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Anticholinergic Use Among the Elderly With Alzheimer Disease in South Korea: A Population-based Study
Kyung-In Joung1,2, Ju-Young Shin2, Sukil Kim3
1Department of Public Health Science, Graduate School of Public Health and Institute of Health and Environment, Seoul National University.
Objectives:
To investigate the characteristics of anticholinergic use in the elderly with Alzheimer disease (AD) compared with those in the non-AD elderly.
Methods:
Using the Korean National Health Insurance Service Elderly cohort database, 388,629 adults aged 70 years and older in 2012 were included. The use of strong anticholinergic agents (ACs) in 2012 was quantified by standardized prescribed doses. Univariate and multivariate logistic regression models were applied to examine the level of their heavy use (≥90 doses of the prescribed amount in 2012) in patients with AD and potential explanations of the heavy use.
Results:
Antihistamines and antidepressants were the most prescribed strong ACs among non-AD and AD elderly, respectively. The heavy use of strong ACs was more prevalent in patients with AD than in non-AD elderly [odds ratio (95% confidence interval)=1.48 (1.41-1.56)]. When the morbidities associated with AD were adjusted for, odds ratio were reduced [0.91 (0.85-0.96)].
Conclusions:
Heavy use of strong ACs was more prevalent in patients with AD than in non-AD elderly. Multiple ACs for treating multimorbidities in AD were mainly attributable to their heavy use. In patients with AD, the integrated management of medications for reducing the preventable heavy use of these drugs should be reinforced.
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