Cited by 523Dementia and Cognitive Impairment ResearchAging and Gerontology ResearchAging, Health, and Disability

The DOI matches its Crossref record; 41 of the 42 references it cites were found in a registry or an index.

Dementia incidence continues to increase with age in the oldest old: The 90+ study

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Abstract

Objective: The oldest old are the fastest growing segment of the US population, and accurate estimates of dementia incidence in this group are crucial for healthcare planning. Although dementia incidence doubles every 5 years from ages 65 to 90 years, it is unknown if this exponential increase continues past age 90 years. Here, we estimate age‐ and sex‐specific incidence rates of all‐cause dementia in people aged 90 years and older, including estimates for centenarians. Methods: Participants are from The 90+ Study, a population‐based longitudinal study of aging and dementia. Three hundred thirty nondemented participants aged 90 years and older at baseline were followed between January 2003 and December 2007. Age‐ and sex‐specific incidence rates of all‐cause dementia were estimated by person‐years analysis. Results: The overall incidence rate of all‐cause dementia was 18.2% (95% confidence interval [CI], 15.3–21.5) per year and was similar for men and women (risk ratio, 0.94; 95% CI, 0.65–1.37). Rates increased exponentially with age from 12.7% per year in the 90–94‐year age group, to 21.2% per year in the 95–99‐year age group, to 40.7% per year in the 100+‐year age group. The doubling time based on a Poisson regression was 5.5 years. Interpretation: Incidence of all‐cause dementia is very high in people aged 90 years and older and continues to increase exponentially with age in both men and women. Projections of the number of people with dementia should incorporate this continuing increase of dementia incidence after age 90 years. Our results foretell the growing public health burden of dementia in an increasingly aging population. ANN NEUROL 2010;67:114–121

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Metadata

Authors
Corrada, M. M., Brookmeyer, R., Paganini‐Hill, A., Berlau, D., & Kawas, C. H.
Affiliations
  • University of California, Irvine (US)
  • Johns Hopkins University (US)
  • University of Southern California (US)
Corresponding author
Corrada, María M.
Venue
Annals of Neurology
Publisher
Wiley
Published
2010-01
Volume
67
Issue
1
Pages
114-121
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W2116125119
Cited by
523
References
42
Citations by year
2026: 23 · 2025: 47 · 2024: 27 · 2023: 23 · 2022: 41 · 2021: 46 · 2020: 39 · 2019: 42 · 2018: 32 · 2017: 33 · 2016: 35 · 2015: 23 · 2014: 20 · 2013: 30 · 2012: 26
FWCI
12.15
Type
journal article
Language
en
Open access
Locations
  • Annals of Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
National Institute on Aging (R01AG021055, T32AG000096)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Social Sciences › Psychology › Developmental and Educational Psychology › Aging and Gerontology Research
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Aging, Health, and Disability
Keywords
dementia incidence, oldest old, centenarians, age-specific incidence, sex differences, dementia projections
MeSH terms
Age Factors, Aged, 80 and over, California, Dementia, Educational Status, Female, Follow-Up Studies, Humans, Longitudinal Studies, Male, Models, Biological, Psychiatric Status Rating Scales, Risk, Sex Factors, Incidence, Poisson Distribution

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