28,180 Alzheimer's and dementia studies in plain English, each scored out of 100.
Purpose of the study There is a global imperative to increase awareness of the emerging evidence on physical activity (PA) among older adults. 1 key finding →
Evidence: low
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Alzheimer's disease (AD) is the primary cause of age-related dementia. 3 key findings →
Evidence: low
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Advances in our understanding of the role of cardiovascular risks have shown them to be closely associated with cognitive impairment and dementia. 2 key findings →
Evidence: low
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While all groups are affected by the COVID-19 pandemic, the elderly, underrepresented minorities, and those with underlying medical conditions are at the greatest risk. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Sensory abilities decline with age. More than 5% of the world's population, approximately 360 million people, have disabling hearing loss. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The long-term consequences of repetitive head impacts have been described since the early 20th century. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Cognitive impairment, including dementia, is a common but poorly recognized problem among patients with end-stage renal disease (ESRD), affecting 16-38% of patients. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease (AD) is generally understood as primarily affecting cognition while sparing motor function, at least until the later stages of the disease. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The current study examined the relationship between cognitive function and falls in older people who did not meet criteria for dementia or mild cognitive impairment (N = 172). 5 key findings →
Participants: 172 Evidence: low
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The unique biochemical profile of homocysteine is characterized by chemical reactivity supporting a wide range of molecular effects and by a tendency to promote oxidant stress-induced cellular toxicity. 2 key findings →
Evidence: high
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Falls remain common in older people, with higher prevalence and morbidity in those who are cognitively impaired. 1 key finding →
Evidence: low
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Physical activity improves overall health and reduces the risk of many negative health outcomes and may be effective in improving cognition, independent functioning, and psychological health in older adults. 1 key finding →
Evidence: low
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Cognitive impairment can be influenced by a number of factors. 5 key findings →
Design: cohort study Evidence: moderate
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Individuals with dementia were more likely to be diagnosed with 15 comorbidity complexes, including Parkinson's, stroke, diabetes, atherosclerosis (supposed dementia risk factors) or fluids and electrolyte disorders, insomnia, incontinence, pneumonia, fractures and injuries (supposed sequelae). 3 key findings →
Participants: 9,139 Evidence: low
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These effects were most pronounced in caregivers of subjects with Alzheimer's disease. 1 key finding →
Design: cross-sectional Evidence: low
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Data from four studies were used to assess the psychometric properties of the 26 IQCODE items. 5 key findings →
Evidence: low
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Fourteen case histories of persons who had a histological diagnosis of either senile dementia of the Alzheimer type, multiinfarct dementia, or a mixed dementia composed of these two types and who showed evidence of a moderate to severe dementia on psychological testing were rated for the presence of thirteen clinical features comprising Hachinski's Ischemic Score. 5 key findings →
Evidence: low
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Mild cognitive impairment (MCI) is an intermediate stage in the trajectory from normal cognition to dementia. 4 key findings →
Evidence: low
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This study examined the validity of the four standard psychological paradigms that have been operationally defined within the CogState brief computerized cognitive assessment battery. 1 key finding →
Evidence: low
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A chart-based instrument for delirium, which should be useful for patient safety and quality-improvement programs in older persons, was validated. 5 key findings →
Evidence: low
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Chronic traumatic encephalopathy (CTE) is a form of neurodegeneration believed to result from repeated head injuries. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The brains of 232 patients with a case-note diagnosis of schizophrenia or affective disorder who died in one mental hospital over a period of 22 years were weighed, and were assessed in a coronal section at the level of the interventricular foramina. 3 key findings →
Participants: 232 Evidence: low
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Lesions of the cerebral white matter (WM) result in focal neurobehavioral syndromes, neuropsychiatric phenomena, and dementia. 3 key findings →
Evidence: low
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In order to observe changes owing to aging and Alzheimer's disease (AD) in the volumes of subdivisions of the hippocampus and the number of neurons of the hippocampal formation, 18 normal brains from subjects who died of nonneurological causes and had no history of long-term illness or dementia (ten of these brains comprised the aged control group) and 13 AD brains were analyzed. 3 key findings →
Design: cross-sectional Evidence: low
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Normative developmental equations provide reliable descriptors of brain electrical activity in people 6 to 90 years old. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Full text may need a subscription
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 28,180 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.
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 →