Table 2. Baseline and Characteristics of Bipolar Disorder Inpatients by Cocaine Use.

n: sample number; SE: Standard error; %: percentage; CU: Cocaine Use

Name	Overall  (n= 266,303)	Non-CU  (n=244,080)	CU  (n=22,223)	P Value
Mean Age (±SE)	41.58 ± 0.11	41.70 ± 0.03	40.33 ± 0.07	<0.001
Age, years
18-24	14.5	15.1	8.2
25-39	32.8	32.4	36.8
40-64	45.2	44.4	54.4
≥ 65	7.5	8.1	0.6	<0.001
Sex, %
Female	56.6	57.6	46.1
Male	43.4	42.4	53.9	<0.001
Race, %
White	72.9	74.5	55.8
Black	14.8	13.3	31.7
Others	12.3	12.2	12.5	<0.001
Substance use disorder
Cannabis Use	15.1	13.4	33.0	<0.001
Stimulant	3.2	2.9	6.7	<0.001
Hallucinogen	0.2	0.2	1.0	<0.001
Alcohol Use	22.3	20.0	46.7	<0.001
Sedative	4.0	3.8	7.1	<0.001
Income, %
First quartile	32.6	31.7	42.8
Second quartile	26.6	26.8	24.1
Third quartile	22.4	22.8	18.8
Fourth quartile	18.3	18.7	14.3	<0.001
Insurance, %
Government	60.3	59.6	67.2
Private	25.1	26.0	15.6
Self- Pay	8.7	8.5	11.0
Others	5.9	5.9	6.2	<0.001
Region, %
North East	22.3	21.9	26.2
Mid-West/North Central	27.7	27.8	27.6
South	36.3	36.2	37.8
West	13.7	14.1	8.4	<0.001
Hospital Teaching Status, %
Rural	10.8	11.2	6.3
Urban non-teaching	40.8	40.9	39.1
Urban teaching	48.4	47.9	54.6	<0.001