Table 1.

Sample characteristics (n = 26)

Variable	Treatment group	Control group
Sample size
Mean (s.d.)	21.15 (23.19)	21.31 (24.00)
% reporting	100.0	100.0
Age, years
Mean (s.d.)	40.95 (6.65)	40.78 (6.54)
% reporting	96.2	96.2
Male, %
Mean (s.d.)	65.52 (15.74)	70.93 (16.55)
% reporting	84.6	84.6
White, %
Mean (s.d.)	48.06 (16.58)	53.53 (29.25)
% reporting	46.2	46.2
Smokers, %
Mean (s.d.)	54.13 (24.69)	56.37 (26.29)
% reporting	38.5	34.6
Education, years
Mean (s.d.)	11.30 (1.58)	11.18 (1.82)
% reporting	53.9	53.9
Illness duration, months
Mean (s.d.)	79.67 (96.37)	80.74 (96.26)
% reporting	69.2	69.2
Age at onset, years
Mean (s.d.)	20.74 (6.93)	21.68 (7.48)
% reporting	34.6	34.6
Clinical Global Impression score
Mean (s.d.)	3.56 (0.56)	3.65 (0.49)
% reporting	26.9	26.9