. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Int J Geriatr Psychiatry. 2013 Apr 19;29(1):10.1002/gps.3968. doi: 10.1002/gps.3968

Table 4.

Influence of Depression on Two-year COPD Maintenance Medication Use and Adherence in Medicare Part D Beneficiaries with COPD – Sensitivity Analysis^a

Models	Medication Adherence
	Discontinuation			PDC (>=0.8)

		Lower	Upper		Lower	Upper
	PR	95% CI	95% CI	PR	95% CI	95% CI
I: excluding asthma	1.07	1.01	1.14	0.91	0.87	0.95

II: excluding bipolar and/or other psychotic disorders	1.08	1.03	1.13	0.90	0.87	0.93

IIIa: using PDC cut point 0.90				0.83	0.79	0.87
IIIb: using PDC cut point 0.70				0.92	0.89	0.94

IV: excluding benes died in 2006	1.10	1.05	1.16	0.87	0.84	0.91

PR: prevalence ratios; CI: confidence intervals. Multivariable models used modified Poisson regression and log link with generalized estimating equations. Bold numbers indicate P < 0. 05

Limited to who had any COPD maintenance medication and had at least two Part D claims (n=35,985)