Relationships between early-life family poverty and relative socioeconomic status with gestational diabetes, preeclampsia, and hypertensive disorders of pregnancy later in life.

Purpose: Low early-life absolute and relative socioeconomic status (SES) may contribute to socioeconomic disparities in pregnancy complications (i.e., gestational diabetes mellitus [GDM], preeclampsia/eclampsia [PE], hypertensive disorders of pregnancy [HDP; preeclampsia/eclampsia, gestational hypertension, chronic hypertension]), but their independent associations with pregnancy complications have not been studied. This study investigated associations of early-life poverty and relative SES with risks of GDM, PE, and HDP.

Methods: National Longitudinal Study of Adolescent to Adult Health data were used (GDM n = 802; PE n = 813; HDP n = 801). Objective poverty was defined as wave I low-income or receipt of federal nutrition assistance benefits. Relative SES was self-reported at wave V (ages 33-39) by asking whether the participant's family was financially worse off than average when growing up. Logistic regressions assessed relationships between poverty, relative SES, and self-reported lifetime diagnoses of GDM, PE, or HDP.

Results: Lifetime prevalences of GDM, PE, and HDP were 9.23%, 12.00%, and 21.93%, respectively. Low relative SES (odds ratio: 2.04 [1.07, 3.89]) and poverty (odds ratio: 1.81 [0.97, 3.38]) were independently associated with GDM but not with PE or HDP.

Conclusions: Early-life poverty and relative SES are associated with GDM; understanding the mechanisms underlying these associations may help identify novel intervention targets to reduce socioeconomic disparities in GDM.