Table 1.

Clinical characteristics at baseline (N=41)

	MDD (N=20)	HC (N=21)	t or χ2	p value
Age (mean, SD)	42.25±13.65	42.33±10.24	0.031	0.982
Education level				0.003*
Elementary and middle school	11	2	11.797
High school or college/university	7	9
Above graduate school	2	10
Family history of MDD (yes/no)	5/15	0/30	5.979	0.021*
HAM-D (mean, SD)	21.72±8.67	0.95±1.23	10.074	<0.0001*
Onset of MDE (age, years, mean, SD)	31.68±13.10	-
Duration of MDE (months, mean, SD)	114.22±135.45	-
Number of MDE (mean, SD)	7.12±9.12	-
Number of suicide attempts (mean, SD)	0.56±0.71	-

^*p<0.05.

MDD: major depressive disorder, HC: healthy controls, MDE: major depressive episode, HAM-D: Hamilton depression rating scale