Table 1.

Sample characteristics

Characteristic	MDD (n = 57)	Healthy controls (n = 47)	p value
Sex, M/F	30/27	22/25	0.69*
Age, yr	34.68 ± 12.08	37.38 ± 7.95	0.19
Education, yr	14.75 ± 2.42	15.00 ± 2.35	0.75
Time between scans, yr	2.24 ± 0.26	2.26 ± 0.26	0.37

F = female; M = male; MDD = major depressive disorder.

Values are mean ± standard deviation unless otherwise indicated.

^*χ² test.