Among older adults, anemia is associated with an increased risk of developing dementia. 5 key findings →
Participants: 2,552 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Research
28,180 Alzheimer's and dementia studies in plain English, each scored out of 100.
In this large multicentre and long-term population-based study, some well-known risk factors for dementia, of vascular and Alzheimer's type, are confirmed but not others. 3 key findings →
Design: cohort study Participants: 4,075 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Of 9,033 ARIC participants with sufficient Medicare coverage data (4,980 [55.1%] female, 1993 [22.1%] Black), 671 met the definition of LOE. 2 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Brazil's potential for dementia prevention is higher than in HIC. 1 key finding →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
However, in many low- and middle-income countries (LMIC) there is a lack of evaluation and the cross-cultural validity of SRH remains largely untested. 5 key findings →
Design: cohort study Participants: 16,940 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
The relation of blood pressure with cognitive function and dementia has, in recent years, received much attention from epidemiological research. 2 key findings →
Design: cross-sectional Evidence: high
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Plasma levels of inflammatory proteins are increased before clinical onset of dementia, Alzheimer disease, and vascular dementia. 3 key findings →
Design: cohort study Participants: 6,713 Evidence: moderate
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Cognitive function was inversely related to all measures of disease pathology, indicating lower function at more severe levels of pathology. 2 key findings →
Design: longitudinal study Evidence: moderate
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During a mean follow-up of 3.6 years, 138 persons developed AD. 5 key findings →
Design: cohort study Participants: 138 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Prior work has suggested that obesity and overweight as measured by body mass index (BMI) increases risk of dementia. 4 key findings →
Participants: 10,136 Evidence: moderate
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The structure and integrity of the ageing brain is interchangeably linked to physical health, and cardiometabolic risk factors (CMRs) are associated with dementia and other brain disorders. 4 key findings →
Design: cross-sectional Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Diabetes and even prediabetes are associated with accelerated brain aging, especially among men and people with poor cardiometabolic health. 4 key findings →
Participants: 31,229 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The possibility that history of depression is a risk factor for dementia needs to be taken seriously and explanations of the association need to be further researched. 2 key findings →
Design: meta-analysis Evidence: high
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The relationships between total serum cholesterol (TC) and dementia and between TC and cognitive decline were investigated in a systematic review of 18 prospective studies. 5 key findings →
Design: systematic review Participants: 14,331 Evidence: high
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These results help explain the "obesity paradox" as differences in dementia risk across time are consistent with physical changes in the trajectory toward disability. 4 key findings →
Participants: 2,798 Evidence: low
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The average follow-up was 6.0 years. 4 key findings →
Participants: 5,395 Evidence: low
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At baseline, participants (n = 168) were cognitively normal and primarily middle-aged (mean 56.4 years, SD 10.9 years) and had both vascular risk factor status and proximal CSF biomarkers available. 4 key findings →
Design: cohort study Participants: 168 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Although memory complaints are associated with an increased risk of Alzheimer's disease in persons with cognitive impairment as well as in persons with normal cognition, they are commonly considered of less importance than objective cognitive measures. 4 key findings →
Design: cohort study Participants: 7,983 Evidence: moderate
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61/100
Women's reproductive factors have been associated with the risk of dementia; however, these findings remain uncertain. 4 key findings →
Participants: 273,240 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Plasma proteins affect biological processes and are common drug targets but their role in the development of Alzheimer's disease and related dementias remains unclear. 4 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Recent studies have associated immune abnormalities with dementia. 4 key findings →
Design: longitudinal study Participants: 50,864 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Whether the association of cardiovascular diseases (CVDs) with dementia differs by sex remains unclear, and the role of socioeconomic, lifestyle, genetic, and medical factors in their association is unknown. 4 key findings →
Design: cohort study Participants: 502,649 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A total of 3,162 cases of dementia occurred during the follow-up. 5 key findings →
Design: cohort study Participants: 49,511 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Age- and education-adjusted hazard ratios (HRs) for ADRD increased as neighborhood disadvantage increased, to 1.42 (95% confidence interval [CI] 1.06-1.91) in the most disadvantaged quintile compared to the least disadvantaged quintile, with a significant linear trend (p = 0.012). 5 key findings →
Design: longitudinal study Participants: 10,915 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
This meta-analysis included 21 studies involving 35,449 participants. 5 key findings →
Design: meta-analysis Participants: 21 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
From across this tag
10 of the 1,141 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 10. The same 10 appear here every time.
- Environmental factors and risks of cognitive impairment and dementia: A systematic review and meta-analysis
- Association between multimorbidity status and incident dementia: a prospective cohort study of 245,483 participants
- Association of weight change with cerebrospinal fluid biomarkers and amyloid positron emission tomography in preclinical Alzheimer's disease
- Central auditory dysfunction as a harbinger of Alzheimer dementia
- Associations Between Midlife Vascular Risk Factors and 25-Year Incident Dementia in the Atherosclerosis Risk in Communities (ARIC) Cohort
- Serum brain-derived neurotrophic factor and the risk for dementia: the Framingham Heart Study
- Elevated dementia risk, cognitive decline, and hippocampal atrophy in multisite chronic pain
- Genetic Risk for Alzheimer Disease, Midlife Hypertension, and Dementia: The ARIC Neurocognitive Study
- Associations between single and multiple cardiometabolic diseases and cognitive abilities in 474 129 UK Biobank participants
- Dementia and cognitive decline in type 2 diabetes and prediabetic stages: towards targeted interventions
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 28,180 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 28,180 records, built mostly from automated pulls of Europe PMC (61.7% of the library) and OpenAlex (18.1%), 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 (3.7% 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 →