Table 1. Demographic and clinical characteristics of the subjects.

	OCD (n = 23)	Healthy controls (n = 64)	p-value
Gender, male:female	9: 14	27: 37	0.7981
Age, yrs	37.2 ± 10.7	38.3 ± 12.8	0.7265
Education, yrs	12.8 ± 2.6	15.5 ± 1.8	<0.0001*
Total brain volume, L	1.15 ± 0.11	1.14 ± 0.1	0.4949
Illness duration, yrs	14.3 ± 12.3
Y-BOCS	22.6 ± 6.5

Data are mean ± SD.

*p <0.05. OCD, obsessive-compulsive disorder; Y-BOCS, Yale-Brown Obsessive-Compulsive Scale.