Table 1.

Characteristics of Beneficiaries with COPD Enrolled in Medicare Part D PDP Plans, Stratified by Depression Status (n=74,863)

			Depressiona
Characteristics	All COPD Beneficiaries		Yes		No
	N	%	N	%	N	%
Sample size	74,863	100.0	25,130	100	49,733	100
Age†
Mean (SD)	72.2	12.0	70.0	13.6	73.4	10.9
< 65	15,175	20.3	7,426	29.6	7,749	15.6
65 – 74	24,950	33.3	7,170	28.5	17,780	35.8
75 – 84	24,163	32.3	7,067	28.1	17,096	34.4
85 +	10,575	14.1	3,467	13.8	7,108	14.3
≥ 65 were SSDIb eligible	10,286	13.7	3,686	14.7	6,600	13.3
Sex†
Female	47,337	63.2	17,652	70.2	29,685	59.7
Male	27,526	36.8	7,478	29.8	20,048	40.3
Race†
White	64,283	85.9	21,938	87.3	42,345	85.1
Black	6,590	8.8	1,941	7.7	4,649	9.4
Hispanic	1,953	2.6	803	3.2	1,150	2.3
Asian	1,071	1.4	142	0.6	929	1.9
Other	966	1.3	306	1.2	660	1.3
Region†
Northeast	12,835	17.1	4,347	17.3	8,488	17.0
North Central	18,390	24.6	6,354	25.3	12,036	24.2
West	10,600	14.2	3,223	12.8	7,377	14.8
South	32,937	44.0	11,206	44.6	21,832	43.9
Low-income subsidy status†
Yes	45,679	61.0	18,471	73.5	27,208	54.7
No	29,184	39.0	6,659	26.5	22,525	45.3
Comorbid medical conditions†
Asthma	21,466	28.7	8,244	32.8	13,222	26.6
Diabetes	26,636	35.6	9,937	39.5	16,699	33.6
Ischemic heart disease	41,481	55.4	14,686	58.4	26,795	53.9
Congestive heart failure	32,772	43.8	12,146	48.3	20,626	41.5
All other cardiovascular disease	51,708	69.1	17,124	68.1	34,584	69.5
Hypertension	60,713	81.1	20,935	83.3	39,778	80.0
Alzheimer's disease and related dementias	14,662	19.6	7,519	29.9	7,143	14.4
Anxiety	14,172	18.9	9,766	38.9	4,406	8.9
COPD severity indicators
Had supplemental oxygen claims	14,699	19.6	4,973	19.8	9,726	19.6
Had any COPD rescue medication†	23,138	30.9	8,736	34.8	14,402	29.0
Hospitalization at baseline†
Had any hospitalization	34,905	46.6	14,683	58.4	20,222	40.7
# of hospitalization (Mean, SD)	2.2	1.8	2.5	2.1	1.9	1.4

SD: standard deviation

^a2006 and/or 2007 depression annual flag in the CCW data

^bSSDI: Social security disability insurance

^†P values < 0.0001 from Chi-square tests for categorical variables or t tests for continuous variables