Changes in the Relationship Between Socioeconomic Position and Maternal Depressive Symptoms: Results from the Panel Study on Korean Children (PSKC).

Maternal depression is a common health problem during the perinatal period. The purpose of this study was to examine changes in the relationship between socioeconomic position and maternal depressive symptoms from prenatal to 3 years postpartum in Korean women. Prospective cohort data were collected from the Panel Study on Korean Children between 2008 and 2011. Maternal depression was assessed using the Kessler 6-Item Psychological Distress Scale. Socioeconomic position indicators used were maternal education, paternal education, maternal occupation, paternal occupation, and household income. Repeated-measures analyses with a generalized estimating equation approach were used to investigate relationships between socioeconomic position and maternal depressive symptoms during the study period. Low socioeconomic position was associated with greater levels of maternal depressive symptoms between 4 months after childbirth and 3 years postpartum, but the association was not evident between 1 month before and after childbirth. The magnitude of the significant association between socioeconomic position and maternal depression was the greatest at 1 year postpartum but then became smaller. Among the five socioeconomic position indicators included, maternal education, paternal education, and household income showed graded inverse relationships with maternal depressive symptoms, while no significant relationship was found for paternal occupation over the study period. Socioeconomic inequalities in maternal depressive symptoms emerged in early childhood in a prospective study of Korean mothers. These emerging inequalities may contribute to socioeconomic inequalities in childhood health and development.