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Temporal changes in the likelihood of dementia and MCI over 18 years in a population sample. | LitMetric

Temporal changes in the likelihood of dementia and MCI over 18 years in a population sample.

Neurology

From the Department of Public Health Sciences (K.B.R.) and Alzheimer's Disease Center (K.B.R.), University of California at Davis; Department of Epidemiology (J.W.), Boston University School of Public Health, MA; Rush Alzheimer's Disease Center (R.S.W., L.L.B.); and Department of Internal Medicine (E.A.M., D.A.E.), Rush University Medical Center, Chicago, IL.

Published: January 2020

Objective: To examine the temporal changes in the likelihood of dementia and mild cognitive impairment (MCI) between 1993 and 2012 using a short battery of cognitive tests.

Methods: A cohort of 10,342 participants underwent a short battery of cognitive tests collected during triennial in-home interviews with 2,794 of those evaluated for the clinical diagnosis of dementia and MCI. We used a generalized logit regression model to estimate the likelihood of dementia and MCI, and a quasibinomial regression model to examine the temporal changes in those likelihood scores.

Results: A short battery of cognitive tests-delayed story recall test, Symbol Digit Modalities Test, and the Mini-Mental State Examination-were associated with the clinical diagnosis of dementia and MCI. The classification accuracy of likelihood scores was 0.92 for dementia and 0.85 for MCI. After adjusting for age, race/ethnicity, and education, the likelihood of dementia in the population decreased from 21.6% (95% confidence interval [CI] 20.9%-22.3%) to 18.9% (95% CI 18.1%-19.7%) between 1993-1996 and 2000-2002 and showed no significant decline between 2000-2002 and 2009-2012 (-0.2%, 95% CI -1.1% to 0.7%). The estimated likelihood of MCI remained similar between 1993-1996 and 2009-2012 (29.0%, 95% CI 27.9%-30.1%), but showed a nonsignificant decrease in 2000-2002.

Conclusion: The likelihood scores based on a short battery of cognitive tests can serve as a measure of dementia and MCI in epidemiologic studies. The decline in the likelihood of dementia and MCI over earlier years was not sustained in later years.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7108808PMC
http://dx.doi.org/10.1212/WNL.0000000000008731DOI Listing

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