These results indicate an association between brain hypoperfusion and the dementia of AD. 5 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source
27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
These results indicate an association between brain hypoperfusion and the dementia of AD. 5 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source
The use of methods that focus on determining a single underlying cause may lead to underestimation of the extent of the contribution of some diseases such as dementia and respiratory disease to death in older adults and overestimation of the contribution of other diseases. 1 key finding →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source
Plasma biomarker results confirm cerebrospinal fluid studies reporting increased levels of pancreatic polypeptide and N-terminal protein B-type brain natriuretic peptide in patients with AD and mild cognitive impairment. 3 key findings →
Design: cohort study Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
None of the lifestyle variables were correlated with the biomarkers, and the path associations between lifestyle variables and biomarkers were not significant (p > 0.05). 3 key findings →
Participants: 515 Evidence: low
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These results suggest that GSTO locus variants may lower brain GSTO2 levels and consequently confer AD risk in older age. 5 key findings →
Evidence: low
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MLGPs provide an alternative analytical approach to predict an individual's genetic risk for episodic memory performance, a surrogate indicator of LOAD. 3 key findings →
Participants: 1,365 Evidence: low
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Studies have shown that donepezil could reduce the AD assessment scale-cognitive subscale (ADAS-Cog) score in MCI patients and improve the patient's attention and speed of response; however, it also has many side effects. 3 key findings →
Evidence: high
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Patterns of dementia are known to fall into dissociated but dispersed brain networks, suggesting that the disease is transmitted along neuronal pathways rather than by proximity. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Posterior cortical atrophy (PCA) is a neurodegenerative syndrome that is characterised by progressive decline in visuospatial, visuoperceptual, literacy, and praxic skills. 5 key findings →
Evidence: low
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Dementia is one of the most common and important aspects of Parkinson's disease and has consequences for patients and caregivers, and has health-related costs. 2 key findings →
Evidence: low
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The Patient Protection and Affordable Care Act added a new Medicare benefit, the Annual Wellness Visit (AWV), effective January 1, 2011. 5 key findings →
Evidence: low
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Our study suggests that slow gait precedes cognitive decline. 5 key findings →
Participants: 1,478 Evidence: low
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Anxiety, apathy and depression are common in subjects with mild cognitive impairment (MCI) and may herald Alzheimer's disease (AD). 4 key findings →
Participants: 268 Evidence: low
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Rapid eye movement sleep behavior disorder (RBD) is common in Parkinson disease (PD), but its relationship to the varied neurotransmitter deficits of PD and prognostic significance remain incompletely understood. 4 key findings →
Participants: 35 Evidence: low
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Cognitive impairment is a frequent feature of COPD. 4 key findings →
Design: longitudinal study Evidence: moderate
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In Alzheimer disease (AD), amyloid β peptide (Aβ) accumulates in plaques in the brain. 4 key findings →
Evidence: low
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Niemann-Pick disease, type C1 (NPC1) is a lipid storage disorder that results in progressive neurological impairment. 2 key findings →
Design: longitudinal study Evidence: moderate
Full summary, score breakdown and related studies → Original source
Glial fibrillary acidic protein (GFAP) is the main astrocytic intermediate filament (IF). 1 key finding →
Evidence: low
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Electroconvulsive therapy (ECT) is an effective strategy in some treatment-resistant patients with schizophrenia. 2 key findings →
Evidence: high
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Two randomized controlled trials were included, one was scale A, and the other was scale B. The rates of abnormal liver function, withdrawal from treatment, and withdrawal due to adverse effects were higher in the treatment group (OR = 7.86, 95%CI: 2.50-24.69; OR = 4.70, 95%CI: 2.61-8.44; and OR = 5.47, 95%CI: 3.01-9.94; respectively) compared with the placebo group. 3 key findings →
Design: systematic review Participants: 710 Evidence: high
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For hypertension, CHD, and stroke, there is convincing evidence that increasing the consumption of vegetables and fruit reduces the risk of disease. 5 key findings →
Evidence: low
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Imaging has played a variety of roles in the study of Alzheimer disease (AD) over the past four decades. 5 key findings →
Evidence: low
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The Alzheimer disease and frontotemporal dementia (AD&FTLD) and Parkinson disease (PD) Mutation Databases make available curated information of sequence variations in genes causing Mendelian forms of the most common neurodegenerative brain disease AD, frontotemporal lobar degeneration (FTLD), and PD. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The findings support recent data indicating that the MoCA is superior to the MMSE as a global assessment tool, particularly in discerning earlier stages of cognitive decline. 3 key findings →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Compared with typical AD, hippocampal-sparing AD has more neurofibrillary tangles in the cortex and fewer in the hippocampus, whereas the opposite pattern is seen in limbic-predominant AD. 1 key finding →
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 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 →