{ "$schema_version": "5.3", "review_mode": "fresh", "claim_restatement": { "index_wording": "Shingles vaccination causally reduces incident dementia in older adults.", "entry_form": "claim", "gradeable_restatement": "Shingles vaccination causally reduces incident dementia in older adults.", "restatement_required": true, "split_into": [], "parent_claim": null, "scope_qualifiers": [ { "qualifier": "Birth date, product availability, baseline dementia-free state and follow-up determined before outcomes", "determinable_before_outcome": true, "determined_from": "Enrollment and experimental design, before results; no responder-defined scope.", "action": "retained" } ] }, "hypothesis": { "name": "Shingles Vaccination and Dementia Prevention", "central_claim": "Shingles vaccination causally reduces incident dementia in older adults.", "proposed_mechanism": "Shingles vaccination causally reduces incident dementia in older adults.", "claimed_scope": "Baseline dementia-free older adults near verified live-zoster vaccine eligibility cutoffs; recorded incident dementia over 5.5–7.4 years, with recombinant-product extension assessed separately", "claimed_level": [ "initiation", "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": "01-neurodegeneration.md", "secondary_rubrics": [ "05-immunology-inflammation.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": "Frozen01-neurodegeneration focuses on disease-mechanism perturbation. This registered preventive clinical claim uses a declared field-equivalent: a validated eligibility natural experiment with a clinically relevant incident-dementia endpoint and checked assignment assumptions. It is not literal laboratory removal of a protein. All frozen criterion text is retained; assay biomarkers and cell AD-like phenotypes cannot replace clinical dementia, and observational associations remain Β. Secondary immunology routing is considered for mediator questions, not used to borrow vaccine-class efficacy." }, "subclaim_matrix": { "subclaims": [ { "id": "SC1", "statement": "Shingles vaccination precedes a lower incidence of dementia.", "subclaim_type": "existence", "scope": "Baseline age, vaccine product, eligibility and dementia-free state", "claimed_scope": "Baseline age, vaccine product, eligibility and dementia-free state", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Prospective and linked-record vaccination cohorts", "hsef_level": "Β", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Vaccination precedes lower recorded dementia incidence in multiple ordinary cohorts. These descriptive associations retain Β; larger samples and extensive adjustment alone do not create causal assignment." }, { "id": "SC2", "statement": "Shingles vaccination causally reduces dementia incidence.", "subclaim_type": "sufficiency", "scope": "Baseline dementia-free older adults; age eligibility and follow-up fixed", "claimed_scope": "Baseline dementia-free older adults; age eligibility and follow-up fixed", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Valid eligibility natural experiments and direct trials", "hsef_level": "Δ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "The Welsh fuzzy eligibility discontinuity provides a positive local clinical causal-inference crossing, with strong first-stage uptake and baseline/placebo checks. Australian and Canadian eligibility analyses corroborate diagnosis differences but differ in receipt-effect identification and uptake precision. A 2026 quantitative challenge reports implausible implied effects outside Wales and deserves direct resolution. Δ is awarded for a restricted field-valid natural experiment, with Moderate confidence and no assertion of product-wide randomized confirmation.", "rubric_adaptation": "Age eligibility is an exogenous treatment-encouragement perturbation. Continuity/exclusion/monotonicity and uptake establish the local clinical causal equivalent; recorded diagnoses remain distinct from biological onset." }, { "id": "SC3", "statement": "Herpes-zoster prevention is the necessary mediator of the dementia effect.", "subclaim_type": "mechanism", "scope": "Vaccine effect dissociated from infection and immune mechanisms", "claimed_scope": "Vaccine effect dissociated from infection and immune mechanisms", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Mediator-specific or product-comparison evidence", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Clinical and subclinical VZV suppression, heterologous immune effects and healthcare pathways remain plausible. Infection cohorts conflict; neural-culture reactivation and vaccine-waning correlations do not independently isolate the necessary mediator. Same-uptake sex differences and observational AS01 comparisons do not prove an exclusive pathway." }, { "id": "SC4", "statement": "Repurposed drugs and other vaccinations reproduce the same preventive dementia effect.", "subclaim_type": "generalization", "scope": "Exact agent, baseline eligibility and clinically diagnosed outcome", "claimed_scope": "Exact agent, baseline eligibility and clinically diagnosed outcome", "governing_rubric": "01-neurodegeneration.md", "key_evidence_anchor": "Independent drug-specific causal tests", "hsef_level": "Γ", "confidence": "Moderate", "governing_cap_or_threshold": "Quoted boundary and upward audit below.", "rationale": "Other vaccines and repurposed drugs have agent-specific evidence, not a uniform reproduction of the zoster effect. The randomized Chinese hypertension-care programme and borderline SystEur positive retain clinical benefit in their own scopes; SPRINT probable dementia, HYVET, aspirin and GRADE cognitive outcomes include nulls. The conjunctive class transfer remains Γ, without downgrading those separate successes.", "rubric_adaptation": "Exact drug/vaccine, clinical baseline and diagnosed endpoint require agent-specific attribution. Genuine hypertension-package prevention is preserved separately from generic class equivalence." } ], "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": "The preregistered primary-subclaim rule returns Δ from SC2: the strongest evidence is a positive local age-eligibility natural experiment for live-zoster vaccination and recorded dementia, with international eligibility corroboration. Multiple related discontinuity analyses do not automatically supply independently failing causal modalities. Receipt-effect assumptions, a quantitative 2026 critique, diagnosis ascertainment, product transfer and exploratory sex boundaries prevent a higher grade. Weakest-link returns Β; primary and scope-matched return Δ. This is stronger than an ordinary association but remains a bounded causal-inference judgment rather than completed randomized dementia-prevention proof.", "aggregation_alternatives": { "weakest_link_would_return": "Β", "primary_subclaim_would_return": "Δ", "scope_matched_would_return": "Δ", "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": "M 1", "is_nominal": true, "name": "Local vaccine effect on dementia diagnosis", "core_claim": "Live-zoster vaccination can prevent or delay recorded dementia in the local eligibility setting.", "explains_what_nominal_does_not": "Live-zoster vaccination can prevent or delay recorded dementia in the local eligibility setting.", "strongest_supporting_evidence": [ "Welsh exogenous birth-date uptake jump and positive clinical outcome, with international eligibility corroboration." ], "strongest_contradictory_evidence": [ "Quantitative critique PMID42754179 and product/age/diagnosis limits require prospective resolution." ], "hsef_level_for_this_model": "Δ", "rationale": "Welsh exogenous birth-date uptake jump and positive clinical outcome, with international eligibility corroboration. Quantitative critique PMID42754179 and product/age/diagnosis limits require prospective resolution." }, { "rank_in_tournament": 2, "model_id": "M 2", "is_nominal": false, "name": "Health selection and ascertainment", "core_claim": "Healthy-vaccinee and prodromal-dementia selection generate some ordinary cohort associations.", "explains_what_nominal_does_not": "Healthy-vaccinee and prodromal-dementia selection generate some ordinary cohort associations.", "strongest_supporting_evidence": [ "Welsh ordinary cohorts show broad disease/mortality associations PMID35434253; RZV nursing-emulation negative controls PMID42296498 retain residual confounding; uptake disparity PMID41435736 supplies a concrete selection path." ], "strongest_contradictory_evidence": [ "Baseline balance and exact-date placebos make simple smooth health selection a weaker explanation of the local Welsh discontinuity." ], "hsef_level_for_this_model": "Β", "rationale": "Welsh ordinary cohorts show broad disease/mortality associations PMID35434253; RZV nursing-emulation negative controls PMID42296498 retain residual confounding; uptake disparity PMID41435736 supplies a concrete selection path. Baseline balance and exact-date placebos make simple smooth health selection a weaker explanation of the local Welsh discontinuity." }, { "rank_in_tournament": 3, "model_id": "M 3", "is_nominal": false, "name": "Infection suppression and immune modulation", "core_claim": "VZV suppression and nonspecific immune effects may both mediate a genuine vaccine benefit.", "explains_what_nominal_does_not": "VZV suppression and nonspecific immune effects may both mediate a genuine vaccine benefit.", "strongest_supporting_evidence": [ "Waning/dose infection correlations PMID41053450, neural culture PMID35754275 and AS01 vaccine comparisons PMID40562756 are compatible." ], "strongest_contradictory_evidence": [ "Conflicting overt-HZ cohorts and absent mediator dissociation prevent necessity or exclusive adjuvant proof." ], "hsef_level_for_this_model": "Γ", "rationale": "Waning/dose infection correlations PMID41053450, neural culture PMID35754275 and AS01 vaccine comparisons PMID40562756 are compatible. Conflicting overt-HZ cohorts and absent mediator dissociation prevent necessity or exclusive adjuvant proof." } ], "tournament_summary": "Descriptive comparison; does not modify the nominal score. The Welsh eligibility comparison PMID40175543 is the strongest separator between a local vaccine effect and ordinary healthy-user selection because nearly identical birth dates sharply change uptake. It does not eliminate every cutoff-specific intervention or determine receipt effect without instrumental-variable assumptions. The quantitative critique PMID42754179 supplies an essential independent analytical challenge.", "study_separating_rank1_from_rank2": "The Welsh eligibility comparison PMID40175543 is the strongest separator between a local vaccine effect and ordinary healthy-user selection because nearly identical birth dates sharply change uptake. It does not eliminate every cutoff-specific intervention or determine receipt effect without instrumental-variable assumptions. The quantitative critique PMID42754179 supplies an essential independent analytical challenge.", "nominal_wins_only_by_funding_artifact": false, "level_unchanged_by_tournament": true }, "evidence_inventory": [ { "n": 1, "pmid": "40175543", "title": "A natural experiment on the effect of herpes zoster vaccination on dementia.", "citation": "Eyting M, Xie M, Michalik F et al. A natural experiment on the effect of herpes zoster vaccination on dementia. Nature. 2025.", "doi": "10.1038/s41586-025-08800-x", "pmcid": "PMC12058522", "url": "https://pubmed.ncbi.nlm.nih.gov/40175543/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40175543/", "tier": "A", "source_tier": "A", "kind": "natural_experiment", "status_flags": [ "UpdateOf: PMID37292746" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Welsh_eligibility_SAIL", "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: 6:Explorations of the effect mechanism:paragraph4, 6:Explorations of the effect mechanism:paragraph8, 6:Explorations of the effect mechanism:paragraph10, 6:Explorations of the effect mechanism:paragraph12, 8:Methods:paragraph6, 8:Methods:paragraph7, 8:Methods:paragraph8, 8:Methods:paragraph12, 8:Methods:paragraph14, 8:Methods:paragraph15. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC3" ], "favors_models": [], "evidence_class": "High", "system": "natural experiment", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "Welsh birth-date eligibility discontinuity identifies a local live-vaccine effect on new dementia diagnosis: reported receipt effect 3.5 percentage points over 7 years.", "what_it_does_not_show": "CACE requires continuity, exclusion and monotonicity; diagnoses are not biological onset, age-near 80/product-specific and exploratory mediation is not necessity.", "confounders_present": [ "CACE requires continuity, exclusion and monotonicity; diagnoses are not biological onset, age-near 80/product-specific and exploratory mediation is not necessity." ], "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": 2, "pmid": "41579903", "title": "Herpes zoster vaccination and incident dementia in Canada: an analysis of natural experiments.", "citation": "Pomirchy M, Chung S, Bommer C et al. Herpes zoster vaccination and incident dementia in Canada: an analysis of natural experiments. The Lancet. Neurology. 2026.", "doi": "10.1016/S1474-4422(25)00455-7", "pmcid": "PMC13101831", "url": "https://pubmed.ncbi.nlm.nih.gov/41579903/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41579903/", "tier": "A", "source_tier": "A", "kind": "natural_experiment", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Canadian_CPCSSN_CHSS", "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:paragraph2, 1:Methods:paragraph4, 1:Methods:paragraph5, 2:Results:paragraph1, 2:Results:paragraph3, 2:Results:paragraph5, 2:Results:paragraph7. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "natural experiment", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "Ontario eligibility thresholds associate with 2.0 percentage-point fewer dementia diagnoses over 5.5 years, with interprovincial trend corroboration.", "what_it_does_not_show": "Eligibility is not receipt; uptake comes from a separate cross-sectional survey, secondary first stage includes zero and sex interaction P=.218 does not establish sex-specific effect.", "confounders_present": [ "Eligibility is not receipt; uptake comes from a separate cross-sectional survey, secondary first stage includes zero and sex interaction P=.218 does not establish sex-specific 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": 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": 3, "pmid": "42296498", "title": "Dementia Risk After Recombinant Herpes Zoster Vaccination in Older Adults With a Recent Skilled-Nursing Facility Stay : A Target Trial Emulation.", "citation": "Hayes KN, Harris DA, McConeghy KW et al. Dementia Risk After Recombinant Herpes Zoster Vaccination in Older Adults With a Recent Skilled-Nursing Facility Stay : A Target Trial Emulation. Annals of internal medicine. 2026.", "doi": "10.7326/ANNALS-25-04689", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/42296498/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42296498/", "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": "PMID42296498", "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 observational", "decisive_perturbation": true, "endogenous": false, "direction": "supports", "what_it_shows": "Clone-censor-weight emulation in 509926 nursing-facility entrants associates RZV with lower 4 year dementia risk.", "what_it_does_not_show": "Only 1.73% vaccinated, most after discharge; negative controls suggest residual confounding despite 57 covariates and targeted emulation.", "confounders_present": [ "Only 1.73% vaccinated, most after discharge; negative controls suggest residual confounding despite 57 covariates and targeted emulation." ], "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": 4, "pmid": "39733478", "title": "Recombinant zoster vaccine and the risk of dementia.", "citation": "Tang E, Ray I, Arnold BF et al. Recombinant zoster vaccine and the risk of dementia. Vaccine. 2025.", "doi": "10.1016/j.vaccine.2024.126673", "pmcid": "PMC11969937", "url": "https://pubmed.ncbi.nlm.nih.gov/39733478/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39733478/", "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": "Optum_OLDW_possible_overlap", "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:paragraph2, 1:Methods:paragraph4, 1:Methods:paragraph6, 2:Results:paragraph3, 2:Results:paragraph4. No complete-paper or supplement audit claimed.", "relates_to_subclaims": [ "SC1", "SC2", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Optum claims cohort associates time-updated one/two RZV doses with dementia HR 0.89/0.68 and antiviral use with lower hazards.", "what_it_does_not_show": "Individuals contribute person-time by dose; covariate adjustment and dose response do not remove health-seeking confounding or establish infection mediation; reported NNT is observational.", "confounders_present": [ "Individuals contribute person-time by dose; covariate adjustment and dose response do not remove health-seeking confounding or establish infection mediation; reported NNT is observational." ], "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": 5, "pmid": "36696249", "title": "Lower dementia risk in patients vaccinated against herpes zoster.", "citation": "Scherrer J, Salas J, Jacobs C et al. Lower dementia risk in patients vaccinated against herpes zoster. Annals of family medicine. 2022.", "doi": "10.1370/afm.20.s1.2680", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/36696249/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36696249/", "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": "VHA_and_MarketScan", "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", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "VHA and MarketScan cohorts with preventive visits associate HZ vaccination with 31–35% lower dementia hazard.", "what_it_does_not_show": "Well-visit restriction and E-values do not prove absence of unmeasured bias; possible database overlap with other reports and product-specificity remain.", "confounders_present": [ "Well-visit restriction and E-values do not prove absence of unmeasured bias; possible database overlap with other reports and product-specificity 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": 6, "pmid": "42443821", "title": "Association between herpes zoster and cognitive impairment among Chinese community-dwelling elderly: a cross-sectional study.", "citation": "Zheng B, Cao W, Zhang L et al. Association between herpes zoster and cognitive impairment among Chinese community-dwelling elderly: a cross-sectional study. BMC public health. 2026.", "doi": "10.1186/s12889-026-28485-9", "pmcid": "PMC13644033", "url": "https://pubmed.ncbi.nlm.nih.gov/42443821/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42443821/", "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": "PMID42443821", "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": [ "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Chinese cross-sectional 1233-person study associates past HZ with education-adjusted cognitive impairment; antiviral estimate is nonsignificant.", "what_it_does_not_show": "Questionnaire history and simultaneous cognitive testing cannot establish temporality, diagnosed dementia prevention or antiviral efficacy.", "confounders_present": [ "Questionnaire history and simultaneous cognitive testing cannot establish temporality, diagnosed dementia prevention or antiviral efficacy." ], "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": "29244265", "title": "Herpes Zoster and Dementia: A Nationwide Population-Based Cohort Study.", "citation": "Chen VC, Wu SI, Huang KY et al. Herpes Zoster and Dementia: A Nationwide Population-Based Cohort Study. The Journal of clinical psychiatry. 2018.", "doi": "10.4088/JCP.16m11312", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/29244265/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/29244265/", "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": "PMID29244265", "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": [ "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Taiwan matched cohort associates HZ with HR 1.11 and antiviral prescriptions with lower dementia hazard.", "what_it_does_not_show": "Treatment selection and diagnosis codes leave confounding; antiherpetic association is not randomized prevention or VZV necessity.", "confounders_present": [ "Treatment selection and diagnosis codes leave confounding; antiherpetic association is not randomized prevention or VZV necessity." ], "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": 8, "pmid": "35170873", "title": "No evidence that herpes zoster is associated with increased risk of dementia diagnosis.", "citation": "Warren-Gash C, Williamson E, Shiekh SI et al. No evidence that herpes zoster is associated with increased risk of dementia diagnosis. Annals of clinical and translational neurology. 2022.", "doi": "10.1002/acn3.51525", "pmcid": "PMC8935278", "url": "https://pubmed.ncbi.nlm.nih.gov/35170873/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35170873/", "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": "PMID35170873", "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": [ "SC3" ], "favors_models": [], "evidence_class": "High", "system": "human observational", "decisive_perturbation": true, "endogenous": false, "direction": "against", "what_it_shows": "UK CPRD cohort finds no increased dementia hazard after HZ, with null dementia-or-death composite and no antiviral variation.", "what_it_does_not_show": "This challenges universal clinical-shingles mediation, while subclinical reactivation and vaccine-specific immune effects are not excluded.", "confounders_present": [ "This challenges universal clinical-shingles mediation, while subclinical reactivation and vaccine-specific immune effects are not excluded." ], "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": "33614892", "title": "Herpesvirus infections, antiviral treatment, and the risk of dementia-a registry-based cohort study in Sweden.", "citation": "Lopatko Lindman K, Hemmingsson ES, Weidung B et al. Herpesvirus infections, antiviral treatment, and the risk of dementia-a registry-based cohort study in Sweden. Alzheimer's & dementia (New York, N. Y.). 2021.", "doi": "10.1002/trc2.12119", "pmcid": "PMC7882534", "url": "https://pubmed.ncbi.nlm.nih.gov/33614892/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33614892/", "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": "PMID33614892", "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": [ "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Swedish registry associates overt HSV/VZV without treatment with greater dementia and antivirals with HR.89.", "what_it_does_not_show": "Mixed herpes exposure, treatment indication and registry confounding do not isolate a necessary VZV path.", "confounders_present": [ "Mixed herpes exposure, treatment indication and registry confounding do not isolate a necessary VZV path." ], "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": 10, "pmid": "41619985", "title": "Atovaquone/proguanil use and zoster vaccination are associated with reduced Alzheimer's disease risk in two cohorts: implications for a latent Toxoplasma gondii mechanism.", "citation": "Israel A, Weizman A, Israel S et al. Atovaquone/proguanil use and zoster vaccination are associated with reduced Alzheimer's disease risk in two cohorts: implications for a latent Toxoplasma gondii mechanism. Brain, behavior, and immunity. 2026.", "doi": "10.1016/j.bbi.2026.106473", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/41619985/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41619985/", "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": "Israel_and_TriNetX_possible_overlap", "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", "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Israeli drug-screen associations for atovaquone/proguanil and VZV vaccines recur in matched TriNetX cohorts.", "what_it_does_not_show": "Medication-wide discovery, travel/health-user selection and exploratory interaction do not establish latent Toxoplasma mechanism or drug benefit.", "confounders_present": [ "Medication-wide discovery, travel/health-user selection and exploratory interaction do not establish latent Toxoplasma mechanism or drug 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": 11, "pmid": "38271405", "title": "Herpes zoster diagnosis and treatment in relation to incident dementia: A population-based retrospective matched cohort study.", "citation": "Weinmann S, Rawlings A, Koppolu P et al. Herpes zoster diagnosis and treatment in relation to incident dementia: A population-based retrospective matched cohort study. PloS one. 2024.", "doi": "10.1371/journal.pone.0296957", "pmcid": "PMC10810473", "url": "https://pubmed.ncbi.nlm.nih.gov/38271405/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38271405/", "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": "PMID38271405", "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": [ "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Kaiser matched cohort finds HZ-dementia HR.99; antiviral association attenuates to.88 with no duration/cumulative-dose trend.", "what_it_does_not_show": "Null HZ association and unstable subgroup treatment signals limit universal mediation; treatment is not randomized.", "confounders_present": [ "Null HZ association and unstable subgroup treatment signals limit universal mediation; treatment is not randomized." ], "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": "32613564", "title": "Association of herpes zoster with dementia and effect of antiviral therapy on dementia: a population-based cohort study.", "citation": "Bae S, Yun SC, Kim MC et al. Association of herpes zoster with dementia and effect of antiviral therapy on dementia: a population-based cohort study. European archives of psychiatry and clinical neuroscience. 2021.", "doi": "10.1007/s00406-020-01157-4", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/32613564/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32613564/", "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": "PMID32613564", "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": [ "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Korean cohort associates HZ with adjusted HR 1.12 and antiviral-treated HZ with lower dementia hazard after matching.", "what_it_does_not_show": "Shared national data platform can overlap other infection papers; measured treatment adjustment does not randomize therapy.", "confounders_present": [ "Shared national data platform can overlap other infection papers; measured treatment adjustment does not randomize therapy." ], "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": "41338191", "title": "The effect of shingles vaccination at different stages of the dementia disease course.", "citation": "Xie M, Eyting M, Bommer C et al. The effect of shingles vaccination at different stages of the dementia disease course. Cell. 2025.", "doi": "10.1016/j.cell.2025.11.007", "pmcid": "PMC12851904", "url": "https://pubmed.ncbi.nlm.nih.gov/41338191/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41338191/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Welsh_eligibility_SAIL", "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": "natural experiment", "decisive_perturbation": false, "endogenous": true, "direction": "supports", "what_it_shows": "Welsh eligibility analysis extends signals to MCI and dementia-related deaths among people already diagnosed.", "what_it_does_not_show": "Same eligibility/cohort as original study, not independent replication; progression and MCI are different scopes from dementia-free incident prevention.", "confounders_present": [ "Same eligibility/cohort as original study, not independent replication; progression and MCI are different scopes from dementia-free incident 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": [ "Reuses Welsh eligibility platform with new MCI/progression endpoints." ] }, { "n": 14, "pmid": "42754179", "title": "Natural experiments of herpes zoster vaccination: Quantifying the implied vaccine effectiveness against dementia.", "citation": "Kivimäki M, Frank P, Livingston G et al. Natural experiments of herpes zoster vaccination: Quantifying the implied vaccine effectiveness against dementia. Brain, behavior, and immunity. 2026.", "doi": "10.1016/j.bbi.2026.107021", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/42754179/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42754179/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42754179", "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" ], "favors_models": [], "evidence_class": "Moderate", "system": "original secondary analysis", "decisive_perturbation": true, "endogenous": false, "direction": "against", "what_it_shows": "New quantitative reanalysis of published natural experiments reports implausibly large receipt-effect implications outside Wales and no corresponding national incidence drop.", "what_it_does_not_show": "Aggregate uptake and comparator-risk assumptions do not directly reanalyse individual local compliers; critique must be resolved, not treated as automatic refutation of every eligibility result.", "confounders_present": [ "Aggregate uptake and comparator-risk assumptions do not directly reanalyse individual local compliers; critique must be resolved, not treated as automatic refutation of every eligibility result." ], "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": [ "Recalculates published Wales/Australia/Canada estimates; not a new randomized cohort." ] }, { "n": 15, "pmid": "40267506", "title": "Herpes Zoster Vaccination and Dementia Occurrence.", "citation": "Pomirchy M, Bommer C, Pradella F et al. Herpes Zoster Vaccination and Dementia Occurrence. JAMA. 2025.", "doi": "10.1001/jama.2025.5013", "pmcid": "PMC12019675", "url": "https://pubmed.ncbi.nlm.nih.gov/40267506/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40267506/", "tier": "A", "source_tier": "A", "kind": "natural_experiment", "status_flags": [ "UpdateOf: PMID38978672" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Australian_PrimaryCare_eligibility", "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": "natural experiment", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "Australian age 80 eligibility discontinuity raises uptake 16.4 points and reduces new dementia diagnosis 1.8 points over 7.4 years.", "what_it_does_not_show": "Abstract reports eligibility effect, not receipt relative risk; local cutoff population differs from overall sample mean age and underlying vaccine-effect critique remains.", "confounders_present": [ "Abstract reports eligibility effect, not receipt relative risk; local cutoff population differs from overall sample mean age and underlying vaccine-effect critique remains." ], "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": 16, "pmid": "39053634", "title": "The recombinant shingles vaccine is associated with lower risk of dementia.", "citation": "Taquet M, Dercon Q, Todd JA et al. The recombinant shingles vaccine is associated with lower risk of dementia. Nature medicine. 2024.", "doi": "10.1038/s41591-024-03201-5", "pmcid": "PMC11485228", "url": "https://pubmed.ncbi.nlm.nih.gov/39053634/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39053634/", "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": "PMID39053634", "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", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": true, "endogenous": false, "direction": "supports", "what_it_shows": "Rapid product-transition comparison associates RZV with 17% more dementia-diagnosis-free time and 164 days among subsequently affected.", "what_it_does_not_show": "Calendar-era treatment transition, measured matching and vaccine comparators are not randomized allocation; relative diagnosis-free time is not 17% risk reduction.", "confounders_present": [ "Calendar-era treatment transition, measured matching and vaccine comparators are not randomized allocation; relative diagnosis-free time is not 17% risk 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": 17, "pmid": "36669485", "title": "Virus exposure and neurodegenerative disease risk across national biobanks.", "citation": "Levine KS, Leonard HL, Blauwendraat C et al. Virus exposure and neurodegenerative disease risk across national biobanks. Neuron. 2023.", "doi": "10.1016/j.neuron.2022.12.029", "pmcid": "PMC10079561", "url": "https://pubmed.ncbi.nlm.nih.gov/36669485/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36669485/", "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": "PMID36669485", "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": [ "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "FinnGen discovery and UKBiobank replication identify viral-exposure associations with later neurodegeneration.", "what_it_does_not_show": "Hospital-coded infection severity, ascertainment and immune vulnerability remain; cross-disease association does not isolate VZV vaccination causality.", "confounders_present": [ "Hospital-coded infection severity, ascertainment and immune vulnerability remain; cross-disease association does not isolate VZV vaccination causality." ], "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": 18, "pmid": "41053450", "title": "Varicella-zoster virus reactivation and the risk of dementia.", "citation": "Polisky V, Littmann M, Triastcyn A et al. Varicella-zoster virus reactivation and the risk of dementia. Nature medicine. 2025.", "doi": "10.1038/s41591-025-03972-5", "pmcid": "PMC12705433", "url": "https://pubmed.ncbi.nlm.nih.gov/41053450/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41053450/", "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": "US_EHR_TriNetX_possible_overlap", "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", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Large EHR analysis links recurrent HZ, vaccine dose and waning patterns to dementia associations after extensive adjustment.", "what_it_does_not_show": "Temporal correlation of protection against HZ and dementia is not randomized mediator dissociation; shared TriNetX networks constrain independent-line counts.", "confounders_present": [ "Temporal correlation of protection against HZ and dementia is not randomized mediator dissociation; shared TriNetX networks constrain independent-line counts." ], "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": 19, "pmid": "35723106", "title": "Risk of Alzheimer's Disease Following Influenza Vaccination: A Claims-Based Cohort Study Using Propensity Score Matching.", "citation": "Bukhbinder AS, Ling Y, Hasan O et al. Risk of Alzheimer's Disease Following Influenza Vaccination: A Claims-Based Cohort Study Using Propensity Score Matching. Journal of Alzheimer's disease : JAD. 2022.", "doi": "10.3233/JAD-220361", "pmcid": "PMC9484126", "url": "https://pubmed.ncbi.nlm.nih.gov/35723106/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35723106/", "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": "PMID35723106", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Propensity-matched US claims associate influenza vaccination with lower 4 year AD diagnoses.", "what_it_does_not_show": "Matched risk differences and calculated NNT are observational, not established clinical prevention or replication of the same zoster mechanism.", "confounders_present": [ "Matched risk differences and calculated NNT are observational, not established clinical prevention or replication of the same zoster mechanism." ], "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": 20, "pmid": "38806183", "title": "A potential association between COVID-19 vaccination and development of Alzheimer's disease.", "citation": "Roh JH, Jung I, Suh Y et al. A potential association between COVID-19 vaccination and development of Alzheimer's disease. QJM : monthly journal of the Association of Physicians. 2024.", "doi": "10.1093/qjmed/hcae103", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/38806183/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38806183/", "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": "PMID38806183", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "against", "what_it_shows": "Korean cohort associates COVID mRNA vaccination with more AD/MCI diagnoses within 3 months.", "what_it_does_not_show": "Short latency and differential contact/diagnostic ascertainment cannot establish vaccine-caused neurodegeneration; a different product does not refute zoster effects.", "confounders_present": [ "Short latency and differential contact/diagnostic ascertainment cannot establish vaccine-caused neurodegeneration; a different product does not refute zoster effects." ], "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": 21, "pmid": "40562756", "title": "Lower risk of dementia with AS01-adjuvanted vaccination against shingles and respiratory syncytial virus infections.", "citation": "Taquet M, Todd JA, Harrison PJ. Lower risk of dementia with AS01-adjuvanted vaccination against shingles and respiratory syncytial virus infections. NPJ vaccines. 2025.", "doi": "10.1038/s41541-025-01172-3", "pmcid": "PMC12198376", "url": "https://pubmed.ncbi.nlm.nih.gov/40562756/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40562756/", "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": "PMID40562756", "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": [ "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": true, "endogenous": false, "direction": "supports", "what_it_shows": "Matched cohorts associate both AS01-adjuvanted RSV and zoster vaccination with lower 18 month dementia risk, with no between-product difference.", "what_it_does_not_show": "Nonsignificance is not equivalence; shared adjuvant, healthy uptake and selection cannot isolate AS01 necessity or direct adjuvant efficacy.", "confounders_present": [ "Nonsignificance is not equivalence; shared adjuvant, healthy uptake and selection cannot isolate AS01 necessity or direct adjuvant efficacy." ], "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": 22, "pmid": "35754275", "title": "Potential Involvement of Varicella Zoster Virus in Alzheimer's Disease via Reactivation of Quiescent Herpes Simplex Virus Type 1.", "citation": "Cairns DM, Itzhaki RF, Kaplan DL. Potential Involvement of Varicella Zoster Virus in Alzheimer's Disease via Reactivation of Quiescent Herpes Simplex Virus Type 1. Journal of Alzheimer's disease : JAD. 2022.", "doi": "10.3233/JAD-220287", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/35754275/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35754275/", "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": "PMID35754275", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. 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Recombinant zoster vaccine is associated with a reduced risk of dementia. Nature communications. 2026.", "doi": "10.1038/s41467-026-69289-0", "pmcid": "PMC12949228", "url": "https://pubmed.ncbi.nlm.nih.gov/41663414/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41663414/", "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": "PMID41663414", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Kaiser RZV two-dose cohort has lower dementia hazard, attenuated from.49 versus unvaccinated to.73 versus Tdap.", "what_it_does_not_show": "Vaccine active comparator reduces but does not eliminate bias; excluding early post-dose dementia changes eligibility/estimand, not randomized prevention.", "confounders_present": [ "Vaccine active comparator reduces but does not eliminate bias; excluding early post-dose dementia changes eligibility/estimand, not randomized 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": 24, "pmid": "37574727", "title": "The Impact of Routine Vaccinations on Alzheimer's Disease Risk in Persons 65 Years and Older: A Claims-Based Cohort Study using Propensity Score Matching.", "citation": "Harris K, Ling Y, Bukhbinder AS et al. The Impact of Routine Vaccinations on Alzheimer's Disease Risk in Persons 65 Years and Older: A Claims-Based Cohort Study using Propensity Score Matching. Journal of Alzheimer's disease : JAD. 2023.", "doi": "10.3233/JAD-221231", "pmcid": "PMC10578243", "url": "https://pubmed.ncbi.nlm.nih.gov/37574727/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/37574727/", "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": "Optum_Clinformatics_possible_overlap", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Optum matched Tdap/HZ/pneumococcal cohorts show lower AD risks over 8 years.", "what_it_does_not_show": "Multiple protective vaccine associations are compatible with healthy-user or immune effects; common source population is not independent causation.", "confounders_present": [ "Multiple protective vaccine associations are compatible with healthy-user or immune effects; common source population is not independent 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": [] }, { "n": 25, "pmid": "41988837", "title": "Herpes zoster vaccination and cognitive disorders in older adults.", "citation": "Oh J, Lee K, Yeo D et al. Herpes zoster vaccination and cognitive disorders in older adults. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2026.", "doi": "10.1002/alz.71410", "pmcid": "PMC13084529", "url": "https://pubmed.ncbi.nlm.nih.gov/41988837/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41988837/", "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": "PMID41988837", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Korean weighted live-vaccine cohort shows lower memory-disorder and AD hazards with modest restricted-mean-time gains.", "what_it_does_not_show": "Initial 2.5 million frame differs from 1041964 analytic sample; dose/time and behaviour associations are not randomized mediation.", "confounders_present": [ "Initial 2.5 million frame differs from 1041964 analytic sample; dose/time and behaviour associations are not randomized 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": 26, "pmid": "42050365", "title": "Reduced risk of dementia with recombinant zoster vaccine in US adults age 65 or older.", "citation": "Dos Reis S, Tran P, Mohanty K et al. Reduced risk of dementia with recombinant zoster vaccine in US adults age 65 or older. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2026.", "doi": "10.1002/alz.71407", "pmcid": "PMC13124665", "url": "https://pubmed.ncbi.nlm.nih.gov/42050365/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42050365/", "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": "PMID42050365", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Medicare matched two-dose RZV cohorts show lower dementia/AD/vascular-dementia hazards across follow-up periods.", "what_it_does_not_show": "Preventive-visit comparator and weights do not remove latent prodromal decline or healthcare-contact differences.", "confounders_present": [ "Preventive-visit comparator and weights do not remove latent prodromal decline or healthcare-contact differences." ], "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": "34420785", "title": "Dementia risk following influenza vaccination in a large veteran cohort.", "citation": "Wiemken TL, Salas J, Hoft DF et al. Dementia risk following influenza vaccination in a large veteran cohort. Vaccine. 2021.", "doi": "10.1016/j.vaccine.2021.08.046", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/34420785/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34420785/", "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": "VHA_possible_overlap", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "VHA influenza cohort associates repeated vaccination with lower dementia hazard, strongest for at least 6 vaccinations.", "what_it_does_not_show": "Repeated adherence can reflect healthy-user selection and opportunity time; national VHA observations may overlap zoster reports.", "confounders_present": [ "Repeated adherence can reflect healthy-user selection and opportunity time; national VHA observations may overlap zoster 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": [] }, { "n": 28, "pmid": "34697158", "title": "Herpes Zoster Vaccination Reduces Risk of Dementia.", "citation": "Lehrer S, Rheinstein PH. Herpes Zoster Vaccination Reduces Risk of Dementia. In vivo (Athens, Greece). 2021.", "doi": "10.21873/invivo.12622", "pmcid": "PMC8627719", "url": "https://pubmed.ncbi.nlm.nih.gov/34697158/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34697158/", "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": "PMID34697158", "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": "Low", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "BRFSS survey links HZ vaccination with less reported social restriction from disorientation or memory loss.", "what_it_does_not_show": "Self-reported cross-sectional social symptoms are not incident diagnosed dementia despite causal title wording; small selected sample.", "confounders_present": [ "Self-reported cross-sectional social symptoms are not incident diagnosed dementia despite causal title wording; small selected sample." ], "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": 29, "pmid": "35434253", "title": "Reduced dementia incidence after varicella zoster vaccination in Wales 2013-2020.", "citation": "Schnier C, Janbek J, Lathe R et al. Reduced dementia incidence after varicella zoster vaccination in Wales 2013-2020. Alzheimer's & dementia (New York, N. Y.). 2022.", "doi": "10.1002/trc2.12293", "pmcid": "PMC9006884", "url": "https://pubmed.ncbi.nlm.nih.gov/35434253/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35434253/", "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": "Welsh_population_overlap_possible", "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", "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Welsh vaccinated-versus-unvaccinated cohort has lower dementia and several other disease/mortality hazards without HZ-diagnosis mediation.", "what_it_does_not_show": "Authors explicitly retain healthy-life-expectancy selection bias; same national setting overlaps later eligibility analyses.", "confounders_present": [ "Authors explicitly retain healthy-life-expectancy selection bias; same national setting overlaps later eligibility analyses." ], "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": "35676090", "title": "Incident Herpes Zoster and Risk of Dementia: A Population-Based Danish Cohort Study.", "citation": "Schmidt SAJ, Veres K, Sørensen HT et al. Incident Herpes Zoster and Risk of Dementia: A Population-Based Danish Cohort Study. Neurology. 2022.", "doi": "10.1212/WNL.0000000000200709", "pmcid": "PMC9484607", "url": "https://pubmed.ncbi.nlm.nih.gov/35676090/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/35676090/", "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": "PMID35676090", "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": [ "SC3" ], "favors_models": [], "evidence_class": "High", "system": "human observational", "decisive_perturbation": true, "endogenous": false, "direction": "against", "what_it_shows": "Danish long-term matched HZ cohort finds no increased dementia overall; rare CNS subgroup estimate is imprecise.", "what_it_does_not_show": "Challenges overt-shingles universal mediation, not all subclinical immune pathways; CNS-attributable fraction is a model, not vaccine effect.", "confounders_present": [ "Challenges overt-shingles universal mediation, not all subclinical immune pathways; CNS-attributable fraction is a model, not vaccine 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": 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": 31, "pmid": "38548241", "title": "Associations of infections and vaccines with Alzheimer's disease point to a role of compromised immunity rather than specific pathogen in AD.", "citation": "Ukraintseva S, Yashkin AP, Akushevich I et al. Associations of infections and vaccines with Alzheimer's disease point to a role of compromised immunity rather than specific pathogen in AD. Experimental gerontology. 2024.", "doi": "10.1016/j.exger.2024.112411", "pmcid": "PMC11060001", "url": "https://pubmed.ncbi.nlm.nih.gov/38548241/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38548241/", "tier": "A", "source_tier": "A", "kind": "primary", "status_flags": [ "UpdateOf: PMID38106098" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID38548241", "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", "SC3", "SC4" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "HRS sample associates multiple infections and adult vaccines with later AD more than other dementias.", "what_it_does_not_show": "Pseudorandomized sampling is not randomized vaccination; common immune vulnerability and exposure ascertainment remain.", "confounders_present": [ "Pseudorandomized sampling is not randomized vaccination; common immune vulnerability and exposure ascertainment 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": 32, "pmid": "31941664", "title": "Influenza vaccination reduces dementia in patients with chronic obstructive pulmonary disease: a nationwide cohort study.", "citation": "Luo CS, Chi CC, Fang YA et al. Influenza vaccination reduces dementia in patients with chronic obstructive pulmonary disease: a nationwide cohort study. Journal of investigative medicine : the official publication of the American Federation for Clinical Research. 2020.", "doi": "10.1136/jim-2019-001155", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/31941664/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31941664/", "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": "PMID31941664", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "Taiwan COPD cohort associates influenza vaccination frequency with lower dementia hazard.", "what_it_does_not_show": "Chronic-disease selection, adherence opportunity and residual bias preclude clinical causal or universal-vaccine inference.", "confounders_present": [ "Chronic-disease selection, adherence opportunity and residual bias preclude clinical causal or universal-vaccine 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": [] }, { "n": 33, "pmid": "41435736", "title": "Disparities in uptake of Shingrix® vaccine in immunosuppressed individuals in England: a population-based cohort study.", "citation": "Barry EVH, Suffel AM, Walker J et al. Disparities in uptake of Shingrix® vaccine in immunosuppressed individuals in England: a population-based cohort study. Vaccine. 2026.", "doi": "10.1016/j.vaccine.2025.128078", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/41435736/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41435736/", "tier": "A", "source_tier": "A", "kind": "descriptive_uptake_study", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID41435736", "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": "descriptive uptake cohort", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "English immunosuppressed-adult cohort finds substantially lower RZV uptake in dementia, care homes and deprivation.", "what_it_does_not_show": "Different clinical population and descriptive uptake do not estimate prevention, but demonstrate a plausible selection path for ordinary cohorts.", "confounders_present": [ "Different clinical population and descriptive uptake do not estimate prevention, but demonstrate a plausible selection path for ordinary cohorts." ], "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": "33882722", "title": "Herpes Zoster Does Not Increase the Risk of Neurodegenerative Dementia: A Case-Control Study.", "citation": "Choi HG, Park BJ, Lim JS et al. Herpes Zoster Does Not Increase the Risk of Neurodegenerative Dementia: A Case-Control Study. American journal of Alzheimer's disease and other dementias. 2021.", "doi": "10.1177/15333175211006504", "pmcid": "PMC11005322", "url": "https://pubmed.ncbi.nlm.nih.gov/33882722/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/33882722/", "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": "PMID33882722", "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": [ "SC3" ], "favors_models": [], "evidence_class": "Moderate", "system": "human observational", "decisive_perturbation": false, "endogenous": false, "direction": "against", "what_it_shows": "Korean case-control histories show no positive HZ-neurodegenerative-dementia association.", "what_it_does_not_show": "Retrospective coding and shared national platform constrain independence; inverse association is not proof HZ protects.", "confounders_present": [ "Retrospective coding and shared national platform constrain independence; inverse association is not proof HZ protects." ], "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": "26945371", "title": "Influenza Vaccination Reduces Dementia Risk in Chronic Kidney Disease Patients: A Population-Based Cohort Study.", "citation": "Liu JC, Hsu YP, Kao PF et al. Influenza Vaccination Reduces Dementia Risk in Chronic Kidney Disease Patients: A Population-Based Cohort Study. Medicine. 2016.", "doi": "10.1097/MD.0000000000002868", "pmcid": "PMC4782855", "url": "https://pubmed.ncbi.nlm.nih.gov/26945371/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/26945371/", "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": "PMID26945371", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. 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Increased incidence of dementia following herpesvirus infection in the Korean population. Medicine. 2022.", "doi": "10.1097/MD.0000000000031116", "pmcid": "PMC9575754", "url": "https://pubmed.ncbi.nlm.nih.gov/36254002/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36254002/", "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": "PMID36254002", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. 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Repurposing antihypertensive drugs for the prevention of Alzheimer's disease: a Mendelian randomization study. International journal of epidemiology. 2020.", "doi": "10.1093/ije/dyz155", "pmcid": "PMC7751008", "url": "https://pubmed.ncbi.nlm.nih.gov/31335937/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/31335937/", "tier": "A", "source_tier": "A", "kind": "mendelian_randomization", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID31335937", "access_depth": "abstract_metadata", "access_note": "Bounded original primary abstract Results/Findings/conclusion passages and linked-status metadata examined; no complete-abstract audit asserted. 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Repurposing drugs for the prevention of vascular dementia using evidence from drug target Mendelian randomization. Nature aging. 2026.", "doi": "10.1038/s43587-026-01106-1", "pmcid": "PMC13099373", "url": "https://pubmed.ncbi.nlm.nih.gov/42009889/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/42009889/", "tier": "A", "source_tier": "A", "kind": "mendelian_randomization", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42009889", "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": "mendelian randomization", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Drug-target VaD MR is largely null after multiple-testing correction, with tentative beta1/ACE signals.", "what_it_does_not_show": "Tentative target proxies and imaging surrogates are not clinical drug efficacy or established pharmacovigilance harm.", "confounders_present": [ "Tentative target proxies and imaging surrogates are not clinical drug efficacy or established pharmacovigilance harm." ], "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": "38609734", "title": "Association of Tumor Necrosis Factor-α Inhibitors with Incident Dementia: Analysis Based on Population-Based Cohort Studies.", "citation": "Berger S, Moseholm KF, Hegelund ER et al. Association of Tumor Necrosis Factor-α Inhibitors with Incident Dementia: Analysis Based on Population-Based Cohort Studies. Drugs & aging. 2024.", "doi": "10.1007/s40266-024-01112-1", "pmcid": "PMC11093812", "url": "https://pubmed.ncbi.nlm.nih.gov/38609734/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38609734/", "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": "PMID38609734", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Danish/German rheumatology cohorts have nonsignificant lower dementia estimates for TNF inhibitors.", "what_it_does_not_show": "Clinical-indication confounding and wide confidence intervals leave no demonstrated preventive benefit; no equivalence conclusion.", "confounders_present": [ "Clinical-indication confounding and wide confidence intervals leave no demonstrated preventive benefit; no equivalence conclusion." ], "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": "38871078", "title": "Metformin-induced changes in the gut microbiome and plasma metabolome are associated with cognition in men.", "citation": "Rosell-Díaz M, Petit-Gay A, Molas-Prat C et al. Metformin-induced changes in the gut microbiome and plasma metabolome are associated with cognition in men. Metabolism: clinical and experimental. 2024.", "doi": "10.1016/j.metabol.2024.155941", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/38871078/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38871078/", "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": "PMID38871078", "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": "Observational plus small randomized metformin cohorts show microbiome/metabolome changes and male-stratified memory correlations.", "what_it_does_not_show": "Whole metformin-treated cohort ratio-cognition association is null; biomarker/correlation and sex stratification do not establish incident dementia prevention.", "confounders_present": [ "Whole metformin-treated cohort ratio-cognition association is null; biomarker/correlation and sex stratification do not establish incident dementia 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": 41, "pmid": "40258956", "title": "Blood pressure reduction and all-cause dementia in people with uncontrolled hypertension: an open-label, blinded-endpoint, cluster-randomized trial.", "citation": "He J, Zhao C, Zhong S et al. Blood pressure reduction and all-cause dementia in people with uncontrolled hypertension: an open-label, blinded-endpoint, cluster-randomized trial. Nature medicine. 2025.", "doi": "10.1038/s41591-025-03616-8", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/40258956/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40258956/", "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": "PMID40258956", "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": "High", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "supports", "what_it_shows": "326-village randomized BP-care programme reduces all-cause dementia over 48 months in 33995 hypertensive adults.", "what_it_does_not_show": "A genuine clinical prevention positive for its assigned care package, not proof of each antihypertensive molecule or the same vaccine mediator.", "confounders_present": [ "A genuine clinical prevention positive for its assigned care package, not proof of each antihypertensive molecule or the same vaccine 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": "Pivotal test, including null or negative results and restricted contexts; this flag is not a positive threshold crossing.", "shared_components": [] }, { "n": 42, "pmid": "34167639", "title": "Effect of Statin Therapy on Cognitive Decline and Incident Dementia in Older Adults.", "citation": "Zhou Z, Ryan J, Ernst ME et al. Effect of Statin Therapy on Cognitive Decline and Incident Dementia in Older Adults. Journal of the American College of Cardiology. 2021.", "doi": "10.1016/j.jacc.2021.04.075", "pmcid": "PMC13292795", "url": "https://pubmed.ncbi.nlm.nih.gov/34167639/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/34167639/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "ASPREE", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Baseline statin use in ASPREE is not associated with dementia, MCI or cognitive decline.", "what_it_does_not_show": "Statin exposure was observational even though parent aspirin trial was randomized; subgroup interaction does not create drug assignment.", "confounders_present": [ "Statin exposure was observational even though parent aspirin trial was randomized; subgroup interaction does not create drug assignment." ], "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": [ "ASPREE participants; statin exposure observational while aspirin assignment randomized." ] }, { "n": 43, "pmid": "39312220", "title": "Deprescribing of Antihypertensive Medications and Cognitive Function in Nursing Home Residents.", "citation": "Jing B, Liu X, Graham LA et al. Deprescribing of Antihypertensive Medications and Cognitive Function in Nursing Home Residents. JAMA internal medicine. 2024.", "doi": "10.1001/jamainternmed.2024.4851", "pmcid": "PMC11420821", "url": "https://pubmed.ncbi.nlm.nih.gov/39312220/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/39312220/", "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": "PMID39312220", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "VA target-trial emulation associates antihypertensive deprescribing with less cognitive-category decline in nursing-home residents.", "what_it_does_not_show": "Frail baseline setting and many existing dementia cases differ from incident prevention; medication change selection remains.", "confounders_present": [ "Frail baseline setting and many existing dementia cases differ from incident prevention; medication change selection remains." ], "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": 44, "pmid": "40388190", "title": "Glucose-Lowering Medications, Glycemia, and Cognitive Outcomes: The GRADE Randomized Clinical Trial.", "citation": "Luchsinger JA, Rosin SP, Kazemi EJ et al. Glucose-Lowering Medications, Glycemia, and Cognitive Outcomes: The GRADE Randomized Clinical Trial. JAMA internal medicine. 2025.", "doi": "10.1001/jamainternmed.2025.1189", "pmcid": "PMC12090067", "url": "https://pubmed.ncbi.nlm.nih.gov/40388190/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40388190/", "tier": "A", "source_tier": "A", "kind": "secondary_analysis", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID40388190", "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": "High", "system": "human interventional", "decisive_perturbation": false, "endogenous": true, "direction": "mixed", "what_it_shows": "GRADE randomized second-line diabetes agents show no cognitive-test differences over 4.1 years; glycemic exposure correlates with tests.", "what_it_does_not_show": "No diagnosed dementia endpoint or placebo metformin contrast; association with HbA1c is not randomized glucose-mediator efficacy.", "confounders_present": [ "No diagnosed dementia endpoint or placebo metformin contrast; association with HbA1c is not randomized glucose-mediator efficacy." ], "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": 45, "pmid": "38832504", "title": "Cerebrovascular Effects of Sildenafil in Small Vessel Disease: The OxHARP Trial.", "citation": "Webb AJS, Birks JS, Feakins KA et al. Cerebrovascular Effects of Sildenafil in Small Vessel Disease: The OxHARP Trial. Circulation research. 2024.", "doi": "10.1161/CIRCRESAHA.124.324327", "pmcid": "PMC11227301", "url": "https://pubmed.ncbi.nlm.nih.gov/38832504/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/38832504/", "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": "PMID38832504", "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": "OxHARP randomized crossover sildenafil has null primary cerebral pulsatility but better secondary perfusion/reactivity.", "what_it_does_not_show": "Three-week surrogate benefit is not dementia prevention; crossover participants and secondary testing do not yield independent causal lines.", "confounders_present": [ "Three-week surrogate benefit is not dementia prevention; crossover participants and secondary testing do not yield independent causal lines." ], "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": 46, "pmid": "40552638", "title": "Associations of semaglutide with Alzheimer's disease-related dementias in patients with type 2 diabetes: A real-world target trial emulation study.", "citation": "Wang W, Davis PB, Qi X et al. Associations of semaglutide with Alzheimer's disease-related dementias in patients with type 2 diabetes: A real-world target trial emulation study. Journal of Alzheimer's disease : JAD. 2025.", "doi": "10.1177/13872877251351329", "pmcid": "PMC12262134", "url": "https://pubmed.ncbi.nlm.nih.gov/40552638/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40552638/", "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": "PMID40552638", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "supports", "what_it_shows": "US semaglutide target emulation associates use with lower ADRD than several diabetic comparators.", "what_it_does_not_show": "Confounding by indication, metabolic improvement and diagnosis remain; FTD/Lewy-body nulls prevent a uniform effect across dementias.", "confounders_present": [ "Confounding by indication, metabolic improvement and diagnosis remain; FTD/Lewy-body nulls prevent a uniform effect across dementias." ], "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": "41748529", "title": "The heterogeneous treatment effects of statins on dementia: a target trial emulation with causal machine learning using integrated genetic and real-world data.", "citation": "Lai Y, Her QL, Zhang Y et al. The heterogeneous treatment effects of statins on dementia: a target trial emulation with causal machine learning using integrated genetic and real-world data. Alzheimer's & dementia : the journal of the Alzheimer's Association. 2026.", "doi": "10.1002/alz.71178", "pmcid": "PMC12945722", "url": "https://pubmed.ncbi.nlm.nih.gov/41748529/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/41748529/", "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": "PMID41748529", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Statin emulation shows null overall 5 year dementia difference and exploratory genotype-defined subgroup signals.", "what_it_does_not_show": "Data-derived treatment heterogeneity and all-dementia interval crossing zero do not validate a beneficiary group or randomized effect.", "confounders_present": [ "Data-derived treatment heterogeneity and all-dementia interval crossing zero do not validate a beneficiary group or randomized 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": true, "decisive_test_note": "", "shared_components": [] }, { "n": 48, "pmid": "40690769", "title": "Glucagon-Like Peptide-1 Receptor Agonists and Incidence of Dementia Among Older Adults With Type 2 Diabetes : A Target Trial Emulation.", "citation": "Inoue K, Saliba D, Gotanda H et al. Glucagon-Like Peptide-1 Receptor Agonists and Incidence of Dementia Among Older Adults With Type 2 Diabetes : A Target Trial Emulation. Annals of internal medicine. 2025.", "doi": "10.7326/ANNALS-24-02648", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/40690769/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/40690769/", "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": "PMID40690769", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "Medicare GLP1-versus-DPP4 target emulation finds no clear overall dementia difference, with age-varying estimates.", "what_it_does_not_show": "Wide compatible effects, unmeasured BMI/glycemia/duration and short follow-up limit efficacy or age-boundary inference.", "confounders_present": [ "Wide compatible effects, unmeasured BMI/glycemia/duration and short follow-up limit efficacy or age-boundary 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": true, "decisive_test_note": "", "shared_components": [] }, { "n": 49, "pmid": "36394298", "title": "Antihypertensive medication classes and the risk of dementia over a decade of follow-up.", "citation": "Schroevers JL, Eggink E, Hoevenaar-Blom MP et al. Antihypertensive medication classes and the risk of dementia over a decade of follow-up. Journal of hypertension. 2023.", "doi": "10.1097/HJH.0000000000003324", "pmcid": "PMC9799049", "url": "https://pubmed.ncbi.nlm.nih.gov/36394298/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/36394298/", "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": "PMID36394298", "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 observational", "decisive_perturbation": false, "endogenous": false, "direction": "mixed", "what_it_shows": "preDIVA antihypertensive-class associations attenuate by 10.4 years, with confidence intervals crossing null.", "what_it_does_not_show": "Post-hoc medication exposures are not randomized drug classes; changing age/adherence and competing risks constrain attribution.", "confounders_present": [ "Post-hoc medication exposures are not randomized drug classes; changing age/adherence and competing risks constrain attribution." ], "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": 50, "pmid": "30688979", "title": "Effect of Intensive vs Standard Blood Pressure Control on Probable Dementia: A Randomized Clinical Trial.", "citation": "SPRINT MIND Investigators for the SPRINT Research Group, Williamson JD, Pajewski NM et al. Effect of Intensive vs Standard Blood Pressure Control on Probable Dementia: A Randomized Clinical Trial. JAMA. 2019.", "doi": "10.1001/jama.2018.21442", "pmcid": "PMC6439590", "url": "https://pubmed.ncbi.nlm.nih.gov/30688979/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/30688979/", "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": "PMID30688979", "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": "High", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "SPRINT intensive BP assignment lowers MCI and composite cognitive impairment but not significant probable dementia.", "what_it_does_not_show": "Early stopping and fewer dementia events limit power; positive composite must not replace null registered dementia endpoint.", "confounders_present": [ "Early stopping and fewer dementia events limit power; positive composite must not replace null registered dementia endpoint." ], "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": 51, "pmid": "9802273", "title": "Prevention of dementia in randomised double-blind placebo-controlled Systolic Hypertension in Europe (Syst-Eur) trial.", "citation": "Forette F, Seux ML, Staessen JA et al. Prevention of dementia in randomised double-blind placebo-controlled Systolic Hypertension in Europe (Syst-Eur) trial. Lancet (London, England). 1998.", "doi": "10.1016/s0140-6736(98)03086-4", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/9802273/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/9802273/", "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": "PMID9802273", "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": "supports", "what_it_shows": "SystEur randomized BP regimen reports 21 versus 11 dementia cases over 2 years atP=.05.", "what_it_does_not_show": "Small borderline event set and multi-agent regimen do not establish each drug, longer horizon or zoster-equivalent mediation.", "confounders_present": [ "Small borderline event set and multi-agent regimen do not establish each drug, longer horizon or zoster-equivalent 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": true, "decisive_test_note": "", "shared_components": [] }, { "n": 52, "pmid": "18614402", "title": "Incident dementia and blood pressure lowering in the Hypertension in the Very Elderly Trial cognitive function assessment (HYVET-COG): a double-blind, placebo controlled trial.", "citation": "Peters R, Beckett N, Forette F et al. Incident dementia and blood pressure lowering in the Hypertension in the Very Elderly Trial cognitive function assessment (HYVET-COG): a double-blind, placebo controlled trial. The Lancet. Neurology. 2008.", "doi": "10.1016/S1474-4422(08)70143-1", "pmcid": "", "url": "https://pubmed.ncbi.nlm.nih.gov/18614402/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/18614402/", "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": "PMID18614402", "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": "High", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "HYVET original 3336-person comparison lowersBP without significant incident dementia benefit.", "what_it_does_not_show": "Early stopping/short follow-up and confidence interval permit benefit; pooled meta-component is not counted as another primary experiment.", "confounders_present": [ "Early stopping/short follow-up and confidence interval permit benefit; pooled meta-component is not counted as another primary experiment." ], "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": "32213642", "title": "Randomized placebo-controlled trial of the effects of aspirin on dementia and cognitive decline.", "citation": "Ryan J, Storey E, Murray AM et al. Randomized placebo-controlled trial of the effects of aspirin on dementia and cognitive decline. Neurology. 2020.", "doi": "10.1212/WNL.0000000000009277", "pmcid": "PMC7455352", "url": "https://pubmed.ncbi.nlm.nih.gov/32213642/", "source_pointer": "https://pubmed.ncbi.nlm.nih.gov/32213642/", "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": "ASPREE", "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": "High", "system": "human interventional", "decisive_perturbation": true, "endogenous": true, "direction": "mixed", "what_it_shows": "ASPREE randomized aspirin in 19114 older adults shows no dementia/MCI/cognitive benefit over 4.7 years.", "what_it_does_not_show": "No class-wide preventive drug conclusion follows; statin analyses share cohort but aspirin assignment is distinct.", "confounders_present": [ "No class-wide preventive drug conclusion follows; statin analyses share cohort but aspirin assignment is distinct." ], "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": [] } ], "verification_summary": { "load_bearing_claims_checked": 58, "verified": 58, "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": "Β", "cap_source": "universal", "triggered": true, "trigger_text_quoted": "Pure association evidence — however large, however replicated — cannot exceed Β.", "specific_trigger": "Vaccination precedes lower recorded dementia incidence in multiple ordinary cohorts. These descriptive associations retain Β; larger samples and extensive adjustment alone do not create causal assignment.", "resulting_ceiling": "Β" } ], "cap_precedence_resolutions": [ { "collision": "Perturbation in a defined setting versus broader inference", "subclaim_scope_cap_binds_on": "Shingles vaccination causally reduces incident dementia in older adults.", "subclaim_scope_threshold_binds_on": "The precise experimentally tested subclaim scope", "resolution": "Do not apply the association cap to a valid assembled natural experiment as if it were an ordinary cohort. Conversely, cohort size, culture markers and international repetition of eligibility designs do not alone establish higher independent causal convergence. Preserve clinical hypertension-prevention successes without lending their randomization to vaccination.", "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- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Unperturbed clinical association remains Β." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Vaccination precedes lower recorded dementia incidence in multiple ordinary cohorts. These descriptive associations retain Β; larger samples and extensive adjustment alone do not create causal assignment.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC2", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "yes", "qualifying_evidence_citation": "PMID40175543", "gamma_hard_rules_triggered": [ "No proxy-only substitution: clinical recorded dementia and natural treatment encouragement are assessed." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "yes", "perturbation_result_note": "The Welsh fuzzy eligibility discontinuity provides a positive local clinical causal-inference crossing, with strong first-stage uptake and baseline/placebo checks. Australian and Canadian eligibility analyses corroborate diagnosis differences but differ in receipt-effect identification and uptake precision. A 2026 quantitative challenge reports implausible implied effects outside Wales and deserves direct resolution. Δ is awarded for a restricted field-valid natural experiment, with Moderate confidence and no assertion of product-wide randomized confirmation.", "ceiling_from_boundary_check": "Δ or higher" }, { "subclaim_id": "SC3", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Cell-marker and observational-mediation support does not identify a necessary path." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Clinical and subclinical VZV suppression, heterologous immune effects and healthcare pathways remain plausible. Infection cohorts conflict; neural-culture reactivation and vaccine-waning correlations do not independently isolate the necessary mediator. Same-uptake sex differences and observational AS01 comparisons do not prove an exclusive pathway.", "ceiling_from_boundary_check": "Γ" }, { "subclaim_id": "SC4", "field_valid_perturbation_quote": "\n- Endogenous genetic deletion, suppression, or degron depletion of the proposed mediator in vivo\n- Selective pathway inhibition that changes onset/progression while preserving broader viability\n- Vagotomy-type natural experiment, only if confounding is rigorously controlled AND effect is disease-initiation relevant rather than merely associated", "qualifying_evidence_present": "no", "qualifying_evidence_citation": "", "gamma_hard_rules_triggered": [ "Agent-specific clinical successes do not imply universal same-mechanism prevention." ], "disease_phenotype_relevance": "yes", "perturbation_result_positive": "no", "perturbation_result_note": "Other vaccines and repurposed drugs have agent-specific evidence, not a uniform reproduction of the zoster effect. The randomized Chinese hypertension-care programme and borderline SystEur positive retain clinical benefit in their own scopes; SPRINT probable dementia, HYVET, aspirin and GRADE cognitive outcomes include nulls. The conjunctive class transfer remains Γ, without downgrading those separate successes.", "ceiling_from_boundary_check": "Γ" } ], "thresholds_tested": [ { "subclaim_id": "SC1", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "A valid exogenous assignment or controlled clinical prevention contrast, not more ordinary cohorts." }, { "subclaim_id": "SC2", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "yes", "supporting_evidence": [ "[1] Welsh birth-date eligibility discontinuity identifies a local live-vaccine effect on new dementia diagnosis: reported receipt effect 3.5 percentage points over 7 years." ], "what_would_cross_it": "" }, { "subclaim_id": "SC2", "threshold": "Ε", "requirement_quoted": "Requires causal support in a defined context, but with clear restriction by subtype, disease stage, model, or tissue.\n\nUse Ε when there is a real causal contribution, but generalization to the entire disease class fails.", "satisfied": "no", "supporting_evidence": [ "[1] Welsh birth-date eligibility discontinuity identifies a local live-vaccine effect on new dementia diagnosis: reported receipt effect 3.5 percentage points over 7 years." ], "what_would_cross_it": "Resolve the 2026 effect-size challenge using harmonized individual-level local uptake and counterfactual complier risks; then confirm live/recombinant clinical endpoints by independent assignment with prespecified age/product/sex tests." }, { "subclaim_id": "SC3", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Separate viral suppression from adjuvant effects in a credible randomized product/component or mediator-specific design, including measured reactivation and clinical dementia." }, { "subclaim_id": "SC4", "threshold": "Δ", "requirement_quoted": "Requires at least one genuine causal perturbation in a disease-relevant in vivo system, or equivalent human natural experiment that materially supports the mechanism.", "satisfied": "no", "supporting_evidence": [], "what_would_cross_it": "Agent-specific randomized or valid natural preventive clinical tests; a drug-class analogy or biomarker response cannot substitute." } ], "generalization_check": { "generalization_tested": "yes", "context_boundary_mapped": "no", "internal_negative_controls": "Welsh false birth-date/preprogramme and other-diagnosis checks; Canadian balance and interprovincial trends; active vaccine comparators and residual-bias controls in recombinant cohorts. Controls test particular biases rather than certify their total absence.", "note": "Country replication supports local eligibility effects; age-near-cutoff, live product, follow-up and recorded diagnosis remain explicit. Recombinant cohorts are supportive but generally observational. Canadian women-positive/men-nonsignificant with interaction P=.218 cannot define a proven sex beneficiary boundary." }, "falsification_patterns_met": [], "pitfalls_flagged": [ { "pitfall": "Association treated as causal mediation", "where": "VZV infection/dementia correlations, dose response and AS01 active comparison are not necessary-path perturbations." }, { "pitfall": "Causal estimand conflation", "where": "Eligibility effect, receipt CACE, risk reduction and diagnosis-free time are different quantities." }, { "pitfall": "Replication confused with independent causal lines", "where": "Welsh stage endpoints and repeated registry analyses share source platforms; preprints not counted separately." }, { "pitfall": "Endpoint substitution", "where": "MCI, cerebral perfusion, memory correlations and biological AD onset do not replace incident dementia." } ], "causal_tally_audit": { "tally_claimed_by_document": 1, "tally_after_audit": 1, "tally_unit": "Positive qualifying study units across scoped subclaims, not independent causal lines or full-claim necessity/sufficiency.", "screened_discriminating_contrasts": 28, "items_rejected": [ "Null and negative contrasts are discriminators, not positive threshold crossings. Reports and replications are not independent causal lines.", "Only the verified Welsh receipt-identification design earns exact positive SC2 crossing credit; international eligibility effects are supportive and remain different estimands.", "Hypertension clinical successes retain their drug/clinical scope and do not increase the vaccination causal tally.", "The 53 originals include comparator, mediation, uptake and analytic-challenge studies, not 53 zoster-prevention trials." ] }, "steelman": { "case_one_rung_higher": "The strongest Ε case uses independent-country replications and female-predominant effects as a mapped causal boundary. However, age/product transfers remain largely observational, the Canadian sex interaction is nonsignificant, and the 2026 implied-effect critique has not been resolved at individual-complier level. These observations do not yet map a reproducible causal failure context.", "case_one_rung_lower": "The strongest Γ case says unresolved instrumental-variable assumptions, diagnosis effects and implausible international implied receipt effects leave mechanistic plausibility alone. This would underweight the strong Welsh first stage, cutoff balance and positive diagnosed endpoint. The critique remains serious but does not by itself demonstrate failure of the Welsh local design.", "which_rejected": "Δ preserves the local positive causal-inference crossing while withholding mapped generalization and independent convergence. Neither universal protection nor definitive refutation follows. Confidence is Moderate because primary-body checks expose estimand and first-stage limits and an unresolved quantitative challenge.", "blocking_cap_threshold_or_missing_experiment": "Missing experiment: Combine an ethically designed randomized timing/product or vaccine-encouragement comparison within clinically permitted practice with adjudicated incident dementia, active comparators and competing-death analyses. Prespecify product, age and sex, assess baseline cognition and healthcare contacts, and separately reproduce eligibility estimates using individual uptake and counterfactual complier risks. A mechanistic substudy must distinguish viral reactivation from adjuvant immunity without replacing clinical endpoints." }, "final_score": { "hsef_level": "Δ", "hsef_descriptor": "First field-valid causal perturbation crossed", "confidence": "Moderate", "confidence_rationale": "53 primary reports with 3 selected partial-body examinations; evidence density, independent replication and heterogeneity of controls set the confidence; access depth and belief in correctness do not.", "rests_on_non_peer_reviewed_work": false, "rationale": "The preregistered primary-subclaim rule returns Δ from SC2: the strongest evidence is a positive local age-eligibility natural experiment for live-zoster vaccination and recorded dementia, with international eligibility corroboration. Multiple related discontinuity analyses do not automatically supply independently failing causal modalities. Receipt-effect assumptions, a quantitative 2026 critique, diagnosis ascertainment, product transfer and exploratory sex boundaries prevent a higher grade. Weakest-link returns Β; primary and scope-matched return Δ. This is stronger than an ordinary association but remains a bounded causal-inference judgment rather than completed randomized dementia-prevention proof." }, "role_of_mechanism": { "classification": "reinforcing / stabilizing factor", "derivation_step_matched": 5, "derivation": "Vaccination precedes a potential reduction in diagnosed disease risk, so it is not merely downstream consequence. Neither necessity for all dementia nor an initiating/rate-limiting VZV dependency is established. The protective influence is classified as reinforcing/stabilizing maintenance of neuroimmune health, conditional on the local causal evidence.", "tournament_used_as_tiebreaker": false, "note": "Derived from causal direction, not tournament rank." }, "extended_scoring_MSD": { "momentum": { "value": "Mechanistic only", "artifact": "Recent natural experiments and product comparisons refine assignment and mediation questions. No verified named pending dementia-prevention result is used to predict a specific next grade.", "justification": "Recent natural experiments and product comparisons refine assignment and mediation questions. No verified named pending dementia-prevention result is used to predict a specific next grade." }, "stability": { "value": "Stable", "trigger": "No verified pending result was identified that demonstrably determines the next grade. The published 2026 critique is current evidence, not a forecasted result.", "justification": "No verified pending result was identified that demonstrably determines the next grade. The published 2026 critique is current evidence, not a forecasted result." }, "divergence": { "implied_level": null, "implied_level_basis": "No single field-implied level is defensible from conflicting framings.", "assessed_level": "Δ", "gap_in_rungs": null, "value": "Contested", "justification": "No single field-implied level is defensible from conflicting framings, so no implied level and no rung arithmetic are stated: the Welsh, Australian and Canadian eligibility analyses are presented in the field as near-settled prevention, while the 2026 quantitative critique (PMID42754179) and the unreviewed English null preprint present the same evidence as not yet credible. 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": "Δ", "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": "Combine an ethically designed randomized timing/product or vaccine-encouragement comparison within clinically permitted practice with adjudicated incident dementia, active comparators and competing-death analyses. Prespecify product, age and sex, assess baseline cognition and healthcare contacts, and separately reproduce eligibility estimates using individual uptake and counterfactual complier risks. A mechanistic substudy must distinguish viral reactivation from adjuvant immunity without replacing clinical endpoints.", "readout": "Adjudicated incident dementia and diagnosis-free survival over years, with mortality competing-risk sensitivity and prespecified product/age/sex interaction tests", "critical_control": "Comparable healthcare contacts, baseline cognition, calendar time, vaccination uptake, placebo cutoffs and an active vaccine comparator; blinded dementia adjudication", "supporting_result": "Replicated positive clinical effect under credible assignment, with coherent eligibility-to-receipt estimates and independent measurement", "falsifying_result": "No clinically meaningful difference despite adequate uptake separation/power, or a diagnosis difference eliminated by ascertainment/cutoff correction" } ], "knowledge_gaps": [ { "name": "Gap 1", "statement": "Resolve implausible international implied receipt effects and weak separate-survey first stages with individual-level local data.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 2", "statement": "Direct preventive efficacy of recombinant vaccination rather than ordinary vaccinee cohorts.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 3", "statement": "Biological onset versus delayed clinical diagnosis and competing-death effects.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 4", "statement": "Prespecified age/product/sex boundaries with formal interaction tests.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 5", "statement": "Separate infection suppression, heterologous immune effects and healthcare pathways.", "relevance": "Limits mechanism identification or scope." }, { "name": "Gap 6", "statement": "Drug-specific clinical prevention rather than class transfer from surrogate or observational successes.", "relevance": "Limits mechanism identification or scope." } ], "review_metadata": { "review_date": "2026-10-13", "reviewer": "Codex", "evidence_base_note": "53 primary reports; 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." }, "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": "Natural experiments were assessed directly; their clinical phenotype adaptation is explicit. Same-modality international replication, retrospective product comparisons and cell-marker experiments do not automatically satisfy independently failing causal lines. No universal association cap is reimposed on the valid Welsh natural experiment." }, { "kind": "natural_experiment", "available": true, "why_not_sufficient": "Natural experiments were assessed directly; their clinical phenotype adaptation is explicit. Same-modality international replication, retrospective product comparisons and cell-marker experiments do not automatically satisfy independently failing causal lines. No universal association cap is reimposed on the valid Welsh natural experiment." }, { "kind": "dose_response_across_populations", "available": false, "why_not_sufficient": "Natural experiments were assessed directly; their clinical phenotype adaptation is explicit. Same-modality international replication, retrospective product comparisons and cell-marker experiments do not automatically satisfy independently failing causal lines. No universal association cap is reimposed on the valid Welsh natural experiment." }, { "kind": "withdrawal_rechallenge", "available": false, "why_not_sufficient": "Natural experiments were assessed directly; their clinical phenotype adaptation is explicit. Same-modality international replication, retrospective product comparisons and cell-marker experiments do not automatically satisfy independently failing causal lines. No universal association cap is reimposed on the valid Welsh natural experiment." }, { "kind": "therapeutic_perturbation_hard_endpoint", "available": false, "why_not_sufficient": "Natural experiments were assessed directly; their clinical phenotype adaptation is explicit. Same-modality international replication, retrospective product comparisons and cell-marker experiments do not automatically satisfy independently failing causal lines. No universal association cap is reimposed on the valid Welsh natural experiment." } ], "convergence_present": false, "cap_reapplied_to_convergent_set": false }, "provenance_header": { "sources_total": 53, "claims_total": 58, "claims_verified": 58, "claims_unverified": 0, "claims_contradicted": 0, "tier_a_sources": 53, "generated_by": "Codex; HSEF v5.3", "gate_passed": true }, "claims": [ { "id": "C 1", "text": "Welsh birth-date eligibility discontinuity identifies a local live-vaccine effect on new dementia diagnosis: reported receipt effect 3.5 percentage points over 7 years. CACE requires continuity, exclusion and monotonicity; diagnoses are not biological onset, age-near 80/product-specific and exploratory mediation is not necessity.", "carries_number": true, "load_bearing_for": [ "SC1", "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. Selected body sections: 6:Explorations of the effect mechanism:paragraph4, 6:Explorations of the effect mechanism:paragraph8, 6:Explorations of the effect mechanism:paragraph10, 6:Explorations of the effect mechanism:paragraph12, 8:Methods:paragraph6, 8:Methods:paragraph7, 8:Methods:paragraph8, 8:Methods:paragraph12, 8:Methods:paragraph14, 8:Methods:paragraph15. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C 2", "text": "Ontario eligibility thresholds associate with 2.0 percentage-point fewer dementia diagnoses over 5.5 years, with interprovincial trend corroboration. Eligibility is not receipt; uptake comes from a separate cross-sectional survey, secondary first stage includes zero and sex interaction P=.218 does not establish sex-specific effect.", "carries_number": true, "load_bearing_for": [ "SC1", "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. Selected body sections: 1:Methods:paragraph2, 1:Methods:paragraph4, 1:Methods:paragraph5, 2:Results:paragraph1, 2:Results:paragraph3, 2:Results:paragraph5, 2:Results:paragraph7. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C 3", "text": "Clone-censor-weight emulation in 509926 nursing-facility entrants associates RZV with lower 4 year dementia risk. Only 1.73% vaccinated, most after discharge; negative controls suggest residual confounding despite 57 covariates and targeted emulation.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "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": "C 4", "text": "Optum claims cohort associates time-updated one/two RZV doses with dementia HR 0.89/0.68 and antiviral use with lower hazards. Individuals contribute person-time by dose; covariate adjustment and dose response do not remove health-seeking confounding or establish infection mediation; reported NNT is observational.", "carries_number": true, "load_bearing_for": [ "SC1", "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. Selected body sections: 1:Methods:paragraph2, 1:Methods:paragraph4, 1:Methods:paragraph6, 2:Results:paragraph3, 2:Results:paragraph4. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C 5", "text": "VHA and MarketScan cohorts with preventive visits associate HZ vaccination with 31–35% lower dementia hazard. Well-visit restriction and E-values do not prove absence of unmeasured bias; possible database overlap with other reports and product-specificity remain.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2", "SC3" ], "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": "C 6", "text": "Chinese cross-sectional 1233-person study associates past HZ with education-adjusted cognitive impairment; antiviral estimate is nonsignificant. Questionnaire history and simultaneous cognitive testing cannot establish temporality, diagnosed dementia prevention or antiviral efficacy.", "carries_number": true, "load_bearing_for": [ "SC3" ], "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": "C 7", "text": "Taiwan matched cohort associates HZ with HR 1.11 and antiviral prescriptions with lower dementia hazard. Treatment selection and diagnosis codes leave confounding; antiherpetic association is not randomized prevention or VZV necessity.", "carries_number": true, "load_bearing_for": [ "SC3", "SC4" ], "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": "C 8", "text": "UK CPRD cohort finds no increased dementia hazard after HZ, with null dementia-or-death composite and no antiviral variation. This challenges universal clinical-shingles mediation, while subclinical reactivation and vaccine-specific immune effects are not excluded.", "carries_number": false, "load_bearing_for": [ "SC3" ], "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": "C 9", "text": "Swedish registry associates overt HSV/VZV without treatment with greater dementia and antivirals with HR.89. Mixed herpes exposure, treatment indication and registry confounding do not isolate a necessary VZV path.", "carries_number": true, "load_bearing_for": [ "SC3", "SC4" ], "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": "C 10", "text": "Israeli drug-screen associations for atovaquone/proguanil and VZV vaccines recur in matched TriNetX cohorts. Medication-wide discovery, travel/health-user selection and exploratory interaction do not establish latent Toxoplasma mechanism or drug benefit.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3", "SC4" ], "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": "C 11", "text": "Kaiser matched cohort finds HZ-dementia HR.99; antiviral association attenuates to.88 with no duration/cumulative-dose trend. Null HZ association and unstable subgroup treatment signals limit universal mediation; treatment is not randomized.", "carries_number": true, "load_bearing_for": [ "SC3", "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": "C 12", "text": "Korean cohort associates HZ with adjusted HR 1.12 and antiviral-treated HZ with lower dementia hazard after matching. Shared national data platform can overlap other infection papers; measured treatment adjustment does not randomize therapy.", "carries_number": true, "load_bearing_for": [ "SC3", "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": "C 13", "text": "Welsh eligibility analysis extends signals to MCI and dementia-related deaths among people already diagnosed. Same eligibility/cohort as original study, not independent replication; progression and MCI are different scopes from dementia-free incident prevention.", "carries_number": false, "load_bearing_for": [ "SC2", "SC3" ], "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": "C 14", "text": "New quantitative reanalysis of published natural experiments reports implausibly large receipt-effect implications outside Wales and no corresponding national incidence drop. Aggregate uptake and comparator-risk assumptions do not directly reanalyse individual local compliers; critique must be resolved, not treated as automatic refutation of every eligibility result.", "carries_number": false, "load_bearing_for": [ "SC2" ], "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": "C 15", "text": "Australian age 80 eligibility discontinuity raises uptake 16.4 points and reduces new dementia diagnosis 1.8 points over 7.4 years. Abstract reports eligibility effect, not receipt relative risk; local cutoff population differs from overall sample mean age and underlying vaccine-effect critique remains.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "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": "C 16", "text": "Rapid product-transition comparison associates RZV with 17% more dementia-diagnosis-free time and 164 days among subsequently affected. Calendar-era treatment transition, measured matching and vaccine comparators are not randomized allocation; relative diagnosis-free time is not 17% risk reduction.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2", "SC3" ], "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": "C 17", "text": "FinnGen discovery and UKBiobank replication identify viral-exposure associations with later neurodegeneration. Hospital-coded infection severity, ascertainment and immune vulnerability remain; cross-disease association does not isolate VZV vaccination causality.", "carries_number": false, "load_bearing_for": [ "SC3" ], "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": "C 18", "text": "Large EHR analysis links recurrent HZ, vaccine dose and waning patterns to dementia associations after extensive adjustment. Temporal correlation of protection against HZ and dementia is not randomized mediator dissociation; shared TriNetX networks constrain independent-line counts.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3" ], "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": "C 19", "text": "Propensity-matched US claims associate influenza vaccination with lower 4 year AD diagnoses. Matched risk differences and calculated NNT are observational, not established clinical prevention or replication of the same zoster mechanism.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 20", "text": "Korean cohort associates COVID mRNA vaccination with more AD/MCI diagnoses within 3 months. Short latency and differential contact/diagnostic ascertainment cannot establish vaccine-caused neurodegeneration; a different product does not refute zoster effects.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 21", "text": "Matched cohorts associate both AS01-adjuvanted RSV and zoster vaccination with lower 18 month dementia risk, with no between-product difference. Nonsignificance is not equivalence; shared adjuvant, healthy uptake and selection cannot isolate AS01 necessity or direct adjuvant efficacy.", "carries_number": true, "load_bearing_for": [ "SC3", "SC4" ], "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": "C 22", "text": "VZV infection of quiescent HSV1 neural cultures reactivates HSV1 and AD-like amyloid/phosphotau changes; VZV alone lacks those main markers. Cell-marker phenotype is not human dementia or a necessary vaccine mediator; forced viral exposures retain system limits.", "carries_number": true, "load_bearing_for": [ "SC3" ], "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": "C 23", "text": "Kaiser RZV two-dose cohort has lower dementia hazard, attenuated from.49 versus unvaccinated to.73 versus Tdap. Vaccine active comparator reduces but does not eliminate bias; excluding early post-dose dementia changes eligibility/estimand, not randomized prevention.", "carries_number": true, "load_bearing_for": [ "SC1", "SC2" ], "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": "C 24", "text": "Optum matched Tdap/HZ/pneumococcal cohorts show lower AD risks over 8 years. Multiple protective vaccine associations are compatible with healthy-user or immune effects; common source population is not independent causation.", "carries_number": true, "load_bearing_for": [ "SC1", "SC4" ], "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": "C 25", "text": "Korean weighted live-vaccine cohort shows lower memory-disorder and AD hazards with modest restricted-mean-time gains. Initial 2.5 million frame differs from 1041964 analytic sample; dose/time and behaviour associations are not randomized mediation.", "carries_number": false, "load_bearing_for": [ "SC1" ], "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. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C 26", "text": "Medicare matched two-dose RZV cohorts show lower dementia/AD/vascular-dementia hazards across follow-up periods. Preventive-visit comparator and weights do not remove latent prodromal decline or healthcare-contact differences.", "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": "C 27", "text": "VHA influenza cohort associates repeated vaccination with lower dementia hazard, strongest for at least 6 vaccinations. Repeated adherence can reflect healthy-user selection and opportunity time; national VHA observations may overlap zoster reports.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 28", "text": "BRFSS survey links HZ vaccination with less reported social restriction from disorientation or memory loss. Self-reported cross-sectional social symptoms are not incident diagnosed dementia despite causal title wording; small selected sample.", "carries_number": false, "load_bearing_for": [ "SC1" ], "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": "C 29", "text": "Welsh vaccinated-versus-unvaccinated cohort has lower dementia and several other disease/mortality hazards without HZ-diagnosis mediation. Authors explicitly retain healthy-life-expectancy selection bias; same national setting overlaps later eligibility analyses.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2", "SC3" ], "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": "C 30", "text": "Danish long-term matched HZ cohort finds no increased dementia overall; rare CNS subgroup estimate is imprecise. Challenges overt-shingles universal mediation, not all subclinical immune pathways; CNS-attributable fraction is a model, not vaccine effect.", "carries_number": false, "load_bearing_for": [ "SC3" ], "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": "C 31", "text": "HRS sample associates multiple infections and adult vaccines with later AD more than other dementias. Pseudorandomized sampling is not randomized vaccination; common immune vulnerability and exposure ascertainment remain.", "carries_number": false, "load_bearing_for": [ "SC1", "SC3", "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": "C 32", "text": "Taiwan COPD cohort associates influenza vaccination frequency with lower dementia hazard. Chronic-disease selection, adherence opportunity and residual bias preclude clinical causal or universal-vaccine inference.", "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": "C 33", "text": "English immunosuppressed-adult cohort finds substantially lower RZV uptake in dementia, care homes and deprivation. Different clinical population and descriptive uptake do not estimate prevention, but demonstrate a plausible selection path for ordinary cohorts.", "carries_number": false, "load_bearing_for": [ "SC1", "SC2" ], "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": "C 34", "text": "Korean case-control histories show no positive HZ-neurodegenerative-dementia association. Retrospective coding and shared national platform constrain independence; inverse association is not proof HZ protects.", "carries_number": false, "load_bearing_for": [ "SC3" ], "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": "C 35", "text": "Taiwan CKD cohort associates influenza vaccination with lower dementia in both influenza and noninfluenza seasons. Stronger off-season association permits nonspecific effects or residual selection; recorded vaccines and dementia remain observational.", "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": "C 36", "text": "Korean HSV/VZV cohorts show modest adjusted increased dementia hazards, particularly AD. Shared registry and mixed virus subtypes do not establish mediation or explain conflicting UK/Danish results.", "carries_number": false, "load_bearing_for": [ "SC3" ], "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": "C 37", "text": "Antihypertensive-target MR finds limited evidence lowering systolic pressure affects AD risk. Lifelong instruments, exclusion assumptions and AD subtype differ from clinical BP-program all-dementia endpoints; null does not erase randomized prevention.", "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": "C 38", "text": "Drug-target VaD MR is largely null after multiple-testing correction, with tentative beta1/ACE signals. Tentative target proxies and imaging surrogates are not clinical drug efficacy or established pharmacovigilance harm.", "carries_number": true, "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": "C 39", "text": "Danish/German rheumatology cohorts have nonsignificant lower dementia estimates for TNF inhibitors. Clinical-indication confounding and wide confidence intervals leave no demonstrated preventive benefit; no equivalence conclusion.", "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": "C 40", "text": "Observational plus small randomized metformin cohorts show microbiome/metabolome changes and male-stratified memory correlations. Whole metformin-treated cohort ratio-cognition association is null; biomarker/correlation and sex stratification do not establish incident dementia prevention.", "carries_number": false, "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. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C 41", "text": "326-village randomized BP-care programme reduces all-cause dementia over 48 months in 33995 hypertensive adults. A genuine clinical prevention positive for its assigned care package, not proof of each antihypertensive molecule or the same vaccine mediator.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 42", "text": "Baseline statin use in ASPREE is not associated with dementia, MCI or cognitive decline. Statin exposure was observational even though parent aspirin trial was randomized; subgroup interaction does not create drug assignment.", "carries_number": false, "load_bearing_for": [ "SC4" ], "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": "C 43", "text": "VA target-trial emulation associates antihypertensive deprescribing with less cognitive-category decline in nursing-home residents. Frail baseline setting and many existing dementia cases differ from incident prevention; medication change selection remains.", "carries_number": false, "load_bearing_for": [ "SC4" ], "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": "C 44", "text": "GRADE randomized second-line diabetes agents show no cognitive-test differences over 4.1 years; glycemic exposure correlates with tests. No diagnosed dementia endpoint or placebo metformin contrast; association with HbA1c is not randomized glucose-mediator efficacy.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 45", "text": "OxHARP randomized crossover sildenafil has null primary cerebral pulsatility but better secondary perfusion/reactivity. Three-week surrogate benefit is not dementia prevention; crossover participants and secondary testing do not yield independent causal lines.", "carries_number": false, "load_bearing_for": [ "SC4" ], "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": "C 46", "text": "US semaglutide target emulation associates use with lower ADRD than several diabetic comparators. Confounding by indication, metabolic improvement and diagnosis remain; FTD/Lewy-body nulls prevent a uniform effect across dementias.", "carries_number": false, "load_bearing_for": [ "SC4" ], "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": "C 47", "text": "Statin emulation shows null overall 5 year dementia difference and exploratory genotype-defined subgroup signals. Data-derived treatment heterogeneity and all-dementia interval crossing zero do not validate a beneficiary group or randomized effect.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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. No complete-paper or supplement audit claimed.", "verified_on": "2026-10-13", "note": "" }, { "id": "C 48", "text": "Medicare GLP1-versus-DPP4 target emulation finds no clear overall dementia difference, with age-varying estimates. Wide compatible effects, unmeasured BMI/glycemia/duration and short follow-up limit efficacy or age-boundary inference.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 49", "text": "preDIVA antihypertensive-class associations attenuate by 10.4 years, with confidence intervals crossing null. Post-hoc medication exposures are not randomized drug classes; changing age/adherence and competing risks constrain attribution.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 50", "text": "SPRINT intensive BP assignment lowers MCI and composite cognitive impairment but not significant probable dementia. Early stopping and fewer dementia events limit power; positive composite must not replace null registered dementia endpoint.", "carries_number": false, "load_bearing_for": [ "SC4" ], "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": "C 51", "text": "SystEur randomized BP regimen reports 21 versus 11 dementia cases over 2 years atP=.05. Small borderline event set and multi-agent regimen do not establish each drug, longer horizon or zoster-equivalent mediation.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 52", "text": "HYVET original 3336-person comparison lowersBP without significant incident dementia benefit. Early stopping/short follow-up and confidence interval permit benefit; pooled meta-component is not counted as another primary experiment.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "C 53", "text": "ASPREE randomized aspirin in 19114 older adults shows no dementia/MCI/cognitive benefit over 4.7 years. No class-wide preventive drug conclusion follows; statin analyses share cohort but aspirin assignment is distinct.", "carries_number": true, "load_bearing_for": [ "SC4" ], "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": "CSC1", "text": "Vaccination precedes lower recorded dementia incidence in multiple ordinary cohorts. These descriptive associations retain Β; larger samples and extensive adjustment alone do not create causal assignment.", "carries_number": false, "load_bearing_for": [ "SC1" ], "source_ns": [ 1, 2, 3, 4, 5, 10, 15, 16, 18, 23, 24, 25, 26, 28, 29, 31, 33 ], "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 Welsh fuzzy eligibility discontinuity provides a positive local clinical causal-inference crossing, with strong first-stage uptake and baseline/placebo checks. Australian and Canadian eligibility analyses corroborate diagnosis differences but differ in receipt-effect identification and uptake precision. A 2026 quantitative challenge reports implausible implied effects outside Wales and deserves direct resolution. Δ is awarded for a restricted field-valid natural experiment, with Moderate confidence and no assertion of product-wide randomized confirmation.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 1, 2, 3, 4, 5, 13, 14, 15, 16, 23, 26, 29, 33 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC3", "text": "Clinical and subclinical VZV suppression, heterologous immune effects and healthcare pathways remain plausible. Infection cohorts conflict; neural-culture reactivation and vaccine-waning correlations do not independently isolate the necessary mediator. Same-uptake sex differences and observational AS01 comparisons do not prove an exclusive pathway.", "carries_number": false, "load_bearing_for": [ "SC3" ], "source_ns": [ 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17, 18, 21, 22, 29, 30, 31, 34, 36 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CSC4", "text": "Other vaccines and repurposed drugs have agent-specific evidence, not a uniform reproduction of the zoster effect. The randomized Chinese hypertension-care programme and borderline SystEur positive retain clinical benefit in their own scopes; SPRINT probable dementia, HYVET, aspirin and GRADE cognitive outcomes include nulls. The conjunctive class transfer remains Γ, without downgrading those separate successes.", "carries_number": false, "load_bearing_for": [ "SC4" ], "source_ns": [ 7, 9, 10, 11, 12, 19, 20, 21, 24, 27, 31, 32, 35, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53 ], "verification": "verified", "verified_against": "Synthesis of examined primary result/limit cards; framework level is adjudication.", "verified_on": "2026-10-13", "note": "" }, { "id": "CH", "text": "Shingles vaccination has promising local causal evidence for preventing or delaying dementia diagnoses; product-wide efficacy, causal magnitude and the mediator remain unsettled.", "carries_number": false, "load_bearing_for": [ "SC2" ], "source_ns": [ 1, 2, 14, 16 ], "verification": "verified", "verified_against": "Bounded synthesis of examined sources; score is adjudication.", "verified_on": "2026-10-13", "note": "" } ], "citation_ledger": [ { "n": 1, "citation": "Eyting M, Xie M, Michalik F et al. 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Recombinant zoster vaccine and the risk of dementia. Vaccine. 2025.", "tier": "A", "kind": "primary", "pmid": "39733478", "doi": "10.1016/j.vaccine.2024.126673", "url": "https://pubmed.ncbi.nlm.nih.gov/39733478/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Optum_OLDW_possible_overlap", "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:paragraph2, 1:Methods:paragraph4, 1:Methods:paragraph6, 2:Results:paragraph3, 2:Results:paragraph4. No complete-paper or supplement audit claimed.", "carries_claims": [ "C 4", "CSC1", "CSC2", "CSC3" ] }, { "n": 5, "citation": "Scherrer J, Salas J, Jacobs C et al. Lower dementia risk in patients vaccinated against herpes zoster. Annals of family medicine. 2022.", "tier": "A", "kind": "primary", "pmid": "36696249", "doi": "10.1370/afm.20.s1.2680", "url": "https://pubmed.ncbi.nlm.nih.gov/36696249/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "VHA_and_MarketScan", "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": [ "C 5", "CSC1", "CSC2", "CSC3" ] }, { "n": 6, "citation": "Zheng B, Cao W, Zhang L et al. Association between herpes zoster and cognitive impairment among Chinese community-dwelling elderly: a cross-sectional study. BMC public health. 2026.", "tier": "A", "kind": "primary", "pmid": "42443821", "doi": "10.1186/s12889-026-28485-9", "url": "https://pubmed.ncbi.nlm.nih.gov/42443821/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42443821", "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": [ "C 6", "CSC3" ] }, { "n": 7, "citation": "Chen VC, Wu SI, Huang KY et al. Herpes Zoster and Dementia: A Nationwide Population-Based Cohort Study. The Journal of clinical psychiatry. 2018.", "tier": "A", "kind": "primary", "pmid": "29244265", "doi": "10.4088/JCP.16m11312", "url": "https://pubmed.ncbi.nlm.nih.gov/29244265/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID29244265", "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": [ "C 7", "CSC3", "CSC4" ] }, { "n": 8, "citation": "Warren-Gash C, Williamson E, Shiekh SI et al. No evidence that herpes zoster is associated with increased risk of dementia diagnosis. Annals of clinical and translational neurology. 2022.", "tier": "A", "kind": "primary", "pmid": "35170873", "doi": "10.1002/acn3.51525", "url": "https://pubmed.ncbi.nlm.nih.gov/35170873/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID35170873", "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": [ "C 8", "CSC3" ] }, { "n": 9, "citation": "Lopatko Lindman K, Hemmingsson ES, Weidung B et al. Herpesvirus infections, antiviral treatment, and the risk of dementia-a registry-based cohort study in Sweden. Alzheimer's & dementia (New York, N. Y.). 2021.", "tier": "A", "kind": "primary", "pmid": "33614892", "doi": "10.1002/trc2.12119", "url": "https://pubmed.ncbi.nlm.nih.gov/33614892/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID33614892", "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": [ "C 9", "CSC3", "CSC4" ] }, { "n": 10, "citation": "Israel A, Weizman A, Israel S et al. Atovaquone/proguanil use and zoster vaccination are associated with reduced Alzheimer's disease risk in two cohorts: implications for a latent Toxoplasma gondii mechanism. Brain, behavior, and immunity. 2026.", "tier": "A", "kind": "primary", "pmid": "41619985", "doi": "10.1016/j.bbi.2026.106473", "url": "https://pubmed.ncbi.nlm.nih.gov/41619985/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Israel_and_TriNetX_possible_overlap", "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": [ "C 10", "CSC1", "CSC3", "CSC4" ] }, { "n": 11, "citation": "Weinmann S, Rawlings A, Koppolu P et al. Herpes zoster diagnosis and treatment in relation to incident dementia: A population-based retrospective matched cohort study. PloS one. 2024.", "tier": "A", "kind": "primary", "pmid": "38271405", "doi": "10.1371/journal.pone.0296957", "url": "https://pubmed.ncbi.nlm.nih.gov/38271405/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID38271405", "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": [ "C 11", "CSC3", "CSC4" ] }, { "n": 12, "citation": "Bae S, Yun SC, Kim MC et al. Association of herpes zoster with dementia and effect of antiviral therapy on dementia: a population-based cohort study. European archives of psychiatry and clinical neuroscience. 2021.", "tier": "A", "kind": "primary", "pmid": "32613564", "doi": "10.1007/s00406-020-01157-4", "url": "https://pubmed.ncbi.nlm.nih.gov/32613564/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID32613564", "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": [ "C 12", "CSC3", "CSC4" ] }, { "n": 13, "citation": "Xie M, Eyting M, Bommer C et al. The effect of shingles vaccination at different stages of the dementia disease course. Cell. 2025.", "tier": "A", "kind": "secondary_analysis", "pmid": "41338191", "doi": "10.1016/j.cell.2025.11.007", "url": "https://pubmed.ncbi.nlm.nih.gov/41338191/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Welsh_eligibility_SAIL", "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": [ "C 13", "CSC2", "CSC3" ] }, { "n": 14, "citation": "Kivimäki M, Frank P, Livingston G et al. Natural experiments of herpes zoster vaccination: Quantifying the implied vaccine effectiveness against dementia. Brain, behavior, and immunity. 2026.", "tier": "A", "kind": "secondary_analysis", "pmid": "42754179", "doi": "10.1016/j.bbi.2026.107021", "url": "https://pubmed.ncbi.nlm.nih.gov/42754179/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID42754179", "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": [ "C 14", "CSC2", "CH" ] }, { "n": 15, "citation": "Pomirchy M, Bommer C, Pradella F et al. Herpes Zoster Vaccination and Dementia Occurrence. JAMA. 2025.", "tier": "A", "kind": "natural_experiment", "pmid": "40267506", "doi": "10.1001/jama.2025.5013", "url": "https://pubmed.ncbi.nlm.nih.gov/40267506/", "status_flags": [ "UpdateOf: PMID38978672" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "Australian_PrimaryCare_eligibility", "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": [ "C 15", "CSC1", "CSC2" ] }, { "n": 16, "citation": "Taquet M, Dercon Q, Todd JA et al. The recombinant shingles vaccine is associated with lower risk of dementia. 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Journal of hypertension. 2023.", "tier": "A", "kind": "primary", "pmid": "36394298", "doi": "10.1097/HJH.0000000000003324", "url": "https://pubmed.ncbi.nlm.nih.gov/36394298/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID36394298", "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": [ "C 49", "CSC4" ] }, { "n": 50, "citation": "SPRINT MIND Investigators for the SPRINT Research Group, Williamson JD, Pajewski NM et al. Effect of Intensive vs Standard Blood Pressure Control on Probable Dementia: A Randomized Clinical Trial. 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Lancet (London, England). 1998.", "tier": "A", "kind": "rct", "pmid": "9802273", "doi": "10.1016/s0140-6736(98)03086-4", "url": "https://pubmed.ncbi.nlm.nih.gov/9802273/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID9802273", "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": [ "C 51", "CSC4" ] }, { "n": 52, "citation": "Peters R, Beckett N, Forette F et al. Incident dementia and blood pressure lowering in the Hypertension in the Very Elderly Trial cognitive function assessment (HYVET-COG): a double-blind, placebo controlled trial. The Lancet. Neurology. 2008.", "tier": "A", "kind": "rct", "pmid": "18614402", "doi": "10.1016/S1474-4422(08)70143-1", "url": "https://pubmed.ncbi.nlm.nih.gov/18614402/", "status_flags": [ "none_found" ], "opened": true, "opened_on": "2026-10-13", "status_checked_on": "2026-10-13", "study_id": "PMID18614402", "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": [ "C 52", "CSC4" ] }, { "n": 53, "citation": "Ryan J, Storey E, Murray AM et al. Randomized placebo-controlled trial of the effects of aspirin on dementia and cognitive decline. 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Shared Welsh endpoints, overlapping national datasets and repeated eligibility designs are conservatively grouped; the inference does not count papers as independent causal lines." }, "gamma_hard_rules_considered": [ { "subclaim_id": "SC1", "rule_quoted": "In vitro aggregation alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC1", "rule_quoted": "In vitro seeding alone", "trigger_status": "Not triggered literally for this assembled scoped case. Any adapted clinical, proxy or system-inference restriction is stated separately in the subclaim rationale." }, { "subclaim_id": "SC1", "rule_quoted": "Droplet aging in vitro", "trigger_status": "Not triggered literally for this assembled scoped case. 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It uses a local complier counterfactual-risk construction and not a simple division of the overall control risk. Diagnosis sources and lack of primary competing-death adjustment are explicit.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/40175543/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-0-10-3000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\body-presentation-receipts\\40175543-s6-p4-8-10-12.json", "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\body-presentation-receipts\\40175543-s8-p6-7-8-12-14-15.json" ] }, { "pmid": "41579903", "doi": "10.1016/S1474-4422(25)00455-7", "source_type": "primary study report", "study_group": "Canadian_CPCSSN_CHSS", "access_depth": "full_text_partial", "consensus_aspect": "Consensus describes Ontario 2.0 point diagnosis reduction and female-predominant protection.", "result_comparison": "Selected original Methods/Results confirm the eligibility estimand, uptake from a separate CHSS survey, primary 27.4 point first stage with lower CI 0.0 and secondary 13.9 point interval crossing zero. Women-significant/men-nonsignificant has interaction P=.218; this cannot establish a verified sex boundary.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/41579903/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-0-10-3000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\body-presentation-receipts\\41579903-s1-p2-4-5.json", "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\body-presentation-receipts\\41579903-s2-p1-3-5-7.json" ] }, { "pmid": "39053634", "doi": "10.1038/s41591-024-03201-5", "source_type": "primary study report", "study_group": "PMID39053634", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus says recombinant vaccination is associated with 17% delay and 164 days.", "result_comparison": "The original reports 17% increase in diagnosis-free time, with 164 days among participants subsequently diagnosed, not 17% relative risk reduction in all recipients. Calendar transition and active vaccine matching remain observational limitations.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/39053634/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-10-20-3000.json" ], "body_receipts": [] }, { "pmid": "42754179", "doi": "10.1016/j.bbi.2026.107021", "source_type": "primary study report", "study_group": "PMID42754179", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus includes the 2026 critique of implausibly large implied vaccine effectiveness, labelling its claim weak.", "result_comparison": "The original new quantitative secondary analysis reports 18% Wales, 177% Australia and 84%/111% Canada under its published-estimate scaling. These are analytical estimates rather than new vaccine trials. Their denominator/complier-risk assumptions require reconciliation with the Welsh local CACE method; provider strength labels do not adjudicate the critique.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/42754179/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-10-20-3000.json" ], "body_receipts": [] }, { "pmid": "42296498", "doi": "10.7326/ANNALS-25-04689", "source_type": "primary study report", "study_group": "PMID42296498", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus says recombinant vaccination lowered nursing-home four-year dementia incidence by about 5.8 points.", "result_comparison": "The original reports an association in a clone-censor-weight emulation, with negative controls suggesting residual confounding. Only 1.73% received vaccine and 87% of these did so after discharge; wording is qualified to association rather than proven lowering.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/42296498/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-0-10-3000.json" ], "body_receipts": [] }, { "pmid": "40562756", "doi": "10.1038/s41541-025-01172-3", "source_type": "primary study report", "study_group": "PMID40562756", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus interprets similar AS01-adjuvanted RSV/zoster protection as an adjuvant-specific mechanism.", "result_comparison": "The original is a matched observational comparison with no significant product difference. Nonsignificance is not equivalence, and sharing an adjuvant is not a randomized adjuvant-versus-virus dissociation; the mechanism remains a hypothesis.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/40562756/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-20-30-2800.json" ], "body_receipts": [] }, { "pmid": "35170873", "doi": "10.1002/acn3.51525", "source_type": "primary study report", "study_group": "PMID35170873", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus contrasts VZV-suppression and immune explanations but emphasizes positive reactivation/antiviral links.", "result_comparison": "The original UK cohort reports no increased dementia after overt HZ, no dementia-or-death association, and no antiviral prescription variation. This important challenge is retained alongside positive registry studies and does not itself exclude subclinical viral effects.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/35170873/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-0-10-3000.json" ], "body_receipts": [] }, { "pmid": "40258956", "doi": "10.1038/s41591-025-03616-8", "source_type": "primary study report", "study_group": "PMID40258956", "access_depth": "abstract_metadata", "consensus_aspect": "Consensus says other preventive drugs do not produce broad class effects, without supplying the named randomized hypertension result.", "result_comparison": "The original 326-village randomized care programme significantly lowers all-cause dementia over 48 months. This genuine clinical prevention positive is preserved for its exact package, alongside SPRINT dementia-null/MCI-positive and aspirin/HYVET nulls; it neither validates nor refutes vaccination.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/40258956/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-40-50-3000.json" ], "body_receipts": [] }, { "pmid": "40175543", "doi": "10.1038/s41586-025-08800-x", "source_type": "primary study report", "study_group": "Welsh_eligibility_SAIL", "access_depth": "full_text_partial", "consensus_aspect": "Consensus discovers an English regression-discontinuity study with shingles reduction and dementia null.", "result_comparison": "The original medRxiv repository abstract was independently read: Hamilton et al. 2026 doi 10.64898/2026.07.20.26358345v1 is explicitly unreviewed. It reports hospital-dementia eligibility RD −0.06 points,CI −0.40 to 0.27, P=.72, including Welsh ascertainment comparisons. It is retained as a separate non-counted preprint challenge, with no invented original Methods reading or inclusion among 53 peer-reviewed reports.", "original_source": "https://pubmed.ncbi.nlm.nih.gov/40175543/", "source_examination_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\examinations\\original-0-10-3000.json" ], "body_receipts": [ "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\body-presentation-receipts\\40175543-s6-p4-8-10-12.json", "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\body-presentation-receipts\\40175543-s8-p6-7-8-12-14-15.json" ] } ], "grade_changed": false, "grade_change_note": "Source-based adjudication; no independent blinded regrade claimed.", "raw_receipts": [ { "path": "deliverables\\hsef_v53_traffic_ranks_16_20_2026-10-13\\shingles-vaccination-dementia\\consensus-browser-2026-10-13.json", "sha 256": "288b10c22e7defd7108d2d1819d69bf5d7293546049673a569992a57a5610f05", "sha256": "288b10c22e7defd7108d2d1819d69bf5d7293546049673a569992a57a5610f05", "checksum_recorded_on": "2026-10-14", "checksum_note": "Checksum measured during documentary correction; not represented as a historical capture-time checksum" } ], "independent_blinded_audit": false, "cutoff": "2026-10-13", "completed_utc": "2026-10-13 T 17:35:23.337103+00:00", "conclusion": "Endpoint hierarchy, experimental scope and original-source limits determine the evidence cards; provider wording does not override them." } }