Results for all unipolar patients with treatment resistant depression (N = 39), df (1,39).

At baseline (week 1), half-way through treatment (week 5), and upon treatment completion (week 9) and follow-up week 14. Factor time, P* and factor time by treatment group interaction including baseline and week 9 BDNF levels (weeks 1,9) and baseline, week 5, and week 9 BDNF levels (weeks 1-5-9). Covariates for repeated-measures ANCOVA in all analyses: age and gender.BDNF levels ng/l (in brackets, Mean Standard Deviation).