Commonly occurring adverse birth outcomes and maternal depression: a longitudinal study.

OBJECTIVES

Little is known about whether commonly occurring adverse birth outcomes have a long-term impact on the mental health of mothers. The aim of this study was to investigate whether commonly occurring adverse birth outcomes predicted mothers' depressive-symptom trajectories over a 27-year period following the birth of a baby.

STUDY DESIGN

Longitudinal study.

METHODS

Participants comprised a sub-group of women from the longitudinal cohort of the Mater and University of Queensland Study of Pregnancy. Maternal depression was measured at six time points from the first clinic visit of an index pregnancy to 27 years after birth. A semi-parametric mixture model was used to identify three symptom trajectories of low-stable, moderate-stable and moderate-rising depression. Multinomial logistic regression was then used to determine whether a number of commonly occurring birth outcomes predicted moderate-stable and/or moderate-rising depression trajectories over the subsequent 27 years. Sociodemographic and behavioural factors were used to adjust for possible confounding.

RESULTS

After adjustment for potential confounders, none of the adverse birth outcomes predicted subsequent maternal depression trajectories. Teenage pregnancy, not completing high school, low family income, obesity, poorer quality partnership and not exercising, measured at women's first clinic visit, and small social networks at three to five days after birth, were significantly associated with women's moderate-rising depressive-symptoms trajectory over 27 years.

CONCLUSIONS

Commonly occurring adverse birth outcomes do not predict long-term depressive trajectories. A number of sociodemographic and behavioural factors present at the index pregnancy predict women's long-term pattern of depression throughout their reproductive life course.