Table 1.

The summary of demographic and clinical variables.

Variable	Controls (n = 35)	OCD patients (n = 32)	t-/z-stat.	p-value
Age (year)	23.94 ± 3.60	24.81 ± 6.41	0.69	0.49
Gender (men/women)	24/11	21/11	0.15	0.88
Education (year)	14.03 ± 1.29	14.34 ± 3.23	0.53	0.59
IQ	113.20 ± 9.98	111.40 ± 11.32	−0.69	0.49
BDI	4.26 ± 6.17	17.37 ± 10.71	6.21	<10-7
BAI	4.54 ± 5.49	18.72 ± 13.70	5.65	<10-6
Y-BOCS
Obsession	–	11.97 ± 3.49	–	–
Compulsion	–	9.06 ± 4.69	–	–
Total	–	21.03 ± 6.06	–	–

The mean and the standard deviation of the variables are shown except for gender. The IQ was estimated by Korean-Wechsler adult intelligence scale-revised (K-WAIS-R).

Abbreviations

BDI

Beck's depression inventory

BAI

Beck's anxiety inventory

Y-BOCS

Yale-Brown obsessive-compulsive disorder Scale.