Course of a major postpartum depressive episode: A prospective 2 years naturalistic follow-up study

Background Survival methodology has not already been used in studies about postpartum depression (PPD) course. The aims of the present study were to estimate the duration of a Major Postpartum Depressive Episode (MPDE) during 2 years, as well as to explore factors associated with the course. Method This was a prospective, naturalistic, longitudinal study with a cohort of 165 women with a MPDE (DSM-IV criteria). Potential predictors of prognosis were recorded at baseline. Follow-up was conducted using the Longitudinal Interval Follow-up Evaluation (LIFE). Results Of the total sample, 110 (66.7%) completed the 2 years follow-up. The mean time to full remission was 49.4 weeks (95% CI: 44.0–59.8). The probability of recovering was 30.2% (95% CI: 22.1%–37.4%) at 6 months of follow-up, 66.3% (95% CI: 57.4%–73.4%) at 12 months of follow-up, and 90.3% (95% CI: 79.8%–95.4%) at 24 months of follow-up. Mothers with financial difficulties, onset of depressive episode previous to birth, and those with prior treated depressive episodes took longer in achieving full remission. Limitations Results are only generalizable to mothers with PPD treated in a psychiatric outpatient setting. Psychopharmacological treatment was uncontrolled and personality was not assessed. Conclusions Our findings suggest that PPD could become a chronic disorder, particularly in mothers with an onset of the episode previous to birth, with a history of depression or with financial problems. Knowledge of these factors may help to improve the guidelines of depression management and treatment during the perinatal period.