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Background: Maternal race may be an important risk factor for postpartum readmissions and associated adverse outcomes.Objective: To determine the association of race with serious complications during postpartum readmissions.Study Design: This repeated cross-sectional analysis used the National (Nationwide) Inpatient Sample from the Healthcare Cost and Utilization Project from 2012 to 2014. Women ages 15-54 readmitted postpartum after a delivery hospitalization were identified by Centers for Disease Control and Prevention criteria. Race and ethnicity were characterized as non-Hispanic white, non-Hispanic black, Hispanic, Asian or Pacific islander, Native American, other, and unknown. Overall risk for readmission by race was determined. Risk for severe maternal morbidity during readmissions by race was analyzed. Individual outcomes including pulmonary edema/acute heart failure and stroke also were analyzed by race. Log-linear regression models including demographics, hospital factors, and comorbid risk were used to analyze risk for severe maternal morbidity during postpartum readmissions.Results: Of 11.3 million births, 207,730 (1.8%) women admitted postpartum from 2012 to 2014 were analyzed, including 96,670 white, 47,015 black, and 33,410 Hispanic women. Compared with non-Hispanic white women, non-Hispanic black women were at 80% greater risk of postpartum readmission (95% confidence interval, 79%-82%) whereas Hispanic women were at 11% lower risk of readmission (95% confidence interval, 10%-12%). In unadjusted analysis, compared with non-Hispanic white women, non-Hispanic black women admitted postpartum were at 27% greater risk of severe maternal morbidity (95% confidence interval, 24%-30%) whereas Hispanic women were at 10% lower risk (95% confidence interval, 7%-13%). In the adjusted model, non-Hispanic black women were at 16% greater risk for severe maternal morbidity during readmission than non-Hispanic white women (95% confidence interval, 10%-22%), whereas Hispanic women were at 7% lower risk (95% confidence interval, 1%-12%). Differences in severe maternal morbidity risk between other racial groups and non-Hispanic white women were not significant. In addition to overall morbidity, non-Hispanic black women were at significantly greater risk for eclampsia, acute respiratory distress syndrome, and renal failure than other racial groups (P<.05 all). Black women were at 126% greater risk for pulmonary edema/acute heart failure than white women (95% confidence interval, 117%-136%).Conclusion: Black women were more likely (1) to be readmitted postpartum, (2) to suffer severe maternal morbidity during readmission, and (3) to suffer life threatening complications such as pulmonary edema/acute heart failure. At-risk women including black women with cardiovascular risk factors may benefit from short-term postpartum follow-up. [ABSTRACT FROM AUTHOR]

Objective: The objective of this study was to characterize the risk for severe maternal morbidity and other pregnancy complications by maternal age during delivery hospitalizations.Study Design: This retrospective cohort analysis used the Perspective database to characterize the risk for adverse maternal outcomes from 2006 to 2015 based on maternal age. Women were divided into 7 categories based on maternal age: 15-17, 18-24, 25-29, 30-34, 35-39, 40-44, and 45-54 years of age. The primary outcome of this study was severe maternal morbidity as defined by the Centers for Disease Control and Prevention. Secondary outcomes included (1) overall comorbid risk; (2) risk for pregnancy complications such as postpartum hemorrhage, gestational diabetes, preeclampsia, and cesarean delivery; and (3) risk for individual severe morbidity diagnoses such as stroke, embolism, eclampsia, and hysterectomy. Adjusted models were fitted to assess factors associated with severe morbidity with adjusted risk ratios (aRRs) and 95% confidence intervals (CI) as measures of effect. Population weights were applied to create national estimates.Results: Of 36,944,292 deliveries included, 2.5% occurred among women aged 15-17 years (n = 921,236), 29.1% to women aged 18-24 years (n = 10,732,715), 28.6% to women aged 25-29 years (n = 10,564,850), 24.9% to women aged 30-34 years (n = 9,213,227), 12.1% to women aged 35-39 years (n = 4,479,236), 2.6% to women aged 40-44 years (n = 974,289), and 0.2% to women aged 45-54 years (n = 58,739). In unadjusted analyses, severe morbidity was more than 3 times higher (risk ratio [RR], 3.33, 95% confidence interval [CI], 3.03-3.66) for women 45-54 years compared with women 25-29 years. Women aged 40-44, 35-39, and 15-17 years were also at increased risk (RR, 1.83, 95% CI, 1.77-1.89; RR, 1.36, 95% CI, 1.33-1.39; RR, 1.39, 95% CI, 1.34-1.45, respectively). In the adjusted model, the 45-54 year old group was associated with the highest relative risk (aRR, 3.46, 95% CI, 3.15-3.80) followed by the 40-44 year old group (aRR 1.90, 95% CI, 1.84-1.97), the 35-39 year old group (aRR, 1.43, 95% CI, 1.40-1.47), and the 15-17 year old group (aRR, 1.20, 95% CI, 1.15-1.24). Cesarean delivery, preeclampsia, postpartum hemorrhage, and gestational diabetes were most common among women aged 45-54 years, as were thrombosis and hysterectomy.Conclusion: While differential risk was noted across maternal age categories, women aged 45 years old and older were at highest risk for a broad range of adverse outcomes during delivery hospitalizations. [ABSTRACT FROM AUTHOR]