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Research

27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.

Find studies

Showing 1–15 of 15 studies by Julie Zissimopoulos · 27,380 in the whole library · How the 0–100 score works

Download bibliography of these 15 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

Other authors

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

Institutions

From OpenAlex; 12,859 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.

Medicare's Annual Wellness Visit and diagnoses of dementias and cognitive impairment

✓ Peer-reviewed alzhub usefulness score 58 out of 100. Alzheimer s & Dementia Diagnosis Assessment & Disease Monitoring 2022-01-01

Beneficiaries included 2,713,573 White, 251,958 Black, 196,845 Hispanic, 95,719 Asian, 11,727 American Indian/Alaska Native, and 63,795 of other race/ethnicity. 5 key findings →

Design: retrospective cohort Participants: 3,333,617 Evidence: moderate

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

Trends in Incident Dementia Diagnosis Before and After Medicare Risk Adjustment

✓ Peer-reviewed alzhub usefulness score 50 out of 100. JAMA Network Open 2023-12-15

This cohort study examines rates of new diagnosis of Alzheimer disease and related dementias among beneficiaries of Medicare Advantage plans vs traditional Medicare from 2016 through 2020. 1 key finding →

Design: cohort study Evidence: moderate

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

Estimates of diagnosed dementia prevalence and incidence among diverse beneficiaries in traditional Medicare and Medicare Advantage

✓ Peer-reviewed alzhub usefulness score 45 out of 100. Alzheimer s & Dementia Diagnosis Assessment & Disease Monitoring 2023-07-01

Approximately half of Medicare beneficiaries are enrolled in Medicare Advantage (MA), a private plan alternative to traditional Medicare (TM). 3 key findings →

Evidence: low

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

Role of PCPs in diagnosing dementia in traditional Medicare and Medicare Advantage

✓ Peer-reviewed alzhub usefulness score 44 out of 100. Alzheimer s & Dementia 2025-10-01

Among a matched sample of 15,410,030 beneficiaries, accounting for both provider and patient characteristics, the incident dementia diagnosis rate was 0.11 percentage points lower for MA beneficiaries compared to TM beneficiaries attributed to the same PCP. 5 key findings →

Evidence: moderate

Full summary, score breakdown and related studies → Original source

Measuring Alzheimer's Disease and Other Dementias in Diverse Populations Using Medicare Claims Data

✓ Peer-reviewed alzhub usefulness score 43 out of 100. Journal of Alzheimer's disease : JAD 2019

We examined how methods used for identifying dementia in administrative claims affected dementia incidence across racial/ethnic populations using a 100% sample of Medicare beneficiaries (n = 23,793,452). 1 key finding →

Evidence: low

Full summary, score breakdown and related studies → Original source

After Risk-Adjustment Change, Dementia Diagnoses Increased In Medicare Advantage Relative To Traditional Medicare

✓ Peer-reviewed alzhub usefulness score 40 out of 100. Health Affairs 2025-01-01

In 2020, the Centers for Medicare and Medicaid Services reintroduced Alzheimer's disease and related dementias to its risk-adjustment payment model for Medicare Advantage (MA) plans. 5 key findings →

Evidence: low

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

Estimates of diagnosed dementia prevalence and incidence among diverse beneficiaries in Traditional Medicare and Medicare Advantage

✓ Peer-reviewed alzhub usefulness score 36 out of 100. Alzheimer s & Dementia 2023-12-01

Lower diagnosed dementia rates in MA compared to TM may exacerbate racial/ethnic disparities in diagnosed dementia. 4 key findings →

Evidence: low

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

Changes to Medicare Advantage Risk Adjustment and Dementia Diagnosis in Older Adults

✓ Peer-reviewed alzhub usefulness score 33 out of 100. Alzheimer s & Dementia 2024-12-01

Financial incentives to detect dementia resulted in more dementia diagnoses, particularly among persons at high risk of dementia and of undetected dementia but also raises concerns about diagnostic upcoding and the potential for over‐diagnosis. 3 key findings →

Evidence: low

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

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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
  • Randomised / 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
  • Multi-centre 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 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.

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 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 →

Newest studies, as a dated timeline →    Atom feed