Table 1.

Weight categories and demographic variables among adults with bipolar disorder, major depressive disorder (MDD), and controls

	Bipolar disorder (n = 1,905)	MDDa (n = 5,695)	Controls (n = 35,493)	χ2 or F	df	p-value
Weight
Normal (BMI < 25)	39.12	41.91	42.19	15.93	6	< 0.0001
Overweight (BMI 25.0–29.9)	32.02	29.78	36.62
Obese (BMI 30.0–39.9)	23.66	24.12	18.92
Extremely obese (BMI 40+)	5.20	4.19	2.27
Age, mean (SE)	37.15 (0.41)	43.97 (0.26)	45.87 (0.21)	195.88	2	< 0.0001
Female	55.15	67.34	49.46	83.79	2	< 0.0001
Caucasian	71.12	78.13	69.72	21.21	2	< 0.0001
Married	48.79	56.23	63.18	44.82	2	< 0.0001
Completed high school or greater	81.56	86.61	84.14	10.97	2	0.0001
Currently employed	62.39	66.00	64.95	2.54	2	0.0866
Personal income
$0–19,999	60.07	50.09	46.11	15.48	6	< 0.0001
$20,000–34,999	21.43	22.57	22.73
$35,000–69,999	15.11	20.41	22.57
$70,000+	3.39	6.93	8.59
Anxiety disordersb	51.64	37.62	8.53	96.15	2	< 0.0001
Alcohol abuse or dependence	56.99	40.33	27.23	63.25	2	< 0.0001
Drug abuse or dependence	34.85	17.21	7.90	66.58	2	< 0.0001
Daily cigarette smoker	50.20	43.53	34.46	48.50	2	< 0.0001

Values indicated as percent except where noted otherwise. BMI = body mass index.

^aThe MDD sample excluded those patients with a history of mixed, manic, or hypomanic episodes.

^bGeneralized anxiety disorder, panic disorder, and/or social anxiety disorder.