Table 1.

Clinical data of MDD patients and control subjects.

	MDD patients (n = 21)	HCs (n = 25)	p
Age (years)	37.5 ± 11.57	31.4 ± 10.96	0.091 > 0.05
Gender (female/male)	8/13	8/17	0.665 > 0.05
Hand (left/right)	0/21	0/25
Education years	14.71 ± 3.40	16.16 ± 3.91	0.193 > 0.05
HDRS scores	24.38 ± 4.08
Duration (months)	3.47 ± 2.60
HARS scores	24.47 ± 8.38

Data are expressed as mean ± SD.

Unpaired t-test for the continuous variables and Pearson chi-square test for the gender were performed using the Statistical Package for Social Sciences (SPSS) (version 17.0; IBM, Armonk, NY, USA).

MDD, major depressive disorder; HCs, healthy controls; HDRS, Hamilton Depression Rating Scale; HARS, Hamilton Anxiety Rating Scale.