27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Supported by very low-to-moderate certainty of evidence, physical activity/exercise has a positive effect on several cognitive and noncognitive outcomes in people with MCI and dementia, but RCTs, with low risk of bias/confounding, are still needed to confirm these relationships. 2 key findings →
Design: meta-analysis Participants: 28,205 Evidence: high
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In this population, among those who progressed to dementia, 60% progressed to AD and 33% to VaD. 2 key findings →
Design: longitudinal study Participants: 2,963 Evidence: moderate
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Adult vaccinations, particularly against herpes zoster, influenza, pneumococcus and Tdap, are associated with a lower risk of dementia. 5 key findings →
Design: meta-analysis Participants: 104,031,186 Evidence: moderate
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Across the whole-sample, the single-modality models indicated significant correlations between the rate of cognitive decline and the first component of each imaging modality. 4 key findings →
Design: longitudinal study Participants: 12 Evidence: moderate
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Twelve articles-published between the 2007 and 2017-have been included in this systematic review after a quantitative and qualitative selection. 4 key findings →
Design: systematic review Evidence: high
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These results from the largest longitudinal cohort registry of patients with CAA-ri support the transient and potentially relapsing inflammatory nature of the clinical-radiologic acute manifestations of the disease and the effectiveness of slow oral tapering off after IV corticosteroid pulse therapy in preventing recurrences. 3 key findings →
Design: longitudinal study Participants: 113 Evidence: moderate
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Our data from a population-based study support the hypothesis that estrogen-replacement therapy is associated with a reduced prevalence of Alzheimer's disease in postmenopausal women. 4 key findings →
Evidence: low
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Slow gait speed has been shown to predict incident dementia and cognitive decline in older individuals. 1 key finding →
Design: longitudinal study Participants: 57,456 Evidence: moderate
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Age-related cognitive impairment and dementia are an increasing societal burden. 4 key findings →
Evidence: low
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The MD is a scientifically supported dietary intervention with broad preventive and therapeutic benefits. 2 key findings →
Design: systematic review Participants: 84 Evidence: high
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Out of 929 patients, 184 (20%) experienced POD. 5 key findings →
Design: cohort study Participants: 929 Evidence: moderate
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Brain regions with higher synaptic density are associated with a higher 18F-AV-1451 binding in progressive supranuclear palsy/corticobasal degeneration, but this association diminishes with disease severity. 1 key finding →
Design: cross-sectional Participants: 12 Evidence: moderate
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CIND is very frequent in older people. 4 key findings →
Design: cross-sectional Participants: 3,425 Evidence: moderate
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Incidence of dementia in Italy paralleled that in most industrialized countries. 4 key findings →
Design: longitudinal study Participants: 3,208 Evidence: moderate
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Environmental enrichment may slow cognitive decay possibly acting through an improvement in vascular function. 2 key findings →
Participants: 55 Evidence: high
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Incidence of parkinsonism and PD increased with age, PD was the most common type of parkinsonism, and men had a risk of developing PD twice that of women. 2 key findings →
Participants: 4,341 Evidence: moderate
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Clinical data alone poorly predicted phenoconversion in RBD due to synucleinopathy patients. 3 key findings →
Participants: 173 Evidence: low
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Multiple linear regression models identified sources of signal covariance between neuroinflammation and brain connectivity profiles, in relation to the diagnostic group (patients, controls) and cognitive status. 3 key findings →
Participants: 28 Evidence: low
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Both cognitive impairment, no dementia and mild cognitive impairment are frequent in the Italian elderly (2,955,000 prevalent cases expected) and significantly predict progression to dementia. 3 key findings →
Design: longitudinal study Evidence: moderate
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This study examines whether neuroticism is differentially associated with risk of incident Alzheimer's disease (AD), vascular dementia (VD), and frontotemporal dementia (FTD) using a prospective study design. 4 key findings →
Participants: 401,422 Evidence: low
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Triggering receptor expressed on myeloid cells 2 (Trem2) is a myeloid cell-specific gene expressed in brain microglia, with variants that are associated with neurodegenerative diseases, including Alzheimer's disease. 4 key findings →
Evidence: low
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The complexity of neurodegenerative disorders necessitates an integrative approach that incorporates morphological, functional, and molecular biomarkers. 3 key findings →
Participants: 279 Evidence: moderate
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Geroscience, the new interdisciplinary field that aims to understand the relationship between aging and chronic age-related diseases (ARDs) and geriatric syndromes (GSs), is based on epidemiological evidence and experimental data that aging is the major risk factor for such pathologies and assumes that aging and ARDs/GSs share a common set of basic biological mechanisms. 2 key findings →
Evidence: low
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Cognitive impairment is an increasingly recognized major cause of chronic disability and is commonly found in patients with chronic kidney disease (CKD). 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Simultaneously evaluating resting-state brain glucose metabolism and intrinsic functional activity has potential to impact the clinical neurosciences of Alzheimer Disease (AD). 3 key findings →
Participants: 23 Evidence: low
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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 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.
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 →