex ran Sol 6.1'). Reconciled 2026-11-02 under adversarial finding S8.", "adversarial_review": [ { "reviewer": "Claude Opus 5.5 (Anthropic)", "date": "2026-10-14", "findings": "A1-A3", "status": "Approved as revised" }, { "reviewer": "Claude Opus 5.5 (Anthropic)", "date": "2026-11-02", "findings": "S1-S9", "status": "Approved as revised", "record": "ADVERSARIAL_REVIEW.sauna-cardiovascular-prevention.md; adversarial-findings.sauna-cardiovascular-prevention.json", "level_after": "Γ", "confidence_after": "Moderate" } ] }, "is_calibration_entry": { "value": false, "entry_role": "not_calibration", "blind_graded": null, "completed_blinded_calibration": false, "expected_band_sealed_at": "", "target_sha256": "", "target_authorship": "not applicable", "target_author_saw_review": null, "future_run_status": "not prepared", "unblinded_reason": "These topic families were selected from an editorial traffic-priority list. Selection was visible; no blind calibration or predetermined clinical verdict was preregistered." }, "upper_ladder_check": { "final_level_below_zeta": true, "equivalents_considered": [ { "kind": "mendelian_randomization", "available": false, "why_not_sufficient": "Dose-response event cohorts, measured-fitness contrasts, thermal randomization, physiological manipulation and withdrawal observations were examined. Natural exposure/withdrawal and hard-event perturbation are valid alternatives to an RCT. Overlapping Finnish cohorts share selection and confounding structures, while restricted function/physiology and subjective cold outcomes are not independent causal confirmation of fewer sauna cardiovascular events." }, { "kind": "natural_experiment", "available": true, "why_not_sufficient": "Dose-response event cohorts, measured-fitness contrasts, thermal randomization, physiological manipulation and withdrawal observations were examined. Natural exposure/withdrawal and hard-event perturbation are valid alternatives to an RCT. Overlapping Finnish cohorts share selection and confounding structures, while restricted function/physiology and subjective cold outcomes are not independent causal confirmation of fewer sauna cardiovascular events." }, { "kind": "dose_response_across_populations", "available": false, "why_not_sufficient": "Dose-response event cohorts, measured-fitness contrasts, thermal randomization, physiological manipulation and withdrawal observations were examined. Natural exposure/withdrawal and hard-event perturbation are valid alternatives to an RCT. Overlapping Finnish cohorts share selection and confounding structures, while restricted function/physiology and subjective cold outcomes are not independent causal confirmation of fewer sauna cardiovascular events." }, { "kind": "withdrawal_rechallenge", "available": false, "why_not_sufficient": "Dose-response event cohorts, measured-fitness contrasts, thermal randomization, physiological manipulation and withdrawal observations were examined. Natural exposure/withdrawal and hard-event perturbation are valid alternatives to an RCT. Overlapping Finnish cohorts share selection and confounding structures, while restricted function/physiology and subjective cold outcomes are not independent causal confirmation of fewer sauna cardiovascular events." }, { "kind": "therapeutic_perturbation_hard_endpoint", "available": false, "why_not_sufficient": "Dose-response event cohorts, measured-fitness contrasts, thermal randomization, physiological manipulation and withdrawal observations were examined. Natural exposure/withdrawal and hard-event perturbation are valid alternatives to an RCT. Overlapping Finnish cohorts share selection and confounding structures, while restricted function/physiology and subjective cold outcomes are not independent causal confirmation of fewer sauna cardiovascular events." } ], "convergence_present": false, "cap_reapplied_to_convergent_set": false }, "provenance_header": { "sources_total": 59, "claims_total": 65, "claims_verified": 65, "claims_unverified": 0, "claims_contradicted": 0, "tier_a_sources": 59, "generated_by": "Codex; HSEF v5.3", "gate_passed": true }, "claims": [ { "id": "C1", "text": "Baseline Finnish sauna frequency and duration in 2315 men were inversely associated with subsequent sudden death, fatal coronary disease and cardiovascular/all-cause mortality over decades. Self-selected exposure, mostly weekly sauna users, one baseline assessment and residual health/social confounding prevent randomized prevention inference; later KIHD reports overlap.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 1 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C2", "text": "KIHD blood-pressure/sauna interaction analysis associated frequent sauna with lower cardiovascular mortality, with limits depending on systolic-pressure threshold. Same cohort family and covariate adjustment do not isolate exposure or show reliable offsetting of established hypertension risk.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 2 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C3", "text": "A 1688-person older Finnish cohort including women associated sauna frequency/duration with lower cardiovascular mortality after physical-activity and socioeconomic adjustment. Adjustment and improved risk prediction do not eliminate healthy-user bias; setting, baseline-only exposure and overlapping KIHD recruitment constrain independent causal inference.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 3 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C4", "text": "A 2277-man cohort measured cardiorespiratory fitness and associated frequent sauna plus higher fitness with lower cardiovascular and all-cause mortality. Measuring and adjusting fitness narrows one confounder but does not randomize sauna, eliminate social/health differences or add an independent cohort to overlapping KIHD reports.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 4 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C5", "text": "A nineteen-man randomized crossover compared hot packs and Waon exposure, showing selected temperature, heart-rate and arterial-dilation responses. Acute skin/artery vasodilation and partial modality similarity do not establish clinical-event prevention or general sauna/heat interchangeability.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 5 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C6", "text": "Four-week controlled Waon treatment in forty heart-failure patients lowered oxidative markers and BNP with related hamster stress-protein changes. Within-group biomarkers and a disease-model mechanism do not prove reduced mortality/hospitalization; treatment and indication differ from broad sauna prevention.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 6 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C7", "text": "A randomized thirty-person heart-failure trial reduced Holter premature-ventricular-contraction counts and improved selected HRV/BNP measures after repeated supervised infrared sauna. Ectopy burden is a rhythm endpoint, not demonstrated fewer sudden deaths or major clinical events; small unequal arms and short follow-up limit broad prevention claims.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 7 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C8", "text": "A nine-person supervised sauna crossover reported tolerability but no significant between-group exercise-endurance or heart-failure-questionnaire benefit; only one neuroendocrine contrast was significant. Pilot size yields imprecise nulls and does not establish equivalence or safety for all heart-failure patients or temperatures.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 8 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C9", "text": "The 149-person multicenter WAON-CHF randomized trial found selected secondary NYHA/walking/cardiothoracic improvements, but the primary between-group BNP change was not significant. Primary-negative short inpatient adjunct therapy cannot be presented as an event-prevention success or transferred to unsupervised Finnish sauna.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 9 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C10", "text": "A 188-person multicenter Waon report found cardiac/BNP and symptom changes during adjunct treatment; several clinical measures improved in both groups. Many results are within-group contrasts; improvement in one group and not another is not proof of a significant treatment difference, and hard events were not established.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 10 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C11", "text": "Fifteen mild-heart-failure patients in a randomized crossover warm/cold hydrotherapy bundle had selected quality-of-life, symptom and exercise heart-rate improvements. A mixed thermal home program does not isolate cold immersion or sauna, and subjective bundle effects do not prove cardiovascular-event prevention.", "carries_number": false, "load_bearing_for": [ "SC1", "SC4" ], "source_ns": [ 11 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C12", "text": "Randomized thermal-condition experiments in sixteen adults found different heat/cold effects on cerebral CO2 responsiveness and perfusion-pressure regulation. Acute cerebrovascular physiology includes adverse-perfusion potential and cannot establish durable cardiovascular or health benefit.", "carries_number": true, "load_bearing_for": [ "SC1", "SC4" ], "source_ns": [ 12 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C13", "text": "Progressive passive hyperthermia in eight adults reduced cerebral perfusion, voluntary contraction and cortical activation; CO2 restoration partly restored motor measures. Extreme acute heat with mechanistic rescue demonstrates functional strain, not evidence that usual sauna causes harm or prevents events.", "carries_number": true, "load_bearing_for": [ "SC1" ], "source_ns": [ 13 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C14", "text": "A twenty-one-person sham-controlled disuse trial found local diathermy heating attenuated femoral vascular-function decline during immobilization. Localized muscle heating and vascular measures do not establish sauna prevention, added capillary density or reduced clinical events.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 14 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C15", "text": "Randomized heat/exercise dehydration and rehydration experiments in eight subjects found different plasma-volume restoration profiles. Acute fluid-compartment responses inform thermal strain, not durable event prevention or a sauna dosing recommendation.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 15 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C16", "text": "A twenty-two-person PAD randomized comparison of heat-plus-calisthenics and supervised exercise found walking/BP improvements in both arms without significant between-arm functional differences. No nonexercise control and different cointervention doses prevent attributing benefit solely to heat; hot-water therapy is not sauna and no event reduction was tested.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 16 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C17", "text": "A ten-person CKD randomized crossover found greater vascular responses and six-minute walking distance after a single infrared-sauna exposure than thermoneutral control. Acute pilot function and reassuring short kidney markers do not establish sustained benefit or reduced cardiovascular events.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 17 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C18", "text": "Hot-water versus thermoneutral crossover in thirteen adults with diabetes increased thermal strain but did not improve insulin sensitivity, FMD or selected cardiometabolic markers acutely. The single exposure and another heat modality constrain chronic sauna inference; null markers do not prove all heat benefits absent.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 18 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C19", "text": "A secondary analysis of forty-five randomized heating/exercise participants associated acute vascular responses with chronic changes in the same indices. Correlated responses do not prove mediation or structural remodeling; same-parent trial and proxy prediction are not clinical-event prevention.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 19 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C20", "text": "Six-week randomized local heating/sham/exercise comparison improved selected resistance-artery measures with heating but not exercise power; exercise improved power and angiogenesis. Vascular proxy benefits are not functional-training equivalence or hard-event prevention, and local heating differs from sauna.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 20 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C21", "text": "Six-week passive heat and exercise in twenty sedentary young men improved capillarization/eNOS and selected aerobic/insulin measures; heat did not reproduce mitochondrial/GLUT4 changes. Small active-comparator study with no untreated arm does not establish sauna clinical prevention or complete exercise mimicry.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 21 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C22", "text": "A twenty-four-person randomized exercise-plus-hot-water versus exercise-plus-thermoneutral trial improved BP/FMD more with heat, without extra fitness, glucose, lipid or inflammation benefit. The added thermal water intervention has specific intermediate endpoints; it does not show sauna-alone mortality benefit.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 22 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C23", "text": "Acute hot-water exposure in PAD patients and older controls increased limb perfusion/shear and transiently lowered blood pressure. Acute within-condition physiological responses are not a controlled clinical-event outcome or proof of lasting safer vascular disease trajectory.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 23 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C24", "text": "A randomized older-adult crossover found greater acute skin-microvascular changes with hot-water immersion than time-matched exercise. Skin perfusion and thermal strain measured by OCT are not long-term cardiovascular function or event prevention.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 24 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C25", "text": "The forty-seven-analyzed-participant randomized exercise-plus-sauna arm had lower systolic BP/cholesterol and higher estimated cardiorespiratory fitness than exercise alone after eight weeks. Fitness was estimated from a submaximal heart-rate test rather than directly measured maximal oxygen uptake; predominantly female sample, bundle exposure and no events limit prevention transfer.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 25 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:MATERIALS AND METHODS:paragraph0, 1:MATERIALS AND METHODS:paragraph2, 1:MATERIALS AND METHODS:paragraph5, 1:MATERIALS AND METHODS:paragraph11, 1:MATERIALS AND METHODS:paragraph14, 2:RESULTS:paragraph3, 2:RESULTS:paragraph6. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C26", "text": "An eighteen-completer uncontrolled HFpEF sauna pilot showed exercise/walking/strength and selected quality-of-life improvements, with partial loss after withdrawal. Withdrawal after an open before-after course does not isolate treatment from practice, regression or co-care; a large controlled trial was described as planned, not underway.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 26 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C27", "text": "A randomized-order twelve-person comparison found overlapping and distinct postexercise versus hot-water recovery hemodynamics. Similar acute recovery variables do not establish shared long-term causal health effects or exercise replacement.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 27 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C28", "text": "An eight-week forty-one-person randomized Finnish-sauna CAD trial achieved heat acclimation without improved FMD, arterial stiffness or blood pressure; reactive-hyperemia contrasts did not support benefit. A genuine disease-context null constrains mechanism generalization, but it does not directly test mortality or prove no possible prevention benefit.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 28 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C29", "text": "A ten-woman controlled crossover found greater thermal response with infrared sauna but no significant BP, arterial-stiffness or HRV difference versus resting or exercise conditions. Infrared thermal strain is not complete exercise mimicry; small acute nulls are imprecise and do not adjudicate long-term cardiovascular events.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 29 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C30", "text": "A sixteen-person hypertension comparison found acute vascular-resistance reductions with sauna and selected ambulatory-BP effects with exercise plus sauna. Combined exposure and brief hemodynamic follow-up do not isolate sauna-alone chronic disease or clinical-event prevention.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "source_ns": [ 30 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C31", "text": "A twelve-week randomized strength-training comparison found smaller strength/mass gains with repeated cold-water recovery than active recovery, with separate acute mechanistic findings. Male training-specific harm does not prove all cold use harmful; it directly challenges equating acute recovery or hormetic stress with durable training benefit.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 31 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C32", "text": "Randomized soccer-player cold/hot-water versus sham-laser recovery showed no superiority in acute performance recovery or fifteen-week adaptation. Young male athletes and small longer-term completer sample do not establish equivalence or all-population health outcomes.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 32 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C33", "text": "A rugby-player randomized crossover found selected creatine-kinase, inflammatory and growth-factor differences after cold/hot-water recovery. Biochemical changes and small effects do not establish performance, clinical or durable-health benefit; hydrostatic and period effects remain.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 33 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C34", "text": "Seventeen men with randomized leg cooling during strength training showed small trends toward poorer cooled-leg strength gains and retention. Key leg/interaction tests were not conventionally significant; findings should not be described as a definitive strength-harm replication or a broad health effect.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 34 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C35", "text": "An eleven-person randomized training crossover found poorer muscle-thickness adaptation with cooling and nonsignificant strength/jump contrasts with wide intervals. Small sample and carryover/washout assumptions limit precise durable effect sizes; it is not a cardiovascular or sauna-comparability test.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 35 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C36", "text": "A fourteen-man forearm training comparison found attenuated thickness and selected strength/vascular adaptation with postexercise cooling. Local muscle exposure and small allocation groups do not support a universal cold-health harm or sauna-equivalence claim.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 36 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C37", "text": "A ten-man randomized crossover found better selected submaximal work six hours after cold immersion, without enhanced maximal-function recovery. An acute performance benefit is retained but does not establish improved long-term training adaptation or durable health comparable to sauna.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 37 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C38", "text": "A sixty-man randomized soreness study found lower pain with cold recovery but no benefit in most functional or muscle-damage measures. Unblinded symptom relief is distinct from functional recovery and cannot establish durable clinical benefit.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 38 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C39", "text": "A volleyball-athlete randomized crossover showed selected perceptions and small performance-treatment effects across immersion conditions, with no significant intervention-by-time interactions. Within-condition and main effects should not be inflated into clear between-treatment adaptation benefits; short follow-up and variability constrain transfer.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 39 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C40", "text": "The 3018-person unblinded cold-shower trial reduced self-reported sickness absence by29 percent but not overall illness days; original Methods confirm self-report and retrospective registration before analysis. Work attendance is not fewer infections or cardiovascular benefit; no sauna comparison, blinding or verified adherence establishes durable comparable health effects, and the linked correction adds omitted underlying Table 2 data without an asserted endpoint revision.", "carries_number": true, "load_bearing_for": [ "SC4" ], "source_ns": [ 40 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 1:Methods:paragraph0, 1:Methods:paragraph1, 1:Methods:paragraph3, 1:Methods:paragraph4, 1:Methods:paragraph10, 2:Results:paragraph0, 2:Results:paragraph1, 2:Results:paragraph2, 2:Results:paragraph4, 2:Results:paragraph20. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C41", "text": "A seventy-two-person sham-controlled auricular-stimulation insomnia trial improved PSQI beyond sham over eight weeks with sustained symptom findings. A defined clinical symptom trial does not establish every consumer device or implanted-VNS equivalence; sensation matching, allocation guessing and objective sleep/function require separate checks.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 41 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C42", "text": "A twenty-six-woman sham-controlled POTS trial reduced measured postural tachycardia with defined tragus stimulation over two months. A specific disease/device exposure and physiological endpoint do not establish broad consumer wellness claims or eliminate mediation alternatives.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 42 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C43", "text": "A small controlled MCI trial favored auricular stimulation on selected cognitive scores after twenty-four weeks. Cognitive-score changes and many within-arm secondary contrasts do not prove prevention of dementia or clinical equivalence across devices.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 43 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C44", "text": "An eighty-patient poststroke-depression report favored adjunct taVNS on symptom/function measures and biomarkers. Abstract describes double-blind sham design but also conventional-treatment-only controls; comparator credibility requires body verification before a firm causal threshold, and biomarkers do not isolate mediation.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 44 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C45", "text": "A forty-person single-blind IBS-C trial favored defined taVNS on bowel/symptom and rectal measures alongside multiomics changes. Small single-center multiple endpoints and observed mediator correlations do not establish a universal vagal mechanism or consumer-device equivalence.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 45 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C46", "text": "A forty-person sham-controlled insomnia study favored taVNS on symptom scores and selected wearable-derived sleep/QoL outcomes. Small modified-intention-to-treat study and consumer wearable measures do not validate all brands or objectively confirm sleep physiology; abstract numerical signs/units need body checking before carrying precise estimates.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 46 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C47", "text": "The 53-person TREAT-AF trial used a named home Parasym device with tragus versus earlobe stimulation and blinded outcome assessors; ECG-patch AF burden was lower at six months. This is a genuine specific-device/indication positive, not proof every consumer stimulation reproduces implanted benefits or prevents stroke/death; intermittent ECG windows and small sample remain.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 47 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. Selected body sections: 0:Methods:paragraph0, 0:Methods:paragraph1, 0:Methods:paragraph2, 0:Methods:paragraph3, 0:Methods:paragraph6, 0:Methods:paragraph7, 1:Results:paragraph0, 1:Results:paragraph1, 1:Results:paragraph2, 1:Results:paragraph3, 1:Results:paragraph6. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C48", "text": "A three-hundred-person randomized functional-dyspepsia trial favored defined 10/25 Hz taVNS on prespecified symptom response and adequate relief versus sham. Specific dose/site and diagnosed symptoms cannot be transferred to all products, diseases or cardiovascular-event prevention; blinding integrity remains separate from randomized labeling.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 48 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C49", "text": "An eighteen-person sham-controlled lupus pilot improved selected pain/fatigue/joint scores but most inflammatory mediators did not change. Small short symptom benefit does not establish a general anti-inflammatory mechanism or device-class equivalence; a linked correction remains attached.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 49 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C50", "text": "A sixty-eight-person knee-osteoarthritis taVNS/sham trial reported selected pain/functional improvements, largely as within-group contrasts. Significance within active but not sham arms is not a demonstrated between-arm treatment difference; device and indication transfer remain unestablished.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 50 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C51", "text": "The 116-person multicenter RELAX trial found greater seven-day pain reduction with taVNS plus pregabalin than sham plus pregabalin. Adjunct short pain relief in cancer survivors does not establish standalone long-term consumer efficacy or isolate the proposed vagal mediator.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 51 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C52", "text": "A thirty-six-person blinded stroke-thrombectomy trial did not change its primary 24-hour systolic-pressure-variability outcome despite molecular/HRV changes. Safety/feasibility and gene effects are not success on the primary endpoint or proof of a durable neurological/device benefit.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 52 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C53", "text": "A secondary randomized-diabetes analysis found no active-versus-sham inflammatory-cytokine effect over short and longer stimulation periods. Same-parent NCT04143269 evidence is not a new independent clinical trial; a near-significant subgroup trend does not reverse the whole-sample null.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 53 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C54", "text": "A 145-randomized-person multicenter cervical-stimulation diabetes trial found no greater gastrointestinal symptom reduction than sham over either period. A defined null constrains broad device/mechanism transfer but does not negate successes in different indications; gastric-emptying change did not establish symptom benefit.", "carries_number": true, "load_bearing_for": [ "SC5" ], "source_ns": [ 54 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C55", "text": "A fifteen-person sham-controlled motion-sickness pilot found selected EEG and symptom-score effects. Small acute symptom and EEG findings do not establish chemotherapy efficacy, broad durable health benefit or equivalence to established medical stimulation.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 55 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C56", "text": "A randomized insomnia study favored real taVNS on symptom scales and related fMRI connectivity, with exploratory independently tested prediction. Connectivity correlation/prediction is not mediator manipulation or necessity; it does not establish all-device equivalence or durable functional recovery.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 56 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C57", "text": "In 129 NYHA III/IV heart-failure patients, 64 supervised Waon recipients and 65 age/gender/NYHA-matched traditional-care controls had five-year HF or cardiac-death composite rates 31.3% versus 68.7%; deaths were eight versus twelve. No random allocation stated; matched advanced-HF adjunct treatment with continued postdischarge exposure is not habitual sauna primary prevention. Selection, co-care and composite components remain unresolved; deaths alone do not establish isolated mortality reduction.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 57 ], "verification": "verified", "verified_against": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC1", "text": "Controlled human heat studies establish real physiological responses. Their Γ assignment here concerns the prevention-mechanism inference: blood pressure, flow, thermal acclimation and other intermediate changes are not proof of fewer hard cardiovascular events. Positive walking/function studies retain their specific clinical context; the physiological phenomenon itself is not denied.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC2", "text": "The Finnish event cohorts show persuasive prospective inverse associations, and a matched 129-patient severe-heart-failure Waon cohort reports fewer five-year HF/cardiac-death composite events. Neither source establishes random allocation or an independent causal instrument; supervised adjunct therapy is also distinct from habitual sauna primary prevention. Randomized thermal trials address short-term risk factors, ectopy or function with meaningful positive and null results. No independently valid same-scope sauna hard-event causal experiment was verified; Γ captures mechanism/partial intervention support.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 1, 2, 3, 4, 6, 7, 8, 9, 10, 16, 17, 18, 20, 21, 22, 25, 26, 28, 30, 57 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC3", "text": "Measured fitness and socioeconomic adjustment reduce selected explanations but do not eliminate unmeasured healthy-user, prior-disease, social and exposure-selection effects. A joint-association analysis of overlapping participants is not an independent instrument; confounding independence remains unestablished at Β.", "carries_number": false, "load_bearing_for": [ "SC3" ], "source_ns": [ 1, 2, 3, 4, 57 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC4", "text": "Cold has specific acute performance/symptom results and an unblinded self-reported sickness-absence positive, alongside training-adaptation harm and placebo-null findings. None establishes durable cardiovascular or overall health benefit comparable with sauna. Γ retains partial intervention support without extrapolating absence from nonsignificance.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 11, 12, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC5", "text": "Defined noninvasive devices can have genuine clinical effects, including home Parasym stimulation with objective AF-burden benefit. That disproves a blanket claim that auricular devices have no controlled evidence. Yet exact product, site, current, indication and comparator cannot be transferred across all consumer products or equated with implanted medical stimulation; the broad equivalence inference remains Γ.", "carries_number": false, "load_bearing_for": [ "SC5" ], "source_ns": [ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CH", "text": "Sauna changes cardiovascular physiology and may improve selected clinical function, but the evidence does not yet establish that habitual sauna itself prevents hard cardiovascular events across adults.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 1, 3, 9, 25, 28, 57 ], "verification": "verified", "verified_against": "Bounded synthesis of examined sources; score is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "C58", "text": "Baseline sauna frequency in 1628 KIHD men and women without prior stroke was inversely associated with 155 incident strokes over a median 14.9 years; HR 0.38 (0.18-0.81) for 4-7 versus 1 session per week after risk-factor, physical-activity and socioeconomic adjustment. Self-selected baseline exposure in the same KIHD cohort family as refs 1-4; adds an incident (non-mortality) endpoint, not an independent cohort or causal allocation. PubMed indexes the article type as Editorial although the abstract reports a prospective cohort.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 58 ], "verification": "verified", "verified_against": "Bounded original primary abstract and PubMed metadata examined via PubMed get_article_metadata on 2026-11-02 (added under adversarial finding S5); no complete-paper or supplement audit claimed.", "verified_on": "2026-11-02", "note": "Added under adversarial finding S5; does not change any level." }, { "id": "C59", "text": "In 30,076 Japanese adults aged 40-59 without CVD or cancer, almost-daily tub bathing versus 0-2 times per week was associated with lower incident CVD (HR 0.72, 0.62-0.84), CHD and total stroke over 538,373 person-years; no association with sudden cardiac death. Hot-water tub bathing, not sauna; observational with self-reported baseline bathing frequency and residual confounding. Bears on geographic replication of the heat-exposure association, not on sauna causation.", "carries_number": true, "load_bearing_for": [ "SC2", "SC3" ], "source_ns": [ 59 ], "verification": "verified", "verified_against": "Bounded original primary abstract and PubMed metadata examined via PubMed get_article_metadata on 2026-11-02 (added under adversarial finding S5); no complete-paper or supplement audit claimed.", "verified_on": "2026-11-02", "note": "Added under adversarial finding S5; does not change any level." } ], "citation_ledger": [ { "n": 1, "citation": "Laukkanen T, Khan H, Zaccardi F et al. Association between sauna bathing and fatal cardiovascular and all-cause mortality events. JAMA internal medicine. 2015.", "tier": "A", "kind": "primary", "pmid": "25705824", "doi": "10.1001/jamainternmed.2014.8187", "url": "https://pubmed.ncbi.nlm.nih.gov/25705824/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-original-men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C1", "CSC2", "CSC3", "CH" ] }, { "n": 2, "citation": "Laukkanen JA, Jae SY, Kauhanen J et al. The Interplay between Systolic Blood Pressure, Sauna Bathing, and Cardiovascular Mortality in Middle-Aged and Older Finnish Men: A Cohort Study. The journal of nutrition, health & aging. 2023.", "tier": "A", "kind": "primary", "pmid": "37248758", "doi": "10.1007/s12603-023-1895-1", "url": "https://pubmed.ncbi.nlm.nih.gov/37248758/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-original-men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C2", "CSC2", "CSC3" ] }, { "n": 3, "citation": "Laukkanen T, Kunutsor SK, Khan H et al. Sauna bathing is associated with reduced cardiovascular mortality and improves risk prediction in men and women: a prospective cohort study. BMC medicine. 2018.", "tier": "A", "kind": "primary", "pmid": "30486813", "doi": "10.1186/s12916-018-1198-0", "url": "https://pubmed.ncbi.nlm.nih.gov/30486813/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-later-older-men-and-women", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C3", "CSC2", "CSC3", "CH" ] }, { "n": 4, "citation": "Kunutsor SK, Khan H, Laukkanen T et al. Joint associations of sauna bathing and cardiorespiratory fitness on cardiovascular and all-cause mortality risk: a long-term prospective cohort study. Annals of medicine. 2018.", "tier": "A", "kind": "primary", "pmid": "28972808", "doi": "10.1080/07853890.2017.1387927", "url": "https://pubmed.ncbi.nlm.nih.gov/28972808/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "KIHD-original-men", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C4", "CSC2", "CSC3" ] }, { "n": 5, "citation": "Kominami K, Noda K, Takahashi N et al. Cardiovascular reactions for whole-body thermal therapy with a hot pack and Waon therapy. International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group. 2020.", "tier": "A", "kind": "rct", "pmid": "32046537", "doi": "10.1080/02656736.2020.1723719", "url": "https://pubmed.ncbi.nlm.nih.gov/32046537/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID32046537", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C5", "CSC1" ] }, { "n": 6, "citation": "Fujita S, Ikeda Y, Miyata M et al. Effect of Waon therapy on oxidative stress in chronic heart failure. Circulation journal : official journal of the Japanese Circulation Society. 2011.", "tier": "A", "kind": "rct", "pmid": "21173495", "doi": "10.1253/circj.cj-10-0630", "url": "https://pubmed.ncbi.nlm.nih.gov/21173495/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID21173495", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C6", "CSC1", "CSC2" ] }, { "n": 7, "citation": "Kihara T, Biro S, Ikeda Y et al. Effects of repeated sauna treatment on ventricular arrhythmias in patients with chronic heart failure. Circulation journal : official journal of the Japanese Circulation Society. 2004.", "tier": "A", "kind": "rct", "pmid": "15564698", "doi": "10.1253/circj.68.1146", "url": "https://pubmed.ncbi.nlm.nih.gov/15564698/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID15564698", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C7", "CSC1", "CSC2" ] }, { "n": 8, "citation": "Basford JR, Oh JK, Allison TG et al. Safety, acceptance, and physiologic effects of sauna bathing in people with chronic heart failure: a pilot report. Archives of physical medicine and rehabilitation. 2009.", "tier": "A", "kind": "rct", "pmid": "19154844", "doi": "10.1016/j.apmr.2008.06.029", "url": "https://pubmed.ncbi.nlm.nih.gov/19154844/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID19154844", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C8", "CSC1", "CSC2" ] }, { "n": 9, "citation": "Tei C, Imamura T, Kinugawa K et al. Waon Therapy for Managing Chronic Heart Failure　- Results From a Multicenter Prospective Randomized WAON-CHF Study. Circulation journal : official journal of the Japanese Circulation Society. 2016.", "tier": "A", "kind": "rct", "pmid": "27001189", "doi": "10.1253/circj.CJ-16-0051", "url": "https://pubmed.ncbi.nlm.nih.gov/27001189/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID27001189", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C9", "CSC1", "CSC2", "CH" ] }, { "n": 10, "citation": "Miyata M, Kihara T, Kubozono T et al. Beneficial effects of Waon therapy on patients with chronic heart failure: results of a prospective multicenter study. Journal of cardiology. 2008.", "tier": "A", "kind": "rct", "pmid": "18922381", "doi": "10.1016/j.jjcc.2008.07.009", "url": "https://pubmed.ncbi.nlm.nih.gov/18922381/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18922381", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C10", "CSC1", "CSC2" ] }, { "n": 11, "citation": "Michalsen A, Lüdtke R, Bühring M et al. Thermal hydrotherapy improves quality of life and hemodynamic function in patients with chronic heart failure. American heart journal. 2003.", "tier": "A", "kind": "rct", "pmid": "14564334", "doi": "10.1016/S0002-8703(03)00314-4", "url": "https://pubmed.ncbi.nlm.nih.gov/14564334/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID14564334", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. No complete-paper or supplement audit claimed.", "carries_claims": [ "C11", "CSC1", "CSC4" ] }, { "n": 12, "citation": "Skinner BD, Lucas RAI, Lucas SJE. Exposure to passive heat and cold stress differentially modulates cerebrovascular-CO2 responsiveness. 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These are prospective observed events, not randomized sauna prevention. Reference groups are predominantly different sauna frequencies, rather than a representative no-sauna population; repeated papers cannot multiply independent exposure allocation.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/25705824/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-0-10-10000.json" ], "body_receipts": [] }, { "pmid": "28972808", "doi": "10.1080/07853890.2017.1387927", "source_type": "primary study report", "study_group": "KIHD-original-men", "access_depth": "abstract_metadata", "consensus_aspect": "Fitness adjustment and study independence", "result_comparison": "Consensus correctly highlights measured fitness and cohort overlap. The original joint-analysis associations strengthen a confounder-specific check but reuse the KIHD male cohort family. Baseline gas-analyzed fitness and statistical adjustment do not make sauna exposure randomized or eliminate every health/social selection process.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/28972808/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-0-10-10000.json" ], "body_receipts": [] }, { "pmid": "27001189", "doi": "10.1253/circj.CJ-16-0051", "source_type": "primary study report", "study_group": "PMID27001189", "access_depth": "abstract_metadata", "consensus_aspect": "WAON-CHF endpoint hierarchy", "result_comparison": "Consensus summarizes review-mediated BNP decreases and function gains without visibly retaining the requested original trial primary-null distinction. The original 149-person randomized report designates pre/post BNP ratio as primary; its between-group BNP change did not reach significance while selected NYHA/6MWD/cardiothoracic secondary outcomes improved. Primary and secondary results remain separately reported, and no broad event prevention follows.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/27001189/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-0-10-10000.json" ], "body_receipts": [] }, { "pmid": "35785965", "doi": "10.1152/ajpregu.00076.2022", "source_type": "primary study report", "study_group": "PMID35785965", "access_depth": "full_text_partial", "consensus_aspect": "Added sauna effect and fitness measurement", "result_comparison": "Consensus correctly identifies an eight-week added-sauna systolic-pressure and fitness estimate over exercise alone. Original Methods show 48 enrolled/47 analyzed, most participants women, and estimated VO2max from a submaximal heart-rate test. Thus the real positive is retained, with estimated rather than directly gas-measured fitness and no hard-event endpoint.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/35785965/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-20-30-10000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\body-presentation-receipts\\35785965-s1-p0-2-5-11-14.json", "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\body-presentation-receipts\\35785965-s2-p3-6.json" ] }, { "pmid": "37650138", "doi": "10.1152/japplphysiol.00322.2023", "source_type": "primary study report", "study_group": "PMID37650138", "access_depth": "abstract_metadata", "consensus_aspect": "CAD acclimation versus vascular outcomes", "result_comparison": "Consensus accurately notes the 41-person CAD randomized null for FMD, stiffness and BP despite acclimation. The result constrains vascular mechanism generalization; it does not directly demonstrate zero mortality benefit. A separate review-mediated93 percent ischemia claim was not verified against an original and is excluded from our numeric evidence cards.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/37650138/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-20-30-10000.json" ], "body_receipts": [] }, { "pmid": "27631616", "doi": "10.1371/journal.pone.0161749", "source_type": "primary study report", "study_group": "PMID27631616", "access_depth": "full_text_partial", "consensus_aspect": "Sickness absence versus illness days, control and correction", "result_comparison": "Consensus describes reduced absence despite zero change in actual illness days. Original Methods establish unblinded self-reported outcomes and unverified compliance; Results report no significant overall illness-day group effect, rather than exact zero or objective infection surveillance. Sickness absence IRR 0.71 is retained. The examined original correction adds omitted underlying Table 2 data, not a revised outcome or retraction.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/27631616/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-30-40-10000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\body-presentation-receipts\\27631616-s1-p0-1-3-4-10.json", "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\body-presentation-receipts\\27631616-s2-p0-1-2-4-20.json" ] }, { "pmid": "26174323", "doi": "10.1113/JP270570", "source_type": "primary study report", "study_group": "PMID26174323", "access_depth": "abstract_metadata", "consensus_aspect": "Acute recovery versus chronic training adaptation", "result_comparison": "Consensus notes attenuated resistance adaptation after cold recovery. The original reports a 21-man twelve-week training experiment and a separate nine-man acute biopsy experiment. Smaller strength/mass gains with repeated cold are a genuine training-context boundary; a separate acute submaximal recovery positive25121612 is not discarded or converted into durable health.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/26174323/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-30-40-10000.json" ], "body_receipts": [] }, { "pmid": "32192678", "doi": "10.1016/j.jacep.2019.11.008", "source_type": "primary study report", "study_group": "PMID32192678", "access_depth": "full_text_partial", "consensus_aspect": "Auricular consumer-style devices and genuine controlled evidence", "result_comparison": "Consensus categorically contrasts validated clinical cervical/implanted paths with consumer auricular devices lacking comparable sham-controlled evidence. OriginalTREAT-AF Methods name a home Parasym device, stimulated tragus versus stimulated earlobe, blinded outcome assessors and ECG-patch AF-burden primary measurement. Its 53-person positive contradicts a blanket no-evidence assertion for every auricular/home device, while not establishing all-brand or implanted-equivalence claims.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/32192678/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-40-48-10000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\body-presentation-receipts\\32192678-s0-p0-1-2-3-6-7.json", "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\body-presentation-receipts\\32192678-s1-p0-1-2-3-6.json" ] }, { "pmid": "38546822", "doi": "10.1007/s00125-024-06129-0", "source_type": "primary study report", "study_group": "NCT04143269", "access_depth": "abstract_metadata", "consensus_aspect": "Disease-specific null and secondary report overlap", "result_comparison": "Consensus coverage cells report no vagal literature in several domains; such retrieval gaps are not literature absence. The original multicenter cervical-diabetes trial had no active-sham gastrointestinal symptom superiority, and cytokine-null39251831 is a secondary NCT04143269 analysis. Defined negative and positive trials should coexist rather than be generalized by device label.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/38546822/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-48-56-10000.json" ], "body_receipts": [] }, { "pmid": "19304125", "doi": "10.1016/j.jjcc.2008.11.005", "source_type": "primary study report", "study_group": "PMID19304125", "access_depth": "abstract_metadata", "consensus_aspect": "Five-year Waon hard events and absolute versus relative effect", "result_comparison": "Consensus cites a review-mediated 38% reduction in cardiac events over five years. The verified original reports HF/cardiac-death composite rates 68.7% in 65 matched traditional-care controls versus 31.3% in 64 Waon recipients: a 37.4 percentage-point difference, not an unambiguously stated 38% relative reduction. The study reports matching, without stated random allocation, in NYHA III/IV heart failure; deaths were twelve versus eight. We retain this clinically important event association without treating it as a mortality-prevention RCT or ordinary-sauna primary prevention.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/19304125/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\examinations\\original-56-57-10000.json" ], "body_receipts": [] } ], "grade_changed": false, "grade_change_note": "Source-based adjudication; no independent blinded regrade claimed.", "raw_receipts": [ { "path": "deliverables\\hsef_v53_traffic_ranks_11_15_2026-10-13\\sauna-cardiovascular-prevention\\consensus-browser-2026-10-13.json", "sha256": "4baa1b44d272a5bfee4f8804a2cc99c00196a6286b38e37bb25e15fd2d79143c" } ], "independent_blinded_audit": false, "cutoff": "2026-10-13", "completed_utc": "2026-10-13T17:02:53.527325+00:00", "conclusion": "Endpoint hierarchy, experimental scope and original-source limits determine the evidence cards; provider wording does not override them." } }