28,580 Alzheimer's and dementia studies in plain English, each scored out of 100.
Dementia diagnosis recording in general hospitals is increasing but remains less likely in some groups. 1 key finding →
Design: cohort study Participants: 21,387 Evidence: moderate
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The prevalence of MCI in China was 15.4%, which varied by demographics, lifestyles, morbidity, screening tools, and diagnostic criteria. 2 key findings →
Design: systematic review Participants: 123,766 Evidence: high
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When diagnosed, non-Hispanic Blacks and Hispanics may have more advanced dementia. 1 key finding →
Design: cohort study Participants: 3,966 Evidence: moderate
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People from the black ethnic group had a higher incidence of dementia diagnosis and those from the Asian ethnic group had lower incidence compared with the white ethnic group. 5 key findings →
Design: cohort study Participants: 2,511,681 Evidence: moderate
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Most studies have focused on dementia and suicidal behavior, with inconsistent results. 5 key findings →
Design: cohort study Participants: 21 Evidence: moderate
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54% of Medicare decedents were female, 85% non-Hispanic White, 8% non-Hispanic Black, and 4% Hispanic. 5 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source
The use of videoconference technology to deliver health care diagnostics and treatment continues to grow at a rapid pace. 2 key findings →
Evidence: low
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Previous studies have suggested that education and race may affect performance on standardized mental status tests. 3 key findings →
Design: longitudinal study Participants: 100 Evidence: moderate
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When assessed by simple questions, SMC appear to be present in the minority of those with mild cognitive impairment and dementia. 3 key findings →
Design: meta-analysis Evidence: high
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International hospital-based studies have indicated a high risk of cognitive impairment after stroke, evidence from community-based studies in China is scarce. 2 key findings →
Design: cross-sectional Participants: 599 Evidence: low
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In this study, we report the experience of the only reference clinical next-generation sequencing lab in Saudi Arabia with the first 1000 families who span a wide-range of suspected Mendelian phenotypes. 1 key finding →
Participants: 1,019 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Our findings suggest cutoffs may need to be stratified by race/ethnicity and education to ensure detecting MCI from normal and MCI from dementia. 2 key findings →
Participants: 3,895 Evidence: low
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In this population, the prevalence of AD and other dementias was low, increased with age, and was not associated with gender or literacy. 5 key findings →
Participants: 5,126 Evidence: moderate
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Survival after dementia diagnosis differs by race/ethnicity, with shortest survival among whites and longest among Asian Americans. 3 key findings →
Participants: 23,032 Evidence: low
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Two of every three persons living with dementia reside in low- and middle-income countries (LMICs). 5 key findings →
Evidence: low
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Numerous tools for assessment of cognitive impairment in low-literacy settings have been developed, and tools developed for use in high-income countries have also been validated in low-literacy settings. 2 key findings →
Design: meta-analysis Evidence: high
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A co-morbidity score was significantly higher in AD participants compared to controls. 3 key findings →
Participants: 187 Evidence: low
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It could be of great improvement for the use of the MMSE in dementia screening in Chinese elderly population. 1 key finding →
Design: cross-sectional Participants: 9,629 Evidence: low
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Incidence rates of all dementias and of AD increased with age; men and those with lesser education had higher rates of possible/incipient dementia (CDR = 0.5) in this community. 5 key findings →
Participants: 1,298 Evidence: moderate
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Previous research has shown that the Mini-Mental State Examination (MMS) is biased as a measure of cognitive impairment in minority and low-education patients. 3 key findings →
Participants: 590 Evidence: low
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A registry of the University of Washington Alzheimer's Disease Research Center Satellite. 1 key finding →
Design: cross-sectional Participants: 371 Evidence: low
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Given considerable variation in diagnostic and therapeutic practice, there is a need for national guidance on the use of neuroimaging, fluid biomarkers, cognitive testing, follow-up and diagnostic terminology in mild cognitive impairment (MCI). 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Prevalence of dementia subtypes in China is comparable with that in Western countries. 1 key finding →
Design: cross-sectional Participants: 99 Evidence: low
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Black race was associated with greater dementia risk even after adjustment for education and other potential confounders. 4 key findings →
Design: longitudinal study Evidence: moderate
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The Alzheimer's Association hosted the second Latinos & Alzheimer's Symposium in May 2021. 2 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. 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 →