Table 1 Clinical study demographic and baseline clinical information

Gender (Male: Female)

13:16

7:9

X ² = 0.11, p = 0.74

Age (s.d.)

42.5 (15.0)

46.3 (12.7)

t = 0.85, p = 0.40

Years of education (s.d.)

13.9 (4.2)

14.1 (3.2)

t = 0.16, p = 0.87

Duration of illness in months (s.d.)

11.1 (9.7)

13.6 (11.4)

t = 0.79, p = 0.44

Hamilton score (s.d.)

21.3 (4.0)

19.4 (4.1)

t = 1.55, p = 0.13

Antidepressants (SSRI / other)

28 /3

15 /0

X ² = 1.55, p = 0.21

Alpha EEG frequency (s.d.)

9.7 (0.9)

9.3 (1.1)

t = 1.39, p = 0.17