1. The Prevalence of Mild Cognitive Impairment in Diverse Geographical and Ethnocultural Regions: The COSMIC Collaboration.
- Author
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Sachdev PS, Lipnicki DM, Kochan NA, Crawford JD, Thalamuthu A, Andrews G, Brayne C, Matthews FE, Stephan BC, Lipton RB, Katz MJ, Ritchie K, Carrière I, Ancelin ML, Lam LC, Wong CH, Fung AW, Guaita A, Vaccaro R, Davin A, Ganguli M, Dodge H, Hughes T, Anstey KJ, Cherbuin N, Butterworth P, Ng TP, Gao Q, Reppermund S, Brodaty H, Schupf N, Manly J, Stern Y, Lobo A, Lopez-Anton R, and Santabárbara J
- Subjects
- Aged, Aged, 80 and over, Asia epidemiology, Australia epidemiology, Cooperative Behavior, Cross-Sectional Studies, Dementia epidemiology, Disease Progression, Europe epidemiology, Female, Humans, Longitudinal Studies, Male, Middle Aged, Neuropsychological Tests, Prevalence, Cognitive Dysfunction epidemiology
- Abstract
Background: Changes in criteria and differences in populations studied and methodology have produced a wide range of prevalence estimates for mild cognitive impairment (MCI)., Methods: Uniform criteria were applied to harmonized data from 11 studies from USA, Europe, Asia and Australia, and MCI prevalence estimates determined using three separate definitions of cognitive impairment., Results: The published range of MCI prevalence estimates was 5.0%-36.7%. This was reduced with all cognitive impairment definitions: performance in the bottom 6.681% (3.2%-10.8%); Clinical Dementia Rating of 0.5 (1.8%-14.9%); Mini-Mental State Examination score of 24-27 (2.1%-20.7%). Prevalences using the first definition were 5.9% overall, and increased with age (P < .001) but were unaffected by sex or the main races/ethnicities investigated (Whites and Chinese). Not completing high school increased the likelihood of MCI (P ≤ .01)., Conclusion: Applying uniform criteria to harmonized data greatly reduced the variation in MCI prevalence internationally.
- Published
- 2015
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