Background:
Gender differences exist in psychiatric disorders; however gender has not been well studied in psychotic depression. This analysis of the largest clinical trial in psychotic depression examined the effects of age and gender on clinical characteristics and predictors of treatment outcome and treatment-associated changes in body mass index (BMI) and metabolic measures.
Methods:
Analyses were performed on data from 259 subjects aged 18-93 in the double-blind randomized controlled trial of olanzapine plus sertraline (OLZ/SERT) vs. olanzapine plus placebo (OLZ/PBO) for psychotic depression (STOP-PD). Sociodemographic factors, clinical characteristics, treatment outcome and treatment-associated changes in BMI and metabolic measures were analyzed by gender and age.
Results:
Female gender was associated with divorced (χ2=5.3, d.f.=1, p=0.03) or widowed (χ2=8.1, d.f.=1, p=<0.01) marital status. Co-morbid anxiety disorders were more common in females than males (χ2=4.9, d.f.=1, p=0.03). Hallucinations(χ2=7.8, d.f.=1, p=0.005) and delusions with disorganization (t-test= −2.10, d.f. =257, p=0.04) were significantly associated with female gender as were higher cholesterol measures( χ2=7.15, d.f.=1, p=0.008).There were no significant interactions between treatment and gender in terms of change in BMI. Gender was not associated with treatment response.
Discussion:
This is the first analysis of gender and age as predictors of treatment outcome and treatment-associated changes in BMI and metabolic adverse effects in psychotic depression. Gender differences exist in patients with psychotic depression, most notably the presence of hallucinations. Female gender was associated with metabolic measures. Future studies with larger sample sizes may detect small gender differences in treatment outcome and treatment-associated changes in BMI and metabolic measures in psychotic depression.