Severe Maternal Morbidity Associated with Hypertensive Disorders in Pregnancy in the United States

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Abstract
Objectives: This study was to report the incidence of severe maternal morbidity associated with hypertensive disorders of pregnancy in the United States. Study Design: We used data from the National Hospital Discharge Survey, a nationally representative sample of discharge records, from 1988 to 1997. The database consisted of approximately 300,000 deliveries, which represented 39 million births during the 10‐year period. Results: The overall incidence of hypertensive disorders in pregnancy was 5.9% [95% confidence interval (CI): 5.2 to 6.5%]. Eclampsia was reported at 1.0 per 1000 deliveries (95% CI: 0.8 to 1.2). The incidence of eclampsia, severe preeclampsia, and superimposed preeclampsia remained unchanged during the 10‐year period. Women with preeclampsia and eclampsia had a 3‐ to 25‐fold increased risk of severe complications, such as abruptio placentae, thrombocytopenia, disseminated intravascular coagulation, pulmonary edema, and aspiration pneumonia. More than half of women with preeclampsia and e...

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