The association between a medical history of depression and gestational diabetes in a large multi-ethnic cohort in the United States.

Background: Both major depression and gestational diabetes mellitus (GDM) are prevalent among women of reproductive age. Our objective was to determine whether a medical history of depression is related to subsequent development of GDM.

Methods: The Consortium on Safe Labor was a US retrospective cohort study of 228,562 births between 2002 and 2008. Exclusion criteria for the present analysis included multiple gestation pregnancies (n = 5059), pre-existing diabetes (n = 12,771), deliveries <24 weeks (n = 395), site GDM prevalence (<1%) (n = 20, 721) and missing data on pre-pregnancy body mass index (BMI) (n = 61,321). Using generalised estimating equations, we estimated the association between a history of depression and a pregnancy complicated by GDM.

Results: The final analytic population included 121, 260 women contributing 128 295 pregnancies, of which 5606 were affected by GDM. A history of depression was significantly associated with an increased risk of developing GDM (multivariate odds ratio [aOR] = 1.42 [95% confidence interval (CI) 1.26, 1.60]). Adjusting for pre-pregnancy BMI and weight gain during pregnancy attenuated the association, although it remained statistically significant (aOR = 1.17 [95% CI 1.03, 1.33]).

Conclusions: A history of depression was significantly associated with an increased GDM risk among a large multi-ethnic US cohort of women. If the association is confirmed, depression presents a potentially modifiable risk factor of GDM and provides additional clues to the underlying pathophysiology of GDM.