Table 1.

Demographic and Clinical Data of Subjects

	Healthy Controls		MDD Participants
	Male	Female	Male	Female
Number	16	17	13	16
Age (years, mean±S.D.) [range]	31.81±7.05 [18–45]	28.00±9.09 [18–44]	31.23±8.39 [21–45]	28.88±9.71 [18–45]
Education (years, mean±S.D.) [range]	14.50±3.06 [9–19]	13.53±2.83 [9–17]	13.08±2.63 [9–17]	12.01±3.16 [6–16]
HDRS (mean±S.D.) [range]	0.5±1.03 [0–3]	1.12±1.87 [0–4]	27.69±5.12 [24–37]	29.56±5.11 [24–38]
Duration of illness (Month, mean±S.D.) [range]	N/A	N/A	12.1±13.07 [2–48]	13.91±17.65 [0.5–48]

S.D.: standard deviation

MDD: major depressive disorder

HDRS: Hamilton Depression Rating Scale