Trends in Pregnancy Outcomes in People with Sickle Cell Disease and Medicaid Insurance (2006-2018).

Background: Although the risk of pregnancy-related morbidity and mortality in people with sickle cell disease (SCD) is well established, limitations in data sources and heterogeneity in outcome reporting hinder the ability to make meaningful comparisons between historical and contemporary populations. This study used a national administrative claims database to compare pregnancy outcomes in people with SCD between 2006-2011 and 2012-2018. Materials and Methods: Pregnant females aged 16-44 years with SCD were identified from the Centers for Medicare and Medicaid Service Analytic eXtract, along with a control cohort of pregnant people. People were followed from first identified pregnancy until one year postpartum. Outcomes of interest were identified with ICD-9 or 10 codes. Results: We included 6,388 people with SCD and 17,278 controls in analyses. Preeclampsia/eclampsia, hypertension, thrombosis, poor fetal growth, preterm delivery, and postpartum hemorrhage were all more common in people with SCD compared with controls. Maternal death occurred in 0.5% of people with SCD versus <0.1% in those without SCD (p < 0.001). When comparing infant deliveries in 2006-2011 to those occurring in 2012-2018, all pregnancy-related complications except preterm delivery, including maternal death, occurred at similar or higher frequencies in more recent years. Conclusions: Between 2006 and 2018, maternal death occurred in approximately 1 out of every 200 publicly insured people with SCD in the year following infant delivery. Our work confirms, on a national-level, that pregnancy-related outcomes in people with SCD in the United States have not improved with time, and that some complications have in fact increased in frequency.