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Maternal morbidity presents a growing challenge to the American healthcare system and increasing numbers of patients are requiring higher levels of care in pregnancy. Identifying patients at high risk for critical care interventions, including intensive care unit admission, during delivery hospitalizations may facilitate appropriate multidisciplinary planning and lead to improved maternal safety. Baseline risk factors for critical care in pregnancy have not been well-described previously. This study assesses baseline factors associated with critical care interventions that were present at admission for delivery. This is a secondary analysis of a multicenter observational registry of pregnancy after prior uterine surgery and primary cesarean delivery. All women with known gestational age were included. The primary outcome measure was a composite of critical care interventions that included postpartum intensive care unit admission, mechanical ventilation, central intravenous access, and arterial line placement. Risk for this critical care outcome measure was compared by selected baseline and obstetric characteristics known at the time of hospital admission, including maternal age, pre-pregnancy BMI, race, maternal co-morbidities, parity, and plurality. We evaluated these potential predictors and fit a multivariable logistic regression model to ascertain the most significant risk factors for critical care during a delivery hospitalization. 73,096 of 73,257 women in the parent trial met inclusion criteria, of whom 505 underwent a critical care intervention (0.7%). In the adjusted model, heart disease [aOR = 10.05, CI = 6.97 − 14.49], renal disease [aOR = 2.78, CI = 1.49 − 5.18], and connective tissue disease [aOR = 3.27, CI = 1.52 − 6.99], as well as hypertensive disorders of pregnancy [aOR = 2.04, CI = 1.31 − 3.17] were associated with the greatest odds of critical care intervention [ p  &lt; .01] (Table 2). Other predictors associated with increased risk included maternal age, African American race, smoking, diabetes, asthma, anemia, nulliparity, and twin pregnancy. In this cohort, women with cardiac disease, renal disease, connective tissue disease and preeclampsia spectrum disorders were at increased risk for critical care interventions. Obstetric providers should assess patient risk routinely, ensure appropriate maternal level of care, and create multidisciplinary plans to improve maternal safety and reduce risk.

An assessment of baseline risk factors for peripartum maternal critical care interventions