Cited by 246Dementia and Cognitive Impairment ResearchAlzheimer's disease research and treatmentsMenopause: Health Impacts and Treatments

Prevalence and incidence of clinically diagnosed Alzheimer's disease dementia from 1994 to 2012 in a population study

Open access
Rajan, Kumar B., Weuve, Jennifer, Barnes, Lisa L., Wilson, Robert S., Evans, Denis A.·2019·Alzheimer's & Dementia

Abstract

Introduction: The trends in prevalence and incidence of Alzheimer's disease (AD) dementia remain uncertain. Methods: A sample of 2794 participants with a clinical diagnosis for AD dementia were included. Results: The 2010 census standardized prevalence of AD dementia was 14.5% (95% CI = 13.7–15.3), and annual incidence was 2.3% (1.7–2.9). Both prevalence and incidence showed substantial variation over time, but no secular trends. The prevalence of AD dementia did not change significantly from 14.6% (95% CI = 13.0, 16.2) in 1994–1997 to 14.7% (95% CI = 13.2, 16.2) in 2010–2012 (P = .84). The annual incidence of AD dementia was 2.8% (95% CI = 2.2, 3.2) in 1998–2000 and 2.2% (95% CI = 1.6, 2.8) in 2004–2006 (P = .20) and remained steady in 2010–2012. The prevalence and incidence among African Americans were approximately twice than those among European Americans. Conclusions: The prevalence and incidence of AD dementia showed substantial variation between 1994 and 2012, but no secular trend.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.jalz.2018.07.216

Cites

21 of 21 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • In 2011, the average annual incidence of Alzheimer's dementia was 0.4% at ages 65-74, 3.2% at ages 75-84, and 7.6% at ages 85 and older.

    “in 2011 the average annual incidence in people age 65 to 74 was 0.4% (meaning four of every 1,000 people age 65 to 74 developed Alzheimer's dementia in 2011); in people age 75 to 84, the annual incidence was 3.2% (32 of every 1,000 people); and in people age 85 and older, the incidence was 7.6% (76 of every 1,000 people).259”

    From 2023 Alzheimer's disease facts and figures (2023) · cites this paper as [259]

    The Results section, “Average Prevalence and Annual Incidence of AD dementia” (page unavailable), says annual incidence rose sharply with age. But the passages in our copy do not give the claimed 0.4%, 3.2%, and 7.6% age-specific rates for 2011; the time-specific Results instead report an overall annual rate for 2010–2012. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Approximately 910,000 people age 65 or older developed Alzheimer's dementia in the United States in 2011, and this number would be expected to be higher in 2023 if CHAP estimates were available for that year.

    “approximately 910,000 people age 65 or older developed Alzheimer's dementia in the United States in 2011, a number that would be expected to be even higher in 2023 if CHAP estimates were available for that year.259”

    From 2023 Alzheimer's disease facts and figures (2023) · cites this paper as [259]

    The Results (‘Number of People in the US with Prevalence and Incidence of AD dementia’; page not provided) estimate 910,051 new US cases in 2011, based on CHAP projections for adults over 65. The Discussion identifies population aging as a driver of future estimates, but the paper does not estimate or state that the annual number of new cases would exceed the 2011 figure in 2023. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Most other prevalence studies indicate that Black older adults are about twice as likely to have Alzheimer's or other dementias as White older adults.

    “Most other prevalence studies also indicate that Black older adults are about twice as likely to have Alzheimer's or other dementias as White older adults.”

    From 2023 Alzheimer's disease facts and figures (2023) · cites this paper as [259]

    The Results (page unavailable in our copy) report that Alzheimer’s disease dementia prevalence was nearly twice as high among African Americans as European Americans (27.0% versus 13.3%) in this study. The Introduction says prior research found higher prevalence among African Americans, but the paper does not establish that most other studies found a twofold difference or address other dementias. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Approximately 910,000 people age 65 or older developed Alzheimer's dementia in the U.S. in 2011, a number that would be expected to be even higher in 2024 if CHAP estimates were available for that year.

    “According to estimates using data from the CHAP study and the U.S. Census Bureau, approximately 910,000 people age 65 or older developed Alzheimer's dementia in the U.S. in 2011, a number that would be expected to be even higher in 2024 if CHAP estimates were available for that year.”

    From 2024 Alzheimer's disease facts and figures (2024) · cites this paper as [284]

    The Results section ('Number of People in the US with Prevalence and Incidence of AD dementia'; page unavailable) estimates 910,051 new U.S. cases in 2011, using CHAP estimates projected to the U.S. population aged over 65. The Discussion says population aging will increase future estimates, but the paper gives no 2024 incidence estimate or explicit prediction that new cases in 2024 would exceed the 2011 count. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The rate at which new cases of Alzheimer's develop increases dramatically with age: in 2011 the average annual incidence in people age 65 to 74 was 0.4%; in people age 75 to 84, annual incidence was 3.2%; and in people age 85 and older, incidence was 7.6%.

    “The rate at which new cases of Alzheimer's develop increases dramatically with age: according to estimates from CHAP, in 2011 the average annual incidence in people age 65 to 74 was 0.4% (meaning four of every 1,000 people age 65 to 74 developed Alzheimer's dementia in 2011); in people age 75 to 84, the annual incidence was 3.2% (32 of every 1,000 people); and in people age 85 and older, the incid”

    From 2024 Alzheimer's disease facts and figures (2024) · cites this paper as [284]

    Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Rajan, K. B., Weuve, J., Barnes, L. L., Wilson, R. S., & Evans, D. A.
Affiliations
  • University of California, Davis (US)
  • Boston University (US)
  • Rush University Medical Center (US)
  • Rush University (US)
Corresponding author
Rajan, Kumar B.
Venue
Alzheimer's & Dementia
Publisher
Wiley
Published
2018-09-06
Volume
15
Issue
1
Pages
1-7
ISSN
  • 1552-5260 (ISSN-L)
  • 1552-5279
OpenAlex
W2891083286
Cited by
245
References
21
Citations by year
2026: 18 · 2025: 22 · 2024: 47 · 2023: 38 · 2022: 36 · 2021: 37 · 2020: 29 · 2019: 17 · 2018: 1
FWCI
16.41
Type
journal article
Language
en
Open access
Locations
  • Alzheimer s & Dementia (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
National Institutes of Health (RF1-AG057532, R01-AG051635, R01-AG11101)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Menopause: Health Impacts and Treatments
Keywords
Alzheimer's disease, dementia
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Black or African American, Female, Humans, Male, Prospective Studies, Risk Factors, United States, Incidence, Prevalence, White People

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review