Table 1.

Baseline Prevalence of Unipolar and Bipolar Depression and History of Attempted Suicide According to the Level of Other Baseline Factors

		Depression			Attempted Suicide
Factor	No. of Subjectsa	Prevalence, % (n = 538)		P Valueb	Prevalence, % (n = 419)		P Valueb
Overall	7641	7.04			5.48
Age, y
<30	4472	6.35		.01	5.64		.49
30–39	3169	8.02			5.27
Sex
Male	3479	4.50		<.001	3.16		<.001
Female	4162	9.20			7.42
Race/ethnicity
White	2182	9.43		<.001	5.96		.39
Black	2530	6.01			4.90
Hispanic	2610	6.25			5.56
Other	319	5.33			6.27
<High school educational level	2698	6.45		.13	7.15		<.001
Economic status below poverty levelc	2053	7.89		.08	7.50		<.001
Health behaviors
Sedentary lifestyle	1286	7.93		.17	7.08		.01
Never smoker	4506	5.70		<.001	3.86		<.001
Past smoker	892	8.62			6.05
Current smoker	2242	9.10			8.52
History of cocaine use	297	11.11		.01	13.47		<.001
History of binge drinking	2624	8.46		.07	5.68		.53
BMI
Normal weight	3875	6.97		.01	5.11		.052
Overweight	2172	6.45			5.39
Obese	940	6.60			5.74
Morbidly obese	643	10.09			7.78

Abbreviation: BMI, body mass index.

^aThe following categories may include fewer than 7641 individuals because of missing data (n missing): educational level (46), economic status (646), smoking behavior (1), sedentary behavior (35), cocaine use (7), and BMI (11).

^bCalculated as χ² test comparing depression prevalence in those with and without the characteristic.

^cBased on a poverty to income ratio of less than 1.