The predictors of delayed remission included unemployment (P = .004), severe medical comorbidity (P < .0001), severe baseline depression (P < .0001), more than 4 dysthymic symptoms (P = .005), more than 9 posttraumatic stress symptoms (P = .005), and serotonin receptor 1A (P = .006) and cytochrome P450 2D6 (P = .002 for C/T and P = .0004 for T/T) genetic variants.