The likelihood of amyloid positivity was associated with age and APOE ε4 status. 3 key findings →
Design: meta-analysis Participants: 377 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
28,580 Alzheimer's and dementia studies in plain English, each scored out of 100.
The likelihood of amyloid positivity was associated with age and APOE ε4 status. 3 key findings →
Design: meta-analysis Participants: 377 Evidence: high
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
With no effective treatments for cognitive decline or dementia, improving the evidence base for modifiable risk factors is a research priority. 1 key finding →
Design: meta-analysis Participants: 48,522 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
We found a sequence to pathological changes, with rates of Aβ deposition in mutation carriers being significantly different from those in non-carriers first (across regions that showed a significant difference, at a mean of 18·9 years [SD 3·3] before expected onset), followed by hypometabolism (14·1 years [5·1] before expected onset), and lastly structural decline (4·7 years [4·2] before expected onset). 2 key findings →
Design: longitudinal study Participants: 346 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Ann Neurol 2018;84:737-748. 1 key finding →
Design: meta-analysis Participants: 443 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Frontotemporal lobar degeneration with neuronal inclusions of the TAR DNA-binding protein 43 (FTLD-TDP) is a fatal neurodegenerative disorder with only a limited number of risk loci identified. 3 key findings →
Design: meta-analysis Participants: 985 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Periventricular white matter hyperintensities (WMH; PVWMH) and deep WMH (DWMH) are regional classifications of WMH and reflect proposed differences in cause. 4 key findings →
Design: meta-analysis Participants: 26,654 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
White matter hyperintensities (WMH) are the most common brain-imaging feature of cerebral small vessel disease (SVD), hypertension being the main known risk factor. 1 key finding →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Data from 3960 MRI sessions among 1141 participants were included: 252 pathogenic variant carriers from DIAN (mean [SD] age, 38.4 [11.2] years; 137 [54%] female), 571 older adults from ADNI (mean [SD] age, 72.8 [7.3] years; 274 [48%] female), and 318 older adults from HABS (mean [SD] age, 72.4 [7.6] years; 194 [61%] female). 3 key findings →
Design: cohort study Participants: 1,141 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Frontotemporal lobar degeneration (FTLD) is the second most common cause of presenile dementia. 1 key finding →
Participants: 515 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The genetic basis of Lewy body dementia (LBD) is not well understood. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Disease-modifying therapies for Alzheimer's disease (AD) are likely to be most beneficial when initiated in the presymptomatic phase. 2 key findings →
Design: cross-sectional Participants: 567 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A summary measure of γ-secretase activity (γ-secretase composite [GSC]) was calculated for each variant and compared with clinical history-derived AAO using correlation analyses. 3 key findings →
Design: cross-sectional Participants: 190 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Due to trisomy of chromosome 21 and the resultant extra copy of the amyloid precursor protein gene, nearly all adults with Down syndrome develop Alzheimer's disease pathology by the age of 40 years and are at high risk for dementia given their increased life expectancy compared with adults with Down syndrome in the past. 1 key finding →
Design: cross-sectional Participants: 41 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Resting-state functional connectivity magnetic resonance imaging changes with progressing AD severity are similar between ADAD and LOAD. 2 key findings →
Design: cross-sectional Participants: 79 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Molecular genetic studies of familial cases of FTLD-U have shown that mutations in the progranulin (PGRN) gene are a major genetic cause of FTLD-U. Thus, familial TDP-43 proteinopathy is associated with defects in multiple genes, and molecular genetics is required in these cases to correctly identify the causative gene defect. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Atrophy in FAD is observed early, both in areas commonly associated with sporadic Alzheimer disease and also in the putamen and thalamus, 2 regions associated with early amyloid deposition in FAD mutation carriers. 4 key findings →
Design: cross-sectional Participants: 192 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
We present a comprehensive global analysis of genetic variants associated with autosomal-dominant Alzheimer's disease (ADAD). 2 key findings →
Participants: 550 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The extent to which the pathophysiology of autosomal dominant Alzheimer's disease corresponds to the pathophysiology of 'sporadic' late onset Alzheimer's disease is unknown, thus limiting the extrapolation of study findings and clinical trial results in autosomal dominant Alzheimer's disease to late onset Alzheimer's disease. 3 key findings →
Participants: 559 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Two decades after the discovery that 20% of familial amyotrophic lateral sclerosis (ALS) cases were linked to mutations in the superoxide dismutase-1 (SOD1) gene, a substantial proportion of the remainder of cases of familial ALS have now been traced to an expansion of the intronic hexanucleotide repeat sequence in C9orf72. 1 key finding →
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
Population health research is increasingly focused on the genetic determinants of healthy ageing, but there is no public resource of whole genome sequences and phenotype data from healthy elderly individuals. 4 key findings →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Proteomic studies for Alzheimer's disease (AD) are instrumental in identifying AD pathways but often focus on single tissues and sporadic AD cases. 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Although pathogenic variants in PSEN1 leading to autosomal-dominant Alzheimer disease (ADAD) are highly penetrant, substantial interindividual variability in the rates of cognitive decline and biomarker change are observed in ADAD. 3 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
FUS gene mutations were recently identified in familial amyotrophic lateral sclerosis (ALS). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
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 28,580 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 28,580 records, built mostly from automated pulls of Europe PMC (62.2% of the library) and OpenAlex (17.8%), 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.
1,034 records (3.6% 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 →