Racial differences in anticholinergic use among community-dwelling elders

Abstract

Objective: Few studies have examined racial differences in potentially inappropriate medication use. The objective of this study was to examine racial disparities in using prescription and/or nonprescription anticholinergics, a type of potentially inappropriate medication, over time.

Design: Longitudinal.

Setting: Data from the Health, Aging, and Body Composition Study (years 1, 5, and 10).

Participants: Three thousand fifty-five community-dwelling older adults, both blacks and whites, at year 1.

Main outcome measure: Highly anticholinergic medication use per the 2012 American Geriatrics Society Updated Beers Criteria for Potentially Inappropriate Medication Use in Older Adults.

Results: Blacks represented 41.4% of the participants at year 1. At year 1, 13.4% of blacks used an anticholinergic medication compared with 17.8% of whites, and this difference persisted over the ensuing 10-year period. Diphenhydramine was the most common anticholinergic medication reported at baseline and year 5, and meclizine at year 10, for both races. Controlling for demographics, health status, and access to care factors, blacks were 24% to 45% less likely to use any anticholinergics compared with whites over the years considered (all P < 0.05).

Conclusion: The use of prescription and/or nonprescription anticholinergic medications was less common in older blacks than whites over a 10-year period, and the difference was unexplained by demographics, health status, and access to care.