Table 2.

Variables associated with medication-related harm before and after adjusting for confounding factors in multivariate logistic regression analysis

Variable	Unadjusted odds ratio (95% CI)	Adjusted odds ratio (95% CI)
Age (years)	1.01 (0.99, 1.04)	1.02 (0.99, 1.05)
Charlson Comorbidity Index	0.96 (0.86, 1.07)	0.96 (0.86, 1.08)
Total number of blood-pressure lowering medications	1.63 (1.29, 2.07)	1.45 (1.11, 1.88)
CCB	2.03 (1.36, 3.03)	1.39 (0.86, 2.24)
CCB and ACEI/ARB	2.05 (1.09, 3.85)	1.37 (0.68, 2.76)
CCB, ACEI/ARB and Beta-blocker	3.33 (1.41, 7.86)	1.40 (0.56, 3.75)

ACEI, angiotensin-converting-enzyme inhibitor; ARB, angiotensin II receptor blocker; CCB, calcium channel blocker; CI, confidence interval.