How Do Undiagnosed Symptoms of Maternal Psychological Distress During the Postnatal Period Affect Child Developmental Outcomes?

Objectives: Evidence suggests that maternal psychological distress is an under-diagnosed condition that can have lasting impacts on child outcomes. Models based solely on maternal outcomes have not found screening to be cost-effective. This research explores the effects of self-reported maternal psychological distress on children's language and behavioural development up to the age of 7.
Methods: Using longitudinal survey data from 10,893 families in the UK Millennium Cohort Study, multilevel models are used to explore the differential effects of maternal diagnosed and treated depression versus untreated maternal psychological distress during the postnatal year on longer-term child outcomes.
Results: Both diagnosed and treated depression and self-reported maternal psychological distress have detrimental effects on child behavioural development. Behavioural outcomes up to age 5 were better for children of women who received treatment for depression, compared with children those whose mothers' psychological distress was untreated, but this was not maintained to age 7. Little or no evidence of a difference was found between maternal psychological distress and child language development.
Conclusions for Practice: This research highlights the lack of effectiveness of existing treatment for maternal psychological distress both to benefit child development and to provide long-term symptom remediation for women. Future research could aim to identify more effective treatments for both women and children.