Table 1.

Demographical information of the Major Depressive Disorder (MDD) and healthy controls (HC) groups.

Parameter	MDD (n = 30)	HC (n = 30)	p-value (two-tailed)
Gender	12 M/18F	12 M/18F	1.00 a
Age (years old)	26.7 ± 5.9	26.3 ± 5.6	0.82b
Educational level (years)	13.9 ± 3.5	13.9 ± 2.4	0.98b
Onset age (years old)	24.5 ± 6.5	N/A
Duration time (years)	2.23 ± 2.6	N/A
HDRS	31.6 ± 7.3	N/A

^aχ²-test. ^btwo-sample t-tests.

Abbreviations: HDRS, Hamilton Depression Rating Scale; MDD, Major Depressive disorder; HC, healthy controls; N/A, non-applicable; M, male; F, female.