The incidence of mental illness in early motherhood in a population-based survey.

The present study examined the risk of mental disorders within the first 3 postpartum years in a nationally representative sample and the sociodemographic risk factors for mental illness in early motherhood. Women aged 18 to 55 years were asked, "Are you pregnant at this time?" at baseline. A total of 13,839 women answered, with 365 of these women reporting pregnancy. Mental disorders were assessed using the Alcohol Use Disorder and Associated Disabilities Interview Schedule-IV version. After adjusting for sociodemographics, postpartum women were found to be at lower risk than non-postpartum women for having several first onset mental disorders (adjusted odds ratio range: 0.49-0.58). Postpartum women with a history of mental illness were at lower risk for the onset of any mental disorder (adjusted odds ratio: 0.60, 95% confidence interval: 0.39-0.91). No sociodemographic correlates of mental disorders were identified. Clinicians should be aware of these findings when counseling women about mental disorder risk postbirth.