28,180 Alzheimer's and dementia studies in plain English, each scored out of 100.
Among patients with probable Alzheimer disease and agitation who were receiving psychosocial intervention, the addition of citalopram compared with placebo significantly reduced agitation and caregiver distress; however, cognitive and cardiac adverse effects of citalopram may limit its practical application at the dosage of 30 mg per day. 5 key findings →
Participants: 186 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Among patients with mild to moderate AD, 2000 IU/d of alpha tocopherol compared with placebo resulted in slower functional decline. 5 key findings →
Participants: 152 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Frontotemporal dementia (FTD) is a complex disorder characterised by a broad range of clinical manifestations, differential pathological signatures, and genetic variability. 4 key findings →
Design: meta-analysis Participants: 3,526 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Analysis confirmed the association of APOE with earlier AAO (P = 3.3 × 10(-96)), with associations in CR1 (rs6701713, P = 7.2 × 10(-4)), BIN1 (rs7561528, P = 4.8 × 10(-4)), and PICALM (rs561655, P = 2.2 × 10(-3)) reaching statistical significance (P Conclusions and relevance We confirmed an association of APOE (OMIM 107741) variants with AAO among affected participants with LOAD and observed novel associations of CR1 (OMIM 120620), BIN1 (OMIM 601248), and PICALM (OMIM 603025) with AAO. 3 key findings →
Design: meta-analysis Participants: 9,162 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Hippocampal sclerosis of aging (HS-Aging) is a high-morbidity brain disease in the elderly but risk factors are largely unknown. 4 key findings →
Design: meta-analysis Participants: 624 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Hearing impairment in older adults is independently associated in longitudinal studies with accelerated cognitive decline and incident dementia, and in cross-sectional studies, with reduced volumes in the auditory cortex. 5 key findings →
Design: cross-sectional Participants: 126 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Alzheimer's disease (AD) and related dementias are a major public health challenge and present a therapeutic imperative for which we need additional insight into molecular pathogenesis. 2 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The findings support the cross-cultural use of a relatively inexpensive odor identification test as an early biomarker of cognitive decline and AD dementia. 1 key finding →
Participants: 1,037 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
We recommend a new term, "primary age-related tauopathy" (PART), to describe a pathology that is commonly observed in the brains of aged individuals. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Much of the genetic basis for Alzheimer disease (AD) is unexplained. 4 key findings →
Design: meta-analysis Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Solanezumab, a humanized monoclonal antibody that binds amyloid, failed to improve cognition or functional ability.
Full summary, score breakdown and related studies → Original source Free full text
Cognitive impairment is one of the earliest, most common, and most disabling non-motor symptoms in Parkinson's disease (PD). 4 key findings →
Design: cohort study Participants: 360 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Patient treatment with sertraline was not associated with significantly greater reductions in caregiver distress than placebo treatment. 5 key findings →
Participants: 131 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Cerebrospinal fluid and positron emission tomography amyloid-β were measured at baseline in 769 persons [161 healthy controls, 68 subjective memory complaints, 419 mild cognitive impairment and 121 Alzheimer's disease dementia, mean age 72 years (standard deviation 7 years), 47% females] and used to predict diagnosis, APOE ε4 carriage status, cerebral blood flow, cerebrospinal fluid total-tau and phosphorylated-tau levels (cross-sectionally); and hippocampal volume, fluorodeoxyglucose positron emission tomography results and Alzheimer's Disease Assessment Scale-cognitive subscale scores (longitudinally). 2 key findings →
Participants: 769 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Our data indicate that the APOE ε4 allele is an important predictor of cognitive function in PD across multiple domains. 5 key findings →
Participants: 1,079 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
We examined regional distribution patterns of phosphorylated 43-kDa TAR DNA-binding protein (pTDP-43) intraneuronal inclusions in frontotemporal lobar degeneration (FTLD). 1 key finding →
Participants: 39 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Based on previous studies, a preclinical classification for Alzheimer's disease (AD) has been proposed. 4 key findings →
Design: cross-sectional Participants: 160 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
A new secondary prevention trial in older people with amyloid accumulation at high risk for Alzheimer's disease dementia should provide insights into whether anti-amyloid therapy can delay cognitive decline. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
This protocol describes a primary neuronal model of formation of α-synuclein (α-syn) aggregates that recapitulate features of the Lewy bodies and Lewy neurites found in Parkinson's disease brains and other synucleinopathies. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
These findings confirm that MCI is associated with widespread cortical atrophy. 5 key findings →
Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Frontotemporal lobar degeneration (FTLD) comprises two main classes of neurodegenerative diseases characterized by neuronal/glial proteinaceous inclusions (i.e., proteinopathies) including tauopathies (i.e., FTLD-Tau) and TDP-43 proteinopathies (i.e., FTLD-TDP) while other very rare forms of FTLD are known such as FTLD with FUS pathology (FTLD-FUS). 4 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Clinical trials to advance the diagnosis and treatment of Alzheimer disease (AD) may expose research subjects to discrimination risks. 3 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Neurodegenerative diseases, such as Alzheimer disease, result in cognitive decline and dementia and are a leading cause of mortality in the growing elderly population. 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 28,180 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 →