• Henry C Lee, Naomi S Bardach, Judith H Maselli, and Ralph Gonzales.
• From the *Department of Pediatrics, Stanford University, Stanford; and †Department of Pediatrics, ‡Division of General Internal Medicine, Department of Medicine, and §Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA.
• Pediatr Emerg Care. 2014 May 1; 30 (5): 315-8.

ObjectivesThis study aimed to estimate the incidence of emergency department (ED) visits in the neonatal period in a nationally representative sample and to examine variation by race.MethodsThe National Hospital Ambulatory Medical Care Survey is a nationally representative survey of utilization of ambulatory care services including EDs. We studied all ED visits for patients who were younger than 28 days old from 2003 to 2008. Using the national birth certificate data, we calculated the visit rates by race. Emergency department visits were also characterized by age, insurance status, diagnosis category, region, and hospital type (safety-net vs non-safety-net hospitals).ResultsThere was an average of 320,540 neonatal ED visits in the United States per year, with an estimated 7.6% of births visiting the ED within 28 days. Estimated rates of ED visits were highest among non-Hispanic blacks, with 14.4% (95% confidence interval [CI], 10.0-19.2) of newborns having an ED visit in the neonatal period, compared with 6.7% (95% CI, 4.9-7.2) for whites and 7.7% (95% CI, 5.7-9.8) for Hispanics. Hispanic and black neonates were more likely to be seen in safety-net hospitals (75.8%-78.2%) than white (57.1%) patients (P = 0.004).ConclusionsIn this first nationally representative study of neonatal visits to the ED, visits were common, with the highest rates in non-Hispanic blacks. Hispanic and black neonates were more commonly seen in safety-net hospitals. Reasons for high visit rates deserve further study to determine whether hospital discharge practices and/or access to primary care are contributing factors.

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