alzhub.org
Get help now — free helplines

You can call any of these for free. You do not need a diagnosis, an appointment, or a crisis to call — questions and plain exhaustion are reasons enough.

  • Alzheimer's Association 24/7 Helpline 800-272-3900 24 hours a day, 365 days a year Free, confidential support and information for people with dementia, caregivers, families and the public. Master's-level clinicians. Also Spanish.
  • 988 Suicide & Crisis Lifeline 988 24/7 Call or text 988, or chat at 988lifeline.org. For anyone in emotional distress or a mental-health crisis, including caregivers.
  • Alzheimer's Foundation of America (AFA) Helpline 866-232-8484 9:00 am - 9:00 pm ET, seven days a week Licensed social workers providing support, info and referrals. Also text message and web chat. Text: 646-586-5283

In a medical emergency, call 911. More numbers, and what each line does, on the help page.

Research

32,180 Alzheimer's and dementia studies in plain English, each scored out of 100.

Find studies

Showing 26–50 of 75 studies with an author at Harvard University (US) of type cross-sectional study (page 2 of 3) · 32,180 in the whole library · How the 0–100 score works

Download bibliography of these 75 studies, in this order: BibTeX (.bib) · RIS (.ris)

Browse by subject, author or institution

Each number is how many studies that link shows, with your other filters kept.

Subjects

Authors

Names as each record prints them; the same person can appear under two spellings.

Other institutions

From OpenAlex; 17,651 studies have no institution on record and are not counted here.

A note on reading research. One study is rarely the final word.

We try to note the size of a study, whether it was in humans or animals, and how early-stage the finding is. If a summary here doesn't make that clear, treat it with extra caution and check the original source.

Parental History of Memory Impairment and β-Amyloid in Cognitively Unimpaired Older Adults

✓ Peer-reviewed alzhub usefulness score 61 out of 100. JAMA neurology 2024-08-01

Of 4413 individuals (mean [SD] age, 71.27 [4.66] years, 2617 women [59.3%]), mean Aβ-PET was elevated in individuals with history of memory impairment in both parents (n = 455; mean [SD] standardized uptake value ratio [SUVR] = 1.12 [0.19]; Wilcoxon P = 1.1 × 10-5) and in those with only maternal history (n = 1772; mean [SD] SUVR = 1.10 [0.19]; Wilcoxon P = 2.70 × 10-5) compared with those with only paternal history (n = 632; mean [SD] SUVR = 1.08 [0.18]; Wilcoxon P = 1.1 × 10-5) or no family history (n = 1554; mean [SD] SUVR = 1.08 [0.19]; Wilcoxon P = 1.1 × 10-5). 3 key findings →

Design: cross-sectional Participants: 455 Evidence: high

Full summary, score breakdown and related studies → Original source Free full text

α-Synuclein and tau concentrations in cerebrospinal fluid of patients presenting with parkinsonism: a cohort study

✓ Peer-reviewed alzhub usefulness score 61 out of 100. The Lancet. Neurology 2011-03-01

In our training set, people with Parkinson's disease, multiple system atrophy, and dementia with Lewy bodies had lower CSF α-synuclein concentrations than patients with Alzheimer's disease and other neurological disorders. 1 key finding →

Design: cross-sectional Evidence: moderate

Full summary, score breakdown and related studies → Original source Full text may need a subscription

Comparison of amyloid burden in individuals with Down syndrome versus autosomal dominant Alzheimer's disease: a cross-sectional study

✓ Peer-reviewed alzhub usefulness score 60 out of 100. The Lancet. Neurology 2023-01-01

Global PET amyloid burden was compared with regards to cognitive status, APOE ɛ4 status, sex, age, and estimated years to symptom onset. 2 key findings →

Design: cross-sectional Participants: 216 Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Association of Brain Amyloid-β With Slow Gait in Elderly Individuals Without Dementia: Influence of Cognition and Apolipoprotein E ε4 Genotype

✓ Peer-reviewed alzhub usefulness score 60 out of 100. JAMA neurology 2017-01-01

Among the 183 study participants, mean (SD) age was 85.5 (3) years, 76 were women (41.5%), and 177 were white (96.7%). 4 key findings →

Design: cross-sectional Participants: 183 Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Longitudinal change in CSF biomarkers in autosomal-dominant Alzheimer's disease

✓ Peer-reviewed alzhub usefulness score 60 out of 100. Science translational medicine 2014-03-01

Clinicopathological evidence suggests that the pathology of Alzheimer's disease (AD) begins many years before the appearance of cognitive symptoms. 3 key findings →

Design: cross-sectional Evidence: moderate

Full summary, score breakdown and related studies → Original source Free full text

Association Between Amyloid and Tau Accumulation in Young Adults With Autosomal Dominant Alzheimer Disease

✓ Peer-reviewed alzhub usefulness score 60 out of 100. JAMA neurology 2018-05-01

Compared with noncarriers, cognitively unimpaired mutation carriers had elevated mean cortical Pittsburgh Compound B distribution volume ratio levels in their late 20s, and 7 of 9 carriers older than 30 years reached the threshold for amyloidosis (distribution volume ratio level > 1.2). 4 key findings →

Design: cross-sectional Participants: 24 Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Association of Higher Cortical Amyloid Burden With Loneliness in Cognitively Normal Older Adults

✓ Peer-reviewed alzhub usefulness score 60 out of 100. JAMA psychiatry 2016-12-01

Loneliness is a perceived state of social and emotional isolation that has been associated with cognitive and functional decline and an increased risk of incident AD dementia. 5 key findings →

Design: cross-sectional Participants: 25 Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Quality of End-of-Life Care Provided to Patients With Different Serious Illnesses

✓ Peer-reviewed alzhub usefulness score 59 out of 100. JAMA internal medicine 2016-08-01

Among 57 753 decedents, approximately half of the patients with ESRD, cardiopulmonary failure, or frailty received palliative care consultations (adjusted proportions, 50.4%, 46.7%, and 43.7%, respectively) vs 73.5% of patients with cancer and 61.4% of patients with dementia (P Conclusions and relevance Family-reported quality of end-of-life care was significantly better for patients with cancer and those with dementia than for patients with ESRD, cardiopulmonary failure, or frailty, largely owing to higher rates of palliative care consultation and do-not-resuscitate orders and fewer deaths in the intensive care unit among patients with cancer and those with dementia. 2 key findings →

Design: cross-sectional Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Definition and description of schizophrenia in the DSM-5

✓ Peer-reviewed alzhub usefulness score 58 out of 100. Schizophrenia research 2013-06-22

Although dementia praecox or schizophrenia has been considered a unique disease for over a century, its definitions and boundaries have changed over this period and its etiology and pathophysiology remain elusive. 5 key findings →

Design: cross-sectional Evidence: moderate

Full summary, score breakdown and related studies → Original source Full text may need a subscription

Impaired default network functional connectivity in autosomal dominant Alzheimer disease

✓ Peer-reviewed alzhub usefulness score 58 out of 100. Neurology 2013-07-24

These findings suggest that DMN fcMRI may prove useful as a biomarker across a wide spectrum of disease, and support the feasibility of DMN fcMRI as a secondary endpoint in upcoming multicenter clinical trials in Alzheimer disease. 2 key findings →

Design: cross-sectional Evidence: moderate

Full summary, score breakdown and related studies → Original source Free full text

Blood-based AT(N) biomarkers for Alzheimer's disease and frontotemporal lobar degeneration in Latin America

✓ Peer-reviewed alzhub usefulness score 57 out of 100. Nature Aging 2026-02-13

Dementia diagnosis increasingly relies on blood-based biomarkers, yet their performance in diverse populations remains insufficiently characterized. 1 key finding →

Design: cross-sectional Participants: 605 Evidence: moderate

Full summary, score breakdown and related studies → Original source Free full text

Neuropathological alterations in Alzheimer disease

✓ Peer-reviewed alzhub usefulness score 57 out of 100. Cold Spring Harbor perspectives in medicine 2011-09-01

The neuropathological hallmarks of Alzheimer disease (AD) include "positive" lesions such as amyloid plaques and cerebral amyloid angiopathy, neurofibrillary tangles, and glial responses, and "negative" lesions such as neuronal and synaptic loss. 4 key findings →

Design: cross-sectional Evidence: moderate

Full summary, score breakdown and related studies → Original source Free full text

Association of Seizure Foci and Location of Tau and Amyloid Deposition and Brain Atrophy in Patients With Alzheimer Disease and Seizures

✓ Peer-reviewed alzhub usefulness score 56 out of 100. Neurology 2024-09-27

Our results reveal a spatial association between the epileptogenic focus and tau deposition, amyloid deposition, and neurodegeneration in early clinical stages of AD. 5 key findings →

Design: cross-sectional Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Associations between biomarkers and age in the presenilin 1 E280A autosomal dominant Alzheimer disease kindred: a cross-sectional study

✓ Peer-reviewed alzhub usefulness score 56 out of 100. JAMA neurology 2015-03-01

Age-associated changes in brain imaging and fluid biomarkers are characterized and compared in presenilin 1 (PSEN1)E280A mutation carriers and noncarriers from the world's largest known autosomal dominant Alzheimer disease (AD) kindred. 4 key findings →

Design: cross-sectional Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Regional cortical thinning predicts worsening apathy and hallucinations across the Alzheimer disease spectrum

✓ Peer-reviewed alzhub usefulness score 56 out of 100. The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry 2013-07-24

Cross-sectional and longitudinal studies. 4 key findings →

Design: cross-sectional Participants: 413 Evidence: moderate

Full summary, score breakdown and related studies → Original source Free full text

Self- and Informant-Report Cognitive Decline Discordance and Mild Cognitive Impairment Diagnosis

✓ Peer-reviewed alzhub usefulness score 56 out of 100. JAMA Network Open 2025-04-18

ADNI participants (921 dyads) had a mean (SD) age of 71 (7) years and mean (SD) of 17 (3) years of education; 485 (53%) were female, 30 (3%) were Asian, 105 (11%) were Black, and 756 (82%) were White. eVAL participants (279 dyads) had a mean (SD) age of 71 (8) years and mean (SD) of 17 (2) years of education; 151 (54%) were female, 17 (6%) were Asian, 12 (4%) were Black, and 245 (88%) were White. 5 key findings →

Design: cross-sectional Participants: 921 Evidence: moderate

Full summary, score breakdown and related studies → Original source Free full text

Brain Imaging and Blood Biomarker Abnormalities in Children With Autosomal Dominant Alzheimer Disease: A Cross-Sectional Study

✓ Peer-reviewed alzhub usefulness score 55 out of 100. JAMA neurology 2015-08-01

Similar to findings in adult mutation carriers, in the later preclinical and clinical stages of ADAD, mutation-carrying children were distinguished from control individuals by significantly higher plasma Aβ1-42 levels (mean [SD]: carriers, 18.8 [5.1] pg/mL and noncarriers, 13.1 [3.2] pg/mL; P Conclusions and relevance Children at genetic risk for ADAD have functional and structural brain changes and abnormal levels of plasma Aβ1-42. 2 key findings →

Design: cross-sectional Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Association of Memory Impairment With Concomitant Tau Pathology in Patients With Cerebral Amyloid Angiopathy

✓ Peer-reviewed alzhub usefulness score 55 out of 100. Neurology 2021-02-24

These results suggest that the presence of objective memory impairment in patients with probable CAA could serve as a marker for underlying tau pathology. 4 key findings →

Design: cross-sectional Participants: 39 Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Odor identification and Alzheimer disease biomarkers in clinically normal elderly

✓ Peer-reviewed alzhub usefulness score 55 out of 100. Neurology 2015-05-01

Our objective was to investigate cross-sectional associations between odor identification ability and imaging biomarkers of neurodegeneration and amyloid deposition in clinically normal (CN) elderly individuals, specifically testing the hypothesis that there may be an interaction between amyloid deposition and neurodegeneration in predicting odor identification dysfunction. 1 key finding →

Design: cross-sectional Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

Tau Positron Emission Tomographic Imaging in the Lewy Body Diseases

✓ Peer-reviewed alzhub usefulness score 55 out of 100. JAMA neurology 2016-11-01

Twenty-four patients with Lewy body disease (7 DLB, 8 PD-impaired, and 9 PD-normal) underwent multimodal brain imaging, cognitive testing, and neurologic evaluation, and imaging measures were compared with those of an independently acquired group of 29 controls with minimal brain amyloid burden as measured with carbon 11-labeled Pittsburgh Compound B ([11C]PiB) positron emission tomography (PET). 5 key findings →

Design: cross-sectional Evidence: low

Full summary, score breakdown and related studies → Original source Free full text

↑ Change the filters

Where “Free full text” comes from

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

How the 0–100 score works — and why some entries are capped

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.

  • Journal tier up to 10 pts
  • Journal's citation record up to 4 pts
  • Study design up to 12 pts
  • Strength of evidence up to 5 pts
  • Peer-review validation up to 10 pts
  • How recent up to 5 pts
  • Sample size up to 4 pts
  • Effect reported up to 3 pts
  • Studied in people up to 3 pts
  • Randomized / blinded up to 2 pts
  • Times cited up to 7 pts
  • Citations per year up to 5 pts
  • Impact for its field and year up to 6 pts
  • Cited by studies here up to 6 pts
  • Still being cited up to 4 pts
  • Senior author's track record up to 4 pts
  • Institution's track record up to 3 pts
  • Multicenter collaboration up to 3 pts
  • Indexed in PubMed up to 2 pts
  • Free to read up to 2 pts

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 32,180 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.

What this library is — and isn't

This is a large sample of the Alzheimer's literature, not an exhaustive index of it. It holds 32,180 records, built mostly from automated pulls of Europe PMC (66.5% of the library) and OpenAlex (15.8%), 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.

1,045 records (3.2% of the library) are not peer-reviewed — 966 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 →

Newest studies, as a dated timeline →    Atom feed    Where this research is being discussed: events

Last updated