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. 2022 Oct 21;192(2):158–170. doi: 10.1093/aje/kwac183

Figure 2.

Figure 2

Adjusted risk ratios (aRRs) for postpartum readmissions with evidence of severe maternal morbidity (SMM) (A) and postpartum readmissions without evidence of SMM (B) among Oregon hospital births (n = 158,653), 2012–2017. The reference category for maternal age was 25–29 years. The model for maternal residential location (MRL) adjusted for maternal age; the reference location was urban. The model for type of health insurance at delivery adjusted for maternal age, MRL, any substance use disorder (SUD), and any mental health (MH) diagnosis; the reference category was commercial insurance. The model for mode of delivery adjusted for maternal age, MRL, insurance type at delivery, any SUD, any MH diagnosis, any diabetes, and any hypertensive disorders of pregnancy (HDP); the reference category was vaginal delivery. The model for extended length of stay adjusted for maternal age, MRL, insurance type at delivery, any SUD, any MH diagnosis, any diabetes, HDP, and mode of delivery; the reference category was no. The model for SMM at delivery adjusted for maternal age, MRL, insurance type at delivery, any diabetes, and HDP; the reference category for this and all following categories was no evidence. The model for prepregnancy diabetes/gestational diabetes adjusted for maternal age, MRL, any SUD, and any MH diagnosis; the model for HDP adjusted for maternal age, MRL, any SUD, and any MH diagnosis; the model for SUD adjusted for maternal age, MRL, and any MH diagnosis; and the model for MH diagnoses adjusted for maternal age and MRL. Bars, 95% confidence intervals (CIs).