27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
The double-cutoff approach revealed high confidence for interpreting scans as negative when Centiloid values were lower than 11 (95% CI, 9-13; I2 = 95%) and interpreting scans as positive if Centiloid values were higher than 26 (95% CI, 24-28; I2 = 95%). 3 key findings →
Design: meta-analysis Participants: 49,227 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Synthesis methods We meta-analysed results for each outcome within each comparison using the inverse variance method and the random-effects model. 5 key findings →
Design: meta-analysis Participants: 20,342 Evidence: high
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Greater consumption of caffeinated coffee and tea was associated with lower risk of dementia and modestly better cognitive function, with the most pronounced association at moderate intake levels. 5 key findings →
Design: cohort Participants: 131,821 Evidence: moderate
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Midlife and late-life risk factors contributed to 22.7% and 16.5% of total dementia cases, respectively. 5 key findings →
Design: meta-analysis Participants: 37,931 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
We aimed to determine the effect of live attenuated herpes zoster vaccination on incident dementia diagnoses among people aged 70 years and older using a natural experiment in Ontario, Canada, and to triangulate these findings, using a second natural experiment in Ontario and a quasi-experimental approach that uses data from multiple Canadian provinces. 3 key findings →
Design: cohort Participants: 232,124 Evidence: moderate
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Of the 120 participants (mean age, 71.4 [SD, 8.6] years; 55% were female), 93 (77.5%) completed the trial. 1 key finding →
Design: phase-2-trial Participants: 120 Evidence: null result
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In this prospective cohort study, we included adults aged 40 years or older with subjective cognitive decline, mild cognitive impairment, or dementia, based on cognitive test results and clinical assessments, consecutively recruited at two memory clinics in Sweden, as part of the Swedish BioFINDER-2 study. 3 key findings →
Design: cohort Participants: 572 Evidence: high
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These findings demonstrate that plasma p-tau217 can reliably detect AD pathology in the preclinical stage. 4 key findings →
Design: systematic review Participants: 7,834 Evidence: high
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Among 80 participants (mean [SD] age, lithium: 72.93 [8.77] years; placebo: 71.22 [6.47] years; 56% female), none of the 6 coprimary outcomes met the prespecified significance threshold. 2 key findings →
Participants: 170 Evidence: high
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Between May 18, 2021, and Sept 8, 2023, 9981 participants were screened, of whom 3808 were randomly assigned; 1855 in evoke (semaglutide, n=928; placebo, n=927) and 1953 in evoke+ (semaglutide, n=976; placebo, n=977). 5 key findings →
Design: clinical trial Participants: 928 Evidence: high
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Cognitive training involving speed of cognitive processing has the potential to delay the diagnosis of ADRD. 1 key finding →
Design: randomized controlled trial Participants: 2,021 Evidence: high
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Across the cohorts, each 10-year increase in BAI was associated with a 39% higher risk of incident dementia (hazard ratio [HR], 1.39 [95% CI, 1.21-1.59]; P Conclusions and relevance In this IPD meta-analysis, a higher sleep EEG-based BAI was associated with a higher risk of incident dementia. 3 key findings →
Design: meta-analysis Participants: 7,105 Evidence: moderate
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Predicting not just if, but also when, cognitively unimpaired individuals are likely to develop onset of Alzheimer's disease (AD) symptoms would be useful to clinical trials and, eventually, clinical practice. 2 key findings →
Design: cohort Participants: 603 Evidence: moderate
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Main results We included 82 studies with 10,613 participants; 72 studies with 9783 participants provided extractable data. 5 key findings →
Design: meta-analysis Participants: 10,613 Evidence: moderate
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Among 2766 participants (mean [SD] age, 69.9 [3.8] years; 486 [17.9%] Black, 196 [7.1%] Hispanic, and 2007 [73.9%] White), 1311 developed the combined end point of MCI or dementia (849 participants with MCI and 752 participants with dementia). 5 key findings →
Design: cohort Participants: 2,766 Evidence: moderate
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Over a median follow-up of 10·0 years (IQR 5·1-21·3), high physical activity levels were associated with reduced risks of all-cause dementia (n=146 effect sizes; RR 0·80 [95% CI 0·75-0·86]; I 2 =97·4%), Alzheimer's disease (n=59; 0·79 [0·70-0·90]; I 2 =91·3%), and vascular dementia (n=21; 0·71 [0·58-0·87]; I 2 =77·5%); however, associations varied by domain. 3 key findings →
Design: meta-analysis Participants: 4,227,297 Evidence: high
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These findings provide evidence for a relationship between all types of alcohol use and increased dementia risk. 5 key findings →
Design: cohort Participants: 559,559 Evidence: moderate
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These findings add to growing evidence that women have a differential tau response to Aβ that may emerge at the point of p-tau secretion. 5 key findings →
Design: cohort Participants: 1,292 Evidence: moderate
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The BioFINDER-2 main cohort included 872 participants, with an additional 156 participants in the Knight ADRC cohort for independent validation. 2 key findings →
Design: cohort Participants: 1,028 Evidence: high
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Vaccines to prevent herpes zoster have been associated with reduced dementia risk. 5 key findings →
Design: cohort study Participants: 65,800 Evidence: moderate
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Among 12,327 patients who underwent randomization (6162 to the asundexian group and 6165 to the placebo group), the incidence of ischemic stroke was lower in the asundexian group than in the placebo group (6.2% vs. 8.4%; cause-specific hazard ratio, 0.74; 95% confidence interval [CI], 0.65 to 0.84; P<0.001). 5 key findings →
Design: clinical trial Participants: 12,327 Evidence: low
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Although no overall EF benefit was observed, RE improved attentional/inhibitory control in cognitively normal older adults. 4 key findings →
Design: RCT Participants: 90 Evidence: null result
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In a pooled sample of multiple selected cohorts of cognitively unimpaired older adults, higher plasma p-tau217 levels were consistently associated with increased risk of clinical progression and accelerated cognitive decline. 5 key findings →
Design: cohort Participants: 2,684 Evidence: high
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Of 23 558 people without pre-existing dementia, 4135 (17·6%) had an admission with delirium. 5 key findings →
Design: cohort Participants: 23,558 Evidence: moderate
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Frailty, comorbidities, and other age-related diseases were associated with a higher risk of dementia but did not account for the elevated dementia risk observed after severe infections. 3 key findings →
Design: cohort Participants: 449,223 Evidence: moderate
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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.
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 →