28,580 Alzheimer's and dementia studies in plain English, each scored out of 100.
US clinical practice guidelines for the diagnostic evaluation of cognitive impairment due to Alzheimer's disease (AD) or AD and related dementias (ADRD) are decades old and aimed at specialists. 5 key findings →
Design: systematic-review Evidence: high
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Studies were significantly heterogeneous in terms of country, outcomes assessed, and the timing of post-ED outcome assessments. 5 key findings →
Design: systematic review Participants: 7,940 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
A large proportion of the Medicare PD population resides in an LTCF. 2 key findings →
Design: cohort study Participants: 38,334 Evidence: moderate
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Among 2556 patients (mean age 79 ± 9 years; 56% women), delirium occurred in 957 (37%). 5 key findings →
Design: cohort study Participants: 2,556 Evidence: moderate
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Beneficiaries with dementia who had lower levels of continuity of care were younger, had a higher income, and had more comorbid medical conditions. 3 key findings →
Design: retrospective cohort Evidence: moderate
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Prevalence of dementia was 8.3%. 2 key findings →
Design: cross-sectional Participants: 1,238,895 Evidence: low
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Overall, 1.45% of the study cohort age ≥65 received HBMC. 5 key findings →
Design: longitudinal study Participants: 132,147 Evidence: moderate
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Of the 18,341 patients, we found that 2202 (12%) were described as "frail" in clinical notes. 5 key findings →
Design: cohort study Participants: 18,341 Evidence: moderate
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Despite using more home health and hospital services than controls in the baseline preenrollment period, which suggests that they were sicker, participants receiving house calls had 17% lower overall Medicare costs than controls, and there was no indication of poorer quality of care, greater mortality, or underservice. 4 key findings →
Design: prospective cohort Participants: 9,425 Evidence: high
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During follow-up, 203 cases of hospitalisation with dementia were identified. 5 key findings →
Participants: 151 Evidence: moderate
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Use of potentially inappropriate medications in Australian nursing home residents with advanced dementia is common. 3 key findings →
Design: randomized controlled trial Participants: 65 Evidence: high
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Of 65 participants (mean age = 79.4 years; women = 54%), 34% had dementia and 32% had CIND. 5 key findings →
Design: cross-sectional Participants: 65 Evidence: low
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Dementia prevalence was 22%, with 35% undiagnosed. 4 key findings →
Design: prospective cohort Participants: 2,003 Evidence: moderate
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Overall, 5% of the study population (n=161,801) received 2+ months of HCC visits; of these, 46% also received 2+ HBMC visits (n=73,638) while 54% received only skilled home health (n=88,163 HCC but no HBMC). 4 key findings →
Participants: 161,801 Evidence: low
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With a psychiatrist's standardized clinical diagnosis as the criterion, the 'Mini-Mental State' Examination (MMSE) was 87% sensitive and 82% specific in detecting dementia and delirium among hospital patients on a general medical ward. 1 key finding →
Evidence: low
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By 12 months after discharge, of those discharged with new or additional ADL disability, 41.3% died, 28.6% were alive but had not recovered to baseline function, and 30.1% were at baseline function. 2 key findings →
Evidence: low
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In 2022, the overall prevalence of homebound beneficiaries was 22.0% (8.4% of beneficiaries were homebound, and 13.6% were semihomebound). 5 key findings →
Design: cross-sectional Evidence: low
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Receipt of potentially burdensome hospitalizations and treatments; receipt of postdischarge home and facility care. 5 key findings →
Participants: 659 Evidence: low
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In a sample of 2,599 Medicare beneficiaries (mean age 78.4 years, 52.9% female, 81.8% White), we identified a total of 5,677 hospitalization claims. 5 key findings →
Participants: 5,677 Evidence: low
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This study estimated the prevalence of dementia in 2,285 new admissions age 65+ to a statewide sample of 59 nursing homes in Maryland, 1992-1995. 3 key findings →
Evidence: low
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Describe geographic variation from 2019 to 2023 in assisted living (AL) and memory care supply, and its correlation with county-level characteristics. 2 key findings →
Participants: 1,000 Evidence: low
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Among 1,372,570 HH patients, 30% had diagnosed dementia. 5 key findings →
Evidence: low
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The high prevalence of mental disorders such as depression and dementia in institutionalized elderly patients warrants screening for psychiatric diagnosis in patients newly admitted to long-term care facilities. 4 key findings →
Evidence: low
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These findings suggest that moving to an AL influences Medicare enrollment decisions; and, variation in switching exists between the type of AL (general vs memory care) and whether or not an individual has dementia. 4 key findings →
Participants: 63,395 Evidence: low
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These findings suggest that moving to an AL influences Medicare enrollment decisions; and, variation in switching exists between the type of AL (general vs memory care) and whether or not an individual has dementia. 4 key findings →
Participants: 63,395 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 →