Table 1.

Demographic and clinical characteristics of pediatric bipolar disorder type I (BD I) and type II (BD II), and healthy comparison subjects (HC). Means, standard deviations (SD), percentages, and significance values are presented below.

	Healthy Subjects	BDI	BDII	Analysis
	Mean (SD)	Mean (SD)	Mean (SD)	F(p)
Variables
Age (years)	13.03 (3.29)	12.33 (3.27)	14.42 (2.50)	2.53 (.10)
Socioeconomic statusa	1.94 (0.91)	2.00 (0.96)	2.00 (0.94)	0.77 (.45)
YMRS	1.85 (2.00)	22.89 (8.60)	12.32 (6.71)	84.78 (<.0001)
CDRS-R	19.52 (2.33)	49.89 (15.76)	52.47 (18.66)	56.17 (<.0001)
WASIIQ	108.55 (16.44)	102.67 (18.54)	100.26 (15.23)	1.70 (.19)
	N (%)	N (%)	N (%)	χ2(p)
Sex				2.10 (.35)
Male	19 (58%)	14 (52%)	7 (37%)
Female	14 (42%)	13 (48%)	12 (63%)
Race				2.86 (.24)
Caucasian	17 (52%)	18 (67%)	13 (68%)
Other	16 (48%)	9 (33%)	6 (32%)
Comorbid Diagnoses		N (%)	N (%)
bADHD		15 (56%)	4 (21%)
cGAD		2 (7%)	2 (11%)
dODD		4 (15%)	2 (11%)
eSP		1 (4%)	0

^aRated with Hollingshead Index of Social Position

^bAttention Deficit Hyperactivity Disorder

^cGeneralized Anxiety Disorder

^dOppositional Defiant Disorder

^eSocial Phobia