Of 102 607 individuals in the study, 56 559 (55%) were women (median age, 58 years [IQR, 47-67 years]). 5 key findings →
Participants: 607 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Of 102 607 individuals in the study, 56 559 (55%) were women (median age, 58 years [IQR, 47-67 years]). 5 key findings →
Participants: 607 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder affecting primarily the motor system, but in which extra-motor manifestations are increasingly recognized. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Mitochondrial DNA instability disorders are responsible for a large clinical spectrum, among which amyotrophic lateral sclerosis-like symptoms and frontotemporal dementia are extremely rare. 2 key findings →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Exposure to particulate matter (PM) in the ambient air and its interactions with APOE alleles may contribute to the acceleration of brain aging and the pathogenesis of Alzheimer's disease (AD). 1 key finding →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Almost all individuals with Down Syndrome (DS) develop Alzheimer's disease (AD) by mid to late life. 3 key findings →
Participants: 229 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A comprehensive, unbiased inventory of synuclein forms present in Lewy bodies from patients with dementia with Lewy bodies was carried out using two-dimensional immunoblot analysis, novel sandwich enzyme-linked immunosorbent assays with modification-specific synuclein antibodies, and mass spectroscopy. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The RNA-binding protein TDP-43 regulates RNA metabolism at multiple levels, including transcription, RNA splicing, and mRNA stability. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The mechanisms by which mutations in the presenilins (PSEN) or the amyloid precursor protein (APP) genes cause familial Alzheimer disease (FAD) are controversial. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The R47H variant in the triggering receptor expressed on myeloid cells 2 gene (TREM2), a modulator of the immune response of microglia, is a strong genetic risk factor for Alzheimer disease (AD) and possibly other neurodegenerative disorders. 4 key findings →
Participants: 751 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Autosomal-dominant Alzheimer disease (ADAD) is a genetic disorder caused by mutations in Amyloid Precursor Protein (APP) or Presenilin (PSEN) genes. 4 key findings →
Participants: 18 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Genetic variants of TREM2, a protein expressed selectively by microglia in the brain, are associated with Alzheimer's disease (AD). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease, obesity-related metabolic syndrome, and cancer are the leading causes of death and among the most costly medical conditions in the Western world. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Neuroinflammation is an important contributor to Alzheimer's disease (AD) pathogenesis, as underscored by the recent identification of immune-related genetic risk factors for AD, including coding variants in the gene TREM2 (triggering receptor expressed on myeloid cells 2). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Loss-of-function variants of TREM2 are associated with increased risk of Alzheimer's disease (AD), suggesting that activation of this innate immune receptor may be a useful therapeutic strategy. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Natural killer (NK) cells are commonly reduced in human tumors, enabling many to evade surveillance. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
TREM2 is a lipid-sensing activating receptor on microglia known to be important for Alzheimer's disease (AD), but whether it plays a beneficial or detrimental role in disease pathogenesis is controversial. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease (AD) is characterized by plaques containing amyloid-β (Aβ) and neurofibrillary tangles composed of aggregated, hyperphosphorylated tau. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
In Alzheimer's disease (AD) models, AD risk variants in the microglial-expressed TREM2 gene decrease Aβ plaque-associated microgliosis and increase neuritic dystrophy as well as plaque-associated seeding and spreading of tau aggregates. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
White matter alterations are present in the majority of patients with Alzheimer's disease type dementia. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Triggering receptor expressed on myeloid cell 2 (TREM2) is linked to risk of neurodegenerative disease. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Variants in the triggering receptor expressed on myeloid cells 2 (TREM2) gene are associated with increased risk for late-onset AD. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Neuronal hyperactivity is a key feature of early stages of Alzheimer's disease (AD). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Some of the unexplained heritability of Alzheimer disease (AD) may be due to rare variants whose effects are not captured in genome-wide association studies because very large samples are needed to observe statistically significant associations. 4 key findings →
Participants: 5,617 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Social isolation and loneliness have been associated with increased risk of dementia, but it is not known whether this risk is modified or confounded by genetic risk of dementia. 4 key findings →
Participants: 70 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease, a fatal neurodegenerative disorder of unknown aetiology, is usually considered to be a single disorder because of the general uniformity of the disease phenotype. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
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 →