Table 1.

Demographic and clinical characteristics of MDD patients and CN.

	MDD	CN	t/χ2	P
Sample size	26	25	–	–
Age (mean ± standard deviation)	38.69 ± 12.54	34.76 ± 6.25	t = 1.430	0.162
Gender (male/female)	7/19	10/15	χ2 = 0.981	0.244
Education level (high school or below/university or above)	8/18	4/21	χ2 = 1.545	0.324
Disease duration (months)	35.35 ± 41.32	–	–	–
Duration of untreated psychosis (months)	5.21 ± 5.39	–	–	–
HAMD total	27.65 ± 8.38	0.44 ± 0.92
Anxiety/somatization	5.04 ± 2.34	0.12 ± 0.60
Weight loss	0.46 ± 0.65	0
Cognitive disturbance	4.46 ± 3.08	0.04 ± 0.20
Diurnal variation	0.23 ± 0.43	0
Retardation	7.88 ± 2.36	0.20 ± 0.41
Sleep disturbance	4.19 ± 1.72	0.08 ± 0.28
Hopelessness	5.38 ± 2.27	0

MDD, Major depressive disorder; CN, Healthy controls; -, Not applicable.