27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Selenium is a trace element associated with antioxidant activity and is considered to be a protective agent against free radicals through enhanced enzyme activity. 5 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Hispanics/Latinos are the largest ethnic/racial group in the United States and at high risk for Alzheimer's disease and related dementia (ADRD). 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The association between educational attainment and decline in cognitive function over an interval of 1 year was examined for 14,883 subjects 18 years and older in the National Institute of Mental Health Epidemiologic Catchment Area Study. 4 key findings →
Participants: 14,883 Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Hypothyroidism and subclinical hyperthyroidism have both been associated with cognitive impairment and dementia. 4 key findings →
Participants: 1,047 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Clinical studies have shown alterations in metabolic profiles when patients with mild cognitive impairment and Alzheimer's disease dementia were compared to cognitively normal subjects. 4 key findings →
Participants: 1,534 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Exposure to high neighborhood‐level socioeconomic disadvantage is associated with negative health outcomes. 5 key findings →
Design: longitudinal study Participants: 645 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Neighborhood disadvantage was associated with worse cognitive performance on memory, executive function, processing speed, and preclinical Alzheimer's tests on both datasets. 5 key findings →
Participants: 524 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
In their study, Chen et al 1 examined the association between apolipoprotein E (APOE) genotype and longitudinal cognitive trajectories among middle-aged and older East Asian adults participating in the Healthy Aging Longitudinal Study of Taiwan (HALST).Although sporadic late-onset Alzheimer disease (AD) is polygenic, APOE remains the strongest genetic determinant of AD risk, with carriers of the APOE ε4 allele having increased odds of developing AD dementia in a dose-dependent manner compared with APOE ε3 homozygotes. 1 key finding →
Design: longitudinal study Participants: 21 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
All Hispanic/Latino immigrant adults, regardless of age at migration, have a cognitive health disadvantage (at each visit and over time) relative to U.S./mainland-born Hispanic/Latino individuals. 5 key findings →
Participants: 16,415 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous persistent organic pollutants. 5 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A total of 6321 participants (mean [SE] age, 56.1 [0.18] years at visit 1; n = 4077 women [57.8%]) were included. 5 key findings →
Design: cohort study Participants: 4,077 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Multivariable Firth penalized logistic regression identified factors associated with baseline functional impairment. 5 key findings →
Design: longitudinal study Participants: 22 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Among older adults, MeDi adherence was associated with less brain atrophy, with an effect similar to 5 years of aging. 5 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source
This study aimed to evaluate the efficacy of a multifactorial 'healthy brain ageing cognitive training program' for Parkinson's disease. 3 key findings →
Participants: 50 Evidence: high
Full summary, score breakdown and related studies → Original source
Both groups showed significant improvements in all cognitive function measurements (P<.001). 3 key findings →
Participants: 18 Evidence: low
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) and other dementias are now the seventh leading cause of death in the world and are projected to affect 115.4 million people by 2050. 1 key finding →
Evidence: high
Full summary, score breakdown and related studies → Original source
Computer-based cognitive training might have beneficial effects on the general cognitive functions in early stage of Alzheimer's dementia. 4 key findings →
Participants: 20 Evidence: low
Full summary, score breakdown and related studies → Original source
Adherence to the MIND diet was associated with better cognitive function at baseline and over 8 years of follow-up; however, MIND diet was not associated with 8-year cognitive trajectory. 4 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source
The secreted peptide adropin is highly expressed in human brain tissues and correlates with RNA and proteomic risk indicators for dementia. 2 key findings →
Participants: 452 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Twenty-five of 33 (75.8%) participants in the qigong group and 26 of 33 (78.8%) participants in the control group completed the 1-year exercise programs. 4 key findings →
Participants: 33 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease (AD) is generally understood as primarily affecting cognition while sparing motor function, at least until the later stages of the disease. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The current study examined the relationship between cognitive function and falls in older people who did not meet criteria for dementia or mild cognitive impairment (N = 172). 5 key findings →
Participants: 172 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Falls remain common in older people, with higher prevalence and morbidity in those who are cognitively impaired. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Physical activity improves overall health and reduces the risk of many negative health outcomes and may be effective in improving cognition, independent functioning, and psychological health in older adults. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Cognitive impairment can be influenced by a number of factors. 5 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
9 of the 1,130 studies in this tag, picked by a fixed rule (a hash of each study's address), not by score or date; each page of this list shows a different 9. The same 9 appear here every time.
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 →