Lower SES and education were the strongest predictors of increased behavioral risk. 5 key findings →
Design: cross-sectional Participants: 1,730 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Research
27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Isolated rapid eye movement sleep behavior disorder (iRBD) is a major prodromal marker of α-synucleinopathies, often preceding the clinical onset of Parkinson's disease, dementia with Lewy bodies, or multiple system atrophy. 3 key findings →
Participants: 31 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Tau accumulates in a group of neurodegenerative diseases known as tauopathies. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
50/100
The Dominantly Inherited Alzheimer Network Observational Study (DIAN Obs) is a longitudinal, global cohort study investigating brain aging and autosomal dominant Alzheimer’s disease (ADAD), a rare monogenic form of Alzheimer’s disease (AD). 5 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Vestibular disorders were linked to higher risks of all‐cause dementia (HR 1.86 and 95% CI 1.04–3.30), Alzheimer's disease (AD, 2.36, and 1.01–5.51), and vascular dementia (VD, 3.35, and 1.48–7.59). 5 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
= 0.02). Lifetime exposure to cognitive enrichment was related to lower risk of AD dementia and a slower rate of cognitive decline, including after adjustment for common ADRD pathologies, indicating higher resilience provided by lifetime enrichment. 2 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Primary age-related tauopathy (PART) is a β-amyloid-independent tauopathy, thought by some to be a distinct process from Alzheimer disease neuropathologic change (ADNC). 3 key findings →
Design: longitudinal study Participants: 174 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Among 547 310 older adults undergoing surgery, 43 041 (7·9%) had preoperative dementia. 5 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Type 2 diabetes mellitus (T2DM) and major depressive disorder (MDD) are reciprocal risk factors, and both elevate dementia risk. 4 key findings →
Participants: 15,765 Evidence: low
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
Secondary outcomes included plan- and county-level factors associated with offering this benefit in 2025, estimated using multivariable mixed-effects logistic regression with county-level random intercepts. 2 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source
A total of 12 studies were included, with overall moderate risk of bias, mainly due to inadequate randomization and blinding. 3 key findings →
Design: systematic review Participants: 12 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
The existence of human hippocampal neurogenesis has long been disputed1-12 and its relevance in cognition remains unknown. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
Alzheimer's disease (AD) is not an inevitable outcome of pathology but a dynamic process shaped by how brain cells respond to amyloid-β (Aβ) and tau. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
50/100
Sleep apnea is associated with an increased risk of Parkinson disease. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source
The costs of dementia fall on families, highlighting limited policy and work supports. 2 key findings →
Design: modelling Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
BackgroundSeveral monoclonal antibodies designed to slow cognitive and functional decline in individuals with early Alzheimer's disease (AD) have been recently approved. 5 key findings →
Design: systematic-review Evidence: moderate
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Tau pathology spreads cell to cell, but the mechanisms of intercellular tau transmission remain unclear. 1 key finding →
Evidence: early
Full summary, score breakdown and related studies → Original source Free full text
Non-elevated plasma p-tau181 results impacted the diagnosis and use of amyloid PET imaging in a memory clinic. 5 key findings →
Design: cohort Participants: 100 Evidence: early
Full summary, score breakdown and related studies → Original source Free full text
The study aim is to investigate whether blood biomarkers (BBMs) of Alzheimer's disease (AD) pathology are associated with postoperative cognitive dysfunction (POCD) after cardiac surgery. 4 key findings →
Participants: 394 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Postoperative Cognitive Dysfunction (POCD) is a common complication in older adults undergoing major surgery and is associated with prolonged recovery and long-term cognitive decline. 4 key findings →
Design: systematic review Participants: 705 Evidence: high
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Impaired lung function (ILF) has been associated with cognitive decline and dementia risk in multiple cohorts, yet the role of circulating Alzheimer disease (AD) biomarkers in this relationship is not well understood. 4 key findings →
Participants: 4,072 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Astrocytic injury and endothelial activation are interconnected processes within the neurovascular system that may contribute to variability in cognitive performance among cognitively unimpaired adults. 3 key findings →
Design: cross-sectional Participants: 313 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Overall, 233,567 long-term home care recipients with known carer status were studied. 5 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
49/100
= 0.64). In AD-relevant regions, increased free water correlates with tau load independently of macrostructural metrics or amyloid load. 2 key findings →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
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 →