. Author manuscript; available in PMC: 2011 Jan 10.

Published in final edited form as: Brain Imaging Behav. 2009 Dec 12;4(1):35–45. doi: 10.1007/s11682-009-9083-2

Table 1.

Demographic characteristics. Controls vs. OCD

	Controls (n=33)	OCD (n=32)	OCD early onset (n=17)	OCD late onset (n=15)
Characteristic	Mean (SD) Range	Mean (SD) Range	Mean (SD) Range	Mean (SD) Range
Age	35.21 (10.71) 22–56	38.59 (10.83) 18–60	36.29 (9.97) 18–54	41.20 (11.50) 25–60
Education	16.80^a (2.52) 13–20^*	14.70^a (1.92) 12–19^*	14.82 (2.22) 12–19	14.54^b (1.51) 12–17
	n (%)	n (%)	n (%)	n (%)
Sex
Males	11 (33)	14 (47)	8 (47)	9 (60)
Females	22 (67)	17 (53)	9 (53)	6 (40)
Race
White	27 (82)	30 (94)	16 (94)	14 (93)
Black	2 (6)	1 (3)	1 (6)	0 (0)
Hispanic	1 (3)	0 (0)	0 (0)	0 (0)
Asian	3 (9)	1 (3)	0 (0)	1 (7)
Handedness
Left	4^a (13)	2 (6)	0 (0)	13 (87)
Right	26^a (87)	30 (94)	17 (100)	2 (13)

n=30

n=13

significant difference, p<.01