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The purpose of this study to evaluate the risk of Cushing’s syndrome (CS) and maternal and fetal complications using the American Nationwide Inpatient Sample database. This is a retrospective study using the Health Care Cost and Utilization Project-Nationwide Inpatient Sample database from 2004 to 2014. We compared pregnancies with CS versus non-CS regarding pregnancy, delivery, and neonatal outcomes using multivariate logistic regression. We identified 9,096,788 pregnancies during the study period. Cushing’s syndrome complicated 135 pregnancies at a rate of 1–2 cases per 100,000 births. Cushing’s syndrome subjects were more likely to be older, obese, have private insurance, chronic hypertension, and pre-gestational diabetes ( p &lt;.001). The maternal mortality rate was 0.7 and 0.007% in Cushing’s syndrome and control groups, respectively, although due to small numbers of cases, this should be interpreted with caution. Preeclampsia was higher in CS compared to controls after controlling for confounding variables, aOR 2.20. Operative vaginal delivery and blood transfusion rates were higher in CS patients than controls after controlling for confounding factors, aOR 6.49 and 3.09, respectively. The rates of preterm delivery (8.9 versus 7.2%) and gestational diabetes (8.1 versus 5.8%) were not statistically different between CS and control groups. Cushing’s syndrome patients begin pregnancies often with maladies making them more at risk for complications including, preeclampsia, blood transfusion, and operative vaginal delivery. These patients might benefit from prevention methods for preeclampsia, and increased surveillance to decrease maternal morbidity and mortality. However, the nature of the database and its limitations, including the lack of information about CS activity and treatments received by patients, warrant careful interpretation of these results.

The effect of Cushing's syndrome on pregnancy complication rates: analysis of more than 9 million deliveries