Figure 1.

Difference in serum BDNF among the remission and nonremission groups and healthy controls.

Notes: Data are presented as means ± standard deviation. Differences from healthy controls are indicated (*P<0.05), as analyzed by analysis of variance. Serum BDNF levels of MDD patients with remission during the maintenance phase of treatment were comparable to those of healthy controls. MDD patients without remission had significantly lower serum BDNF than healthy controls.

Abbreviations: BDNF, brain-derived neurotrophic factor; Ham-D, Hamilton Depression Rating Scale; MDD, major depressive disorder.