Objectives: Black and Latinx women have higher rates of trial of labor after cesarean (TOLAC) compared with White women, but lower rates of vaginal birth after cesarean (VBAC). This study examined potential racial/ethnic differences in correlates of TOLAC and VBAC. Materials and Methods: The analytic sample includes term, singleton hospital births to women with one prior cesarean in birth certificate data for 2016. We estimated associations between medical factors (diabetes, hypertension, and prepregnancy obesity) and socioeconomic status (education level and insurance type) and TOLAC and VBAC using logistic regression, stratifying by race/ethnicity and testing whether coefficients differed across models. Results: Hypertension and obesity were more strongly related to reduced chances of TOLAC among White women than among women of color. For example, having a body mass index (BMI) between 30 and 39 (vs. normal BMI) was associated with a 6.3 percentage-point (pp) lower probability of TOLAC for White women, a 5.9 pp lower probability for Black women, and 2.9 pp lower probability for Latinx women. Paying out-of-pocket for birth was associated with a 5.5 pp increase in the probability of TOLAC among White women, versus a 3.2 pp decrease among Black women. Overweight and obesity were associated with lower probability of VBAC, but the magnitude of this association was smaller for Black and Latinx women than for White women. Conclusions: More research is needed to elucidate the underlying decision-making processes that lead to these associations. Future work should focus on ensuring equity in access to VBAC-supportive providers and hospitals and fostering informed decision-making after a prior cesarean.
Keywords: race/ethnicity; trial of labor after cesarean; vaginal birth after cesarean.