27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
The sample included 3 329 977 beneficiaries (2 126 290 [63.9%] female, 33 887 [1.0%] Asian, 354 771 [10.7%] Black, 61 515 [1.8%] Hispanic, 2 831 391 [85.0%] White, and 891 815 [26.8%] dual eligible for Medicaid). 5 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A total of 807 K-ROAD participants (median age 72.0 years, 58.7% female) and 230 ADNI participants (median age 70.9 years, 49.1% female) were analyzed. 5 key findings →
Design: cohort study Participants: 807 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Using the Swedish BioFINDER-2 cohort [n = 1702, 50.7% male, mean (standard deviation) age 68.4 (12.2) years], we compared the associations between tau/Aβ-PET load and fluid biomarkers alone versus biomarkers in a ratio with a reference protein (Aβ40 or np-tau) in univariate linear regression models. 5 key findings →
Design: longitudinal study Participants: 1,702 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
In a total of 602 autopsy cases (median [IQR] age at death, 78 [71-85] years; 328 male [54.5%] and 274 female [45.5%]), higher PM2.5 exposure prior to death was associated with increased odds of more severe Alzheimer disease neuropathologic change (ADNC) (odds ratio, 1.19; 95% CI, 1.11-1.28). 5 key findings →
Design: cohort study Participants: 602 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Varicella-zoster virus (VZV) is a neurotropic virus that establishes lifelong latency in humans. 4 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Among 2946 participants (mean [SD] age, 74.9 [4.6] years; 1751 [59.4] female; 637 Black [21.6%] and 2309 White [78.4%] individuals), 1947 participants (66.1%) had audiometric hearing loss, and 1097 (37.2%) had self-reported hearing loss. 5 key findings →
Design: cohort study Participants: 2,946 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
The study population consisted of 27 172 adults, including 4256 adults (14.0%) residing in rural areas, 14 741 (54.8%) in small or medium metropolitan areas, and 8175 (31.2%) in urban areas. 5 key findings →
Design: cross-sectional Participants: 172 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The study sample included 1,375 participants free of dementia and stroke at baseline (mean age 68 ± 6y, 54 % females). 5 key findings →
Design: cohort study Participants: 1,375 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A total of 3828 titles and abstracts and 434 full-text articles were reviewed, yielding 12 articles meeting eligibility criteria. 5 key findings →
Design: systematic review Participants: 694 Evidence: high
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Distinct associations between different traffic noise exposures and incident dementia subtypes were found in this large UK prospective cohort study. 3 key findings →
Design: cohort study Participants: 502,416 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Comorbid cardiovascular and metabolic risk factors (CVM) differentially impact brain structure and increase dementia risk, but their specific magnetic resonance imaging signatures (MRI) remain poorly characterized. 1 key finding →
Design: cohort study Participants: 37,096 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A total of 60 860 adults with type 2 diabetes and obesity were included, with 30 430 each in the GLP-1RA group (mean [SD] age, 57.9 [9.9] years; 50.2% female) and the other antidiabetic drug group (mean [SD] age, 58.0 [10.8] years; 51.4% female) after propensity score matching. 5 key findings →
Design: cohort study Participants: 860 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Neurodegenerative diseases (NDs), such as Alzheimer’s disease (AD), Parkinson’s disease (PD) and frontotemporal dementia (FTD), exhibit distinct yet overlapping pathological mechanisms. 2 key findings →
Participants: 10,527 Evidence: low
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While sex differences were not apparent at asymptomatic stages, females showed more rapid declines across all outcomes in symptomatic stages compared to males. 5 key findings →
Design: longitudinal study Participants: 337 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
DOPA Decarboxylase (DDC) has been proposed as a cerebrospinal fluid (CSF) biomarker with increased concentrations in Lewy body disorders (LBDs) and highest levels in patients receiving dopaminergic treatment. 2 key findings →
Design: longitudinal study Participants: 71 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Common variants within TMEM106B are associated with risk for frontotemporal lobar degeneration with TDP-43 pathology (FTLD-TDP). 4 key findings →
Design: cohort study Participants: 518 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Three progression clusters emerged in both cohorts: stable cognition, slow decline, and rapid decline-each including cases initially classified as CN or MCI. 5 key findings →
Design: longitudinal study Participants: 186 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease is a progressive neurodegenerative disorder with no cure, making preventive strategies crucial. 5 key findings →
Design: cohort study Participants: 1,500 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Critical outcomes were rate of falls (number of falls per unit time) and number of fallers (risk of experiencing one or more falls). 5 key findings →
Participants: 104 Evidence: high
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In those aged 65 years or older, delirium was overall associated (all p<0·001, age and sex adjusted) with dementia ( adj OR 3·63 [95% CI 2·65–4·98]), pre-admission dependency (2·63 [2·02–3·43]), comorbidity burden (1·04 [1·02–1·05]), and frailty (moderate vs low risk 3·62 [2·70–4·85] and high vs low risk 11·85 [7·24–19·42]), with stronger associations in patients without comorbid dementia than in those with comorbid dementia. 4 key findings →
Design: longitudinal study Participants: 290 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Obesity and Area Deprivation Index, a measure of socioeconomic status, were significantly associated with elevated AD risk within the hypertensive cohort. 4 key findings →
Design: retrospective cohort Participants: 1,862 Evidence: moderate
Full summary, score breakdown and related studies → Original source
Plasma p-tau217 was associated with concurrent Aβ in most cortical regions and tau in temporo-parietal cortices. 3 key findings →
Design: cross-sectional Participants: 333 Evidence: moderate
Full summary, score breakdown and related studies → Original source
E280A carriers had higher p-tau231 levels than non-carriers (9.0 ± 7.4 vs. 5.2 ± 3.4 pg/mL, P < 0.001). 5 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source
Serum p-tau217 levels were increased in individuals with iRBD and cognitive impairment (CI) on testing defined as Montreal Cognitive Assessment <26 or subthreshold parkinsonism. p-Tau217 differentiated individuals with iRBD who developed PD with CI (PD-CI) or DLB from PD phenoconverters with normal cognition (area under curve [AUC] = 0.82; 95% confidence interval, 0.70-0.93) and from iRBD non-phenoconverters with normal cognition (AUC = 0.83; 95% confidence interval, 0.77-0.89). 4 key findings →
Participants: 300 Evidence: low
Full summary, score breakdown and related studies → Original source
Plasma levels of glial fibrillary acidic protein (GFAP) and neurofilament light (NEFL) are key dementia biomarkers. 3 key findings →
Participants: 50,000 Evidence: moderate
Full summary, score breakdown and related studies → Original source
Free full text links and the Full text may need a subscription label come from Unpaywall, Europe PMC and OpenAlex records of free copies, checked 10 Oct 2026. A study with neither is unknown, not paywalled. Show only studies that are free to read
This is alzhub's own score. It is not an official metric, not an impact factor, and no journal, publisher or ranking body endorses it. We built it so that a reader who is not a scientist can tell a landmark trial from a conference abstract without having to already know the difference. Every point comes from one of 20 components, all of them printed on the study itself, so you can disagree with our arithmetic rather than having to trust the total.
Journals are placed in ordered tiers, never given a numeric impact factor — we could not verify current impact factors from a source we control, and an invented one would be worse than none. Tier 1 is the top-tier general journals (NEJM, The Lancet, JAMA, Nature, Science, Nature Medicine); tier 2 is the leading specialty journals; tier 3 is every other peer-reviewed journal. A separate part scores how much the journal's own papers are cited, which tells the tier-3 journals apart.
Two rules we don't bend. First, we never fill in a missing value: if a record does not state a sample size or a design, that component scores zero, and if we simply have no data for a part, such as a citation count, that part is left out and the study is scored on the parts we could check. The study card says which. Second, anything that is not a peer-reviewed article is capped at 16/100 and carries a warning chip — so a conference abstract or a company press release can never outrank a peer-reviewed paper, no matter how good it looks.
We rank a rigorous null result — a good trial showing that something does not work — above an early positive finding. Someone deciding whether to buy a supplement is served by that, and the rigour is already counted by the design and journal components.
The score is computed from the published data alone and is reproducible: the same file always yields the same numbers.
See the whole rubric drawn out → — four charts covering all 27,380 studies: how the scores are spread and where the cap bites, which of the 20 components the library is strong and weak on, which subjects rest on stronger evidence, and what kinds of study each subject is actually built from.
This is a large sample of the Alzheimer's literature, not an exhaustive index of it. It holds 27,380 records, built mostly from automated pulls of Europe PMC (60.6% of the library) and OpenAlex (18.6%), plus smaller pulls from PubMed, Crossref and medRxiv. If a study, a drug, or a finding isn't here, that is not evidence it doesn't exist in the literature — it may simply not have been pulled in yet.
1,032 records (3.8% of the library) are not peer-reviewed — 962 of those are preprints posted before any journal review, and the rest are conference abstracts, regulatory notices and reports. Every study card on this page states its status plainly, and the score above is capped for anything that isn't a peer-reviewed article.
See the full, machine-readable breakdown of this library's coverage →