Maternal Depressive Symptoms and Risk for Childhood Depression: Role of Executive Functions.

OBJECTIVE Offspring of mothers with depression are at increased risk for executive function (EF) deficits and later depressive symptoms, but limited studies examined EF as an intermediary pathway. This study examined the role of EF in mediating the association between maternal and child depressive symptoms. METHOD Data were from a longitudinal birth cohort consisting of 739 participants followed from the antenatal period for 12 years. Mothers completed the Edinburgh Perinatal Depression Scale at 26-28 weeks' gestation, at 3 months, and 24 months postpartum. At 8.5-10 years, children self-reported the Children's Depression Inventory-2. Task-based and parent-reported EF measures were collected at four timepoints between 3.5 and 8.5 years. Latent growth curve models examined antenatal depressive symptoms and its trajectory in contributing to cold (i.e., cognitive) and hot (i.e., affective) EF. We then assessed the extent to which EF mediated this association. RESULTS Maternal depressive symptoms did not directly predict depressive symptoms in late childhood. Antenatal depressive symptoms predicted lower cold (ß = -0.13, 95% CI= -0.25, -0.004) and hot EF (ß = -0.26, 95% CI= -0.38, -0.15). Deficits in cold EF (ß = -0.26, 95% CI = -0.41, -0.11) acted as an intermediary path to depressive symptoms, while hot EF mediated the association between maternal and child depressive symptoms, forming an indirect path that accounted for 37.5% of the association. CONCLUSION Deficits in hot EF may be a pathway in explaining the intergenerational transmission of depression. The finding suggests fostering EF skills as a potential strategy for at-risk children.