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

31,380 Alzheimer's and dementia studies in plain English, each scored out of 100.

Find studies

Showing 1–25 of 44 studies in Biomarkers with an author at University of Pennsylvania (US) (page 1 of 2) · 31,380 in the whole library · How the 0–100 score works

Download bibliography of these 44 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.

Other subjects

Authors

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

Other institutions

From OpenAlex; 16,851 studies have no institution on record and are not counted here.

What “Biomarkers” covers

Biomarkers — Measurable signals in blood, brain scans or spinal fluid that can indicate Alzheimer's changes.

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.

Association Between Longitudinal Plasma Neurofilament Light and Neurodegeneration in Patients With Alzheimer Disease

✓ Peer-reviewed alzhub usefulness score 76 out of 100. JAMA neurology 2019-07-01

The NfL level was increased at baseline in patients with mild cognitive impairment and AD dementia (mean levels: cognitive unimpairment, 32.1 ng/L; mild cognitive impairment, 37.9 ng/L; and AD dementia, 45.9 ng/L; P Conclusions and relevance The findings suggest that plasma NfL can be used as a noninvasive biomarker associated with neurodegeneration in patients with AD and may be useful to monitor effects in trials of disease-modifying drugs. 3 key findings →

Design: cohort study Participants: 1,583 Evidence: moderate

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

Predicting onset of symptomatic Alzheimer's disease with plasma p-tau217 clocks

✓ Peer-reviewed alzhub usefulness score 70 out of 100. Nature medicine 2026-02-19

Predicting not just if, but also when, cognitively unimpaired individuals are likely to develop onset of Alzheimer's disease (AD) symptoms would be useful to clinical trials and, eventually, clinical practice. 2 key findings →

Design: cohort Participants: 603 Evidence: moderate

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

Prevalence Estimates of Amyloid Abnormality Across the Alzheimer Disease Clinical Spectrum

✓ Peer-reviewed alzhub usefulness score 70 out of 100. JAMA neurology 2022-03-01

This study found that CSF-based estimates using adjusted data-driven cutoffs were up to 10% higher than PET-based estimates in people without dementia, whereas the results were similar among people with dementia. 3 key findings →

Design: cross-sectional Participants: 97 Evidence: moderate

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

Association of Cerebrospinal Fluid Neurofilament Light Protein Levels With Cognition in Patients With Dementia, Motor Neuron Disease, and Movement Disorders

✓ Peer-reviewed alzhub usefulness score 68 out of 100. JAMA neurology 2019-03-01

Cognitive testing follow-up occurred for 1 to 18 years (mean [SD], 0.98 [2.25] years); autopsy-verified diagnoses were available for 120 of 845 participants with diseases (14.2%). 2 key findings →

Design: case-control study Participants: 913 Evidence: moderate

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

Association of Cerebrospinal Fluid Neurofilament Light Concentration With Alzheimer Disease Progression

✓ Peer-reviewed alzhub usefulness score 67 out of 100. JAMA neurology 2016-01-01

Cerebrospinal fluid NFL concentration (median [interquartile range]) was higher in the AD dementia group (1479 [1134-1842] pg/mL), stable MCI group (no progression to AD during follow-up; 1182 [923-1687] pg/mL), and progressive MCI group (MCI with progression to AD dementia during follow-up; 1336 [1061-1693] pg/mL) compared with control participants (1047 [809-1265] pg/mL) (P Conclusions and relevance Cerebrospinal fluid NFL concentration is increased by the early clinical stage of AD and is associated with cognitive deterioration and structural brain changes over time. 2 key findings →

Design: longitudinal study Participants: 95 Evidence: moderate

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

Validation of Plasma Amyloid-β 42/40 for Detecting Alzheimer Disease Amyloid Plaques

✓ Peer-reviewed alzhub usefulness score 67 out of 100. Neurology 2021-12-14

Plasma Aβ42/Aβ40 is a robust measure for detecting amyloid plaques and can be utilized to aid in the diagnosis of AD, identify those at risk for future dementia due to AD, and improve the diversity of populations enrolled in AD research and clinical trials. 3 key findings →

Participants: 465 Evidence: moderate

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

Cerebrospinal fluid biomarker signature in Alzheimer's disease neuroimaging initiative subjects

✓ Peer-reviewed alzhub usefulness score 67 out of 100. Annals of Neurology 2009-03-19

CSF A beta(1-42) was the most sensitive biomarker for AD in the autopsy cohort of CSF samples: receiver operating characteristic area under the curve of 0.913 and sensitivity for AD detection of 96.4%. 4 key findings →

Evidence: moderate

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

Evaluation of Plasma Phosphorylated Tau217 for Differentiation Between Alzheimer Disease and Frontotemporal Lobar Degeneration Subtypes Among Patients With Corticobasal Syndrome

✓ Peer-reviewed alzhub usefulness score 66 out of 100. JAMA neurology 2023-05-01

Of 386 participants, 199 (52%) were female, and the mean (SD) age was 68 (8) years. 3 key findings →

Design: cohort study Participants: 113 Evidence: moderate

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

Concordance Between Amyloid-PET Quantification and Real-World Visual Reads

✓ Peer-reviewed alzhub usefulness score 63 out of 100. JAMA neurology 2025-09-01

Of 18 293 participants included in the parent study, scan images were available for 10 774 (59%), of which Centiloids were successfully calculated for 10 361 (96%). 1 key finding →

Design: cross-sectional Participants: 294 Evidence: low

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

Association of Plasma and Cerebrospinal Fluid Alzheimer Disease Biomarkers With Race and the Role of Genetic Ancestry, Vascular Comorbidities, and Neighborhood Factors

✓ Peer-reviewed alzhub usefulness score 62 out of 100. JAMA network open 2022-10-03

In this cross-sectional study of plasma biomarkers by race and genetic ancestry, the results indicated that plasma p-tau181, Aβ40, and NFL were lower in African American individuals based on self-reported race but not genetic ancestry. 3 key findings →

Design: cross-sectional Participants: 617 Evidence: low

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

Evaluation of Copathology and Clinical Trajectories in Individuals With Tau-Clinical Mismatch

✓ Peer-reviewed alzhub usefulness score 61 out of 100. JAMA Neurology 2025-12-15

A total of 365 participants (mean [SD] age, 75.4 [7.9] years; 192 female [52.6%]) in the ADNI tau-PET group and 524 participants (mean [SD] age, 77.1 [7.9] years; 268 male [51.1%]) in the ADNI p-tau217 group were selected from the 998 individuals who were Aβ+ in the ADNI cohort and used to generate tau-clinical mismatch models with 55.6% to 57.1% classified as canonical (CDR-SB commensurate to tau), 23.7% to 24.7% as resilient (CDR-SB tau). 5 key findings →

Design: cohort study Participants: 365 Evidence: moderate

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

Evaluation of ATNPD Framework and Biofluid Markers to Predict Cognitive Decline in Early Parkinson Disease

✓ Peer-reviewed alzhub usefulness score 60 out of 100. Neurology 2024-02-02

In patients with early PD, CSF p-tau 181 and t-tau were low compared with those in controls and did not increase over 5 years of follow-up. 3 key findings →

Design: longitudinal study Participants: 32 Evidence: moderate

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

Olfaction and Plasma Biomarkers of Alzheimer Disease and Neurodegeneration in the Atherosclerosis Risk in Communities Study

✓ Peer-reviewed alzhub usefulness score 60 out of 100. Neurology 2025-05-15

Our findings suggest that poor olfaction is associated with multiple AD-related and other neurodegenerative processes. 5 key findings →

Design: cross-sectional Participants: 1,545 Evidence: moderate

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

Herpes Viruses in the Baltimore Longitudinal Study of Aging: Associations With Brain Volumes, Cognitive Performance, and Plasma Biomarkers

✓ Peer-reviewed alzhub usefulness score 59 out of 100. Neurology 2022-10-31

These findings suggest an association of sHHV infection with white matter volume loss, attentional decline, and astrogliosis. 5 key findings →

Design: cross-sectional Participants: 119 Evidence: moderate

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

Autosomal dominant and sporadic late onset Alzheimer's disease share a common in vivo pathophysiology

✓ Peer-reviewed alzhub usefulness score 56 out of 100. Brain : a journal of neurology 2022-10-01

The extent to which the pathophysiology of autosomal dominant Alzheimer's disease corresponds to the pathophysiology of 'sporadic' late onset Alzheimer's disease is unknown, thus limiting the extrapolation of study findings and clinical trial results in autosomal dominant Alzheimer's disease to late onset Alzheimer's disease. 3 key findings →

Participants: 559 Evidence: low

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

Appropriate use criteria for amyloid PET: a report of the Amyloid Imaging Task Force, the Society of Nuclear Medicine and Molecular Imaging, and the Alzheimer's Association

✓ Peer-reviewed alzhub usefulness score 55 out of 100. Alzheimer's & dementia : the journal of the Alzheimer's Association 2013-01-01

Positron emission tomography (PET) of brain amyloid b is a technology that is becoming more available, but its clinical utility in medical practice requires careful definition. 5 key findings →

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 31,380 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.

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 31,380 records, built mostly from automated pulls of Europe PMC (65.6% of the library) and OpenAlex (16.2%), 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.

1,048 records (3.3% of the library) are not peer-reviewed — 973 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