• Morey A Blinder, Mei Sheng Duh, Medha Sasane, Alex Trahey, Carole Paley, and Francis Vekeman.
• Department of Medicine and Department of Pathology & Immunology, Washington University St. Louis, St. Louis, Missouri.
• J Emerg Med. 2015 Oct 1; 49 (4): 513-522.e1.

BackgroundEmergency Department Reliance (EDR: total emergency department [ED] visits/total ambulatory [outpatient + ED] visits) differentiates acute episodic ED users from those who may not have adequate access to outpatient care.ObjectiveThis study's aim was to investigate age-related patterns of EDR and associated health-care costs in pediatric patients with sickle cell disease (SCD) and those transitioning from pediatric to adult care.MethodsState Medicaid data were used for this study. Patients with two or more SCD diagnoses and one or more blood transfusion were included. Quarterly rates of ED visits, EDR, SCD complications associated with ED visits, and ED visits resulting in hospitalization were evaluated. Risk factors associated with high EDR and the association between high EDR and health-care costs were explored through regression analyses.ResultsA total of 3208 patients were included. The most common SCD complications associated with ED visits were pain, infection, and pneumonia. Beginning at the age of 15 years, EDR rose from 0.17 to 0.29 visits per quarter at age 22 years, and remained high throughout adulthood. Regression analyses indicated that patients were most likely to have high EDR during the post-transition period and when experiencing an SCD complication. Patients with high EDR incurred statistically significantly higher inpatient and ED costs, resulting in significantly higher total health-care costs.ConclusionsCompared to children, patients transitioning to adulthood relied more on the ED for their care. In addition, patients with high EDR incurred more days in the hospital and significantly higher health-care costs, highlighting the need to improve transition-related support, including better access to primary care and increased engagement with patients with SCD.Copyright © 2015 Elsevier Inc. All rights reserved.

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