Collecting cases for case-control genetic association studies can be time-consuming and expensive. 1 key finding →
Design: meta-analysis Participants: 116,196 Evidence: high
Full summary, score breakdown and related studies → Original source
Research
27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Late-onset Alzheimer's disease is a prevalent age-related polygenic disease that accounts for 50-70% of dementia cases. 4 key findings →
Design: meta-analysis Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
For ACD, novel loci identified were associated with energy transport (SEMA4D), neuronal excitability (ANO3), amyloid deposition in the brain (RBFOX1), and magnetic resonance imaging markers of small vessel disease (SVD; HBEGF). 5 key findings →
Participants: 800,597 Evidence: low
Full summary, score breakdown and related studies → Original source
Iron deposition in the brain is a prominent feature of Alzheimer's disease (AD). 3 key findings →
Design: meta-analysis Participants: 24,000 Evidence: high
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) is the most common neurodegenerative disease. 2 key findings →
Design: meta-analysis Participants: 74,046 Evidence: high
Full summary, score breakdown and related studies → Original source
The objective of this meta-analysis was to determine the association of the apolipoprotein E ( ApoE ) gene with exceptional longevity (EL) ( i.e ., reaching 100+ years) by identifying possible unequal distribution of alleles/genotypes in the common variants ε2, ε3, and ε4 among centenarians and younger population. 4 key findings →
Design: meta-analysis Participants: 2,776 Evidence: high
Full summary, score breakdown and related studies → Original source
APOE ɛ4, the most significant genetic risk factor for Alzheimer disease (AD), may mask effects of other loci. 5 key findings →
Design: meta-analysis Participants: 4,203 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Compared with placebo, the use of G. biloba, 120 mg twice daily, did not result in less cognitive decline in older adults with normal cognition or with mild cognitive impairment. 3 key findings →
Participants: 1,545 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
The APOE ε4 carriers and noncarriers were not significantly different at baseline (except for serum cholesterol level). 5 key findings →
Participants: 1,260 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
The Enhancing NeuroImaging Genetics through Meta-Analysis (ENIGMA) Consortium is a collaborative network of researchers working together on a range of large-scale studies that integrate data from 70 institutions worldwide. 2 key findings →
Design: meta-analysis Participants: 12,826 Evidence: high
Full summary, score breakdown and related studies → Original source
Identifying genetic variants influencing human brain structures may reveal new biological mechanisms underlying cognition and neuropsychiatric illness. 2 key findings →
Design: meta-analysis Participants: 21,151 Evidence: high
Full summary, score breakdown and related studies → Original source
These results provide new insight into the genetic basis of habitual PA, and the genetic links connecting PA with other traits and diseases. 5 key findings →
Design: meta-analysis Participants: 8,556 Evidence: high
Full summary, score breakdown and related studies → Original source
In the replication stage, we performed genotyping of significant and suggestive results from the discovery stage. 2 key findings →
Design: meta-analysis Participants: 1,743 Evidence: high
Full summary, score breakdown and related studies → Original source
BackgroundDonanemab, a monoclonal antibody targeting amyloid-β (Aβ) plaques, has shown the ability to reduce cerebral amyloid burden in early Alzheimer's disease (AD). 2 key findings →
Design: systematic review Participants: 2,054 Evidence: high
Full summary, score breakdown and related studies → Original source
Narcolepsy type 1 is strongly associated with human leukocyte antigen (HLA)-DQB1*06:02; however, no significant associations between IH and HLA alleles have been reported. 4 key findings →
Design: meta-analysis Participants: 414 Evidence: high
Full summary, score breakdown and related studies → Original source
The aims of this study were to identify candidate single nucleotide polymorphisms (SNPs) and mechanisms of Alzheimer's disease (AD) and to generate SNP to gene to pathway hypotheses. 5 key findings →
Design: meta-analysis Participants: 370,542 Evidence: high
Full summary, score breakdown and related studies → Original source
GWAS of Alzheimer's disease have been predominantly based on European ancestry cohorts with clinically diagnosed patients. 2 key findings →
Design: meta-analysis Evidence: high
Full summary, score breakdown and related studies → Original source
Identifying ancestry-specific molecular profiles of late-onset Alzheimer's Disease (LOAD) in brain tissue is crucial to understand novel mechanisms and develop effective interventions in non-European, high-risk populations. 3 key findings →
Design: meta-analysis Participants: 731 Evidence: high
Full summary, score breakdown and related studies → Original source
The need for large sample sizes has led to collaborative efforts, such as the Prospective Studies Collaboration (an individual participant meta-analysis of data from 61 studies and more than a million participants11) that has demonstrated conclusively that a continuous increase in blood pressure corresponds with an increased risk of vascular death across all age groups (see Figure 1 that illustrates the importance of a large sample size (about 500 000 participants) for detecting this association).12 Sample size is also of particular importance in the current era of genome-wide association studies, where many investigations are aiming to detect either small effects from common variants or large effects from rare variants.13 Absolute risk of ischaemic heart disease mortality by usual systolic blood pressure and age at risk in 5000, 50 000, and 500 000 participants. 5 key findings →
Design: meta-analysis Participants: 5,200 Evidence: high
Full summary, score breakdown and related studies → Original source
Two loci were identified to have genome-wide significance for the first time: rs744373 near BIN1 (odds ratio [OR],1.13; 95% confidence interval [CI],1.06-1.21 per copy of the minor allele; P = 1.59x10(-11)) and rs597668 near EXOC3L2/BLOC1S3/MARK4 (OR, 1.18; 95% CI, 1.07-1.29; P = 6.45x10(-9)). 3 key findings →
Participants: 35,000 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Genome-wide significance in fully adjusted models (sex, age, APOE genotype, population stratification) was observed for a SNP in ABCA7 (rs115550680, allele = G; frequency, 0.09 cases and 0.06 controls; odds ratio [OR], 1.79 [95% CI, 1.47-2.12]; P = 2.2 × 10(-9)), which is in linkage disequilibrium with SNPs previously associated with Alzheimer disease in Europeans (0.8 Conclusions and relevance In this meta-analysis of data from African American participants, Alzheimer disease was significantly associated with variants in ABCA7 and with other genes that have been associated with Alzheimer disease in individuals of European ancestry. 4 key findings →
Design: meta-analysis Participants: 5,896 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
In addition, several loci associated with rare variants, including a genome-wide significant intergenic locus near IGF1R at 15q26 (P = 1.7 × 10-9) and 6 additional loci with suggestive significance (P ≤ 5 × 10-7) such as API5 at 11p12 (P = 8.8 × 10-8) and RBFOX1 at 16p13 (P = 5.4 × 10-7) were identified. 4 key findings →
Design: meta-analysis Participants: 2,784 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Among older adults without cognitive impairment or dementia, both an unfavorable lifestyle and high genetic risk were significantly associated with higher dementia risk. 5 key findings →
Design: cohort study Participants: 383 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Frontotemporal dementia (FTD) is a complex disorder characterised by a broad range of clinical manifestations, differential pathological signatures, and genetic variability. 4 key findings →
Design: meta-analysis Participants: 3,526 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
The hippocampal formation is a brain structure integrally involved in episodic memory, spatial navigation, cognition and stress responsiveness. 3 key findings →
Participants: 33,536 Evidence: low
Full summary, score breakdown and related studies → Original source
Where “Free full text” comes from
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
How the 0–100 score works — and why some entries are capped
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.
- Journal tier up to 10 pts
- Journal's citation record up to 4 pts
- Study design up to 12 pts
- Strength of evidence up to 5 pts
- Peer-review validation up to 10 pts
- How recent up to 5 pts
- Sample size up to 4 pts
- Effect reported up to 3 pts
- Studied in people up to 3 pts
- Randomised / blinded up to 2 pts
- Times cited up to 7 pts
- Citations per year up to 5 pts
- Impact for its field and year up to 6 pts
- Cited by studies here up to 6 pts
- Still being cited up to 4 pts
- Senior author's track record up to 4 pts
- Institution's track record up to 3 pts
- Multi-centre collaboration up to 3 pts
- Indexed in PubMed up to 2 pts
- Free to read up to 2 pts
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.
What this library is — and isn't
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 →