title: Rising use of CT in child visits to the emergency department in the United States, 1995-2008.
abstract: OBJECTIVE
  To describe nationwide trends and factors associated with the use of computed tomography (CT) in children visiting emergency departments (EDs) in the United States between 1995 and 2008.
  
  
  METHODS
  This study was exempt from institutional review board oversight. Data from the 1995-2008 National Hospital Ambulatory Medical Care Survey were used to evaluate the number and percentage of visits associated with CT for patients younger than 18 years. A mean of 7375 visits were sampled each year. Data were subcategorized according to multiple patient and hospital characteristics. The Rao-Scott χ(2) test was performed to determine whether CT use was similar across subpopulations.
  
  
  RESULTS
  From 1995 to 2008, the number of pediatric ED visits that included CT examination increased from 0.33 to 1.65 million, a fivefold increase, with a compound annual growth rate of 13.2%. The percentage of visits associated with CT increased from 1.2% to 5.9%, a 4.8-fold increase, with a compound annual growth rate of 12.8%. The number of visits associated with CT at pediatric-focused and non-pediatric-focused EDs increased from 14,895 and 316,133, respectively, in 1995 to 212,716 and 1,438,413, respectively, in 2008. By the end of the study period, top chief complaints among those undergoing CT included head injury, abdominal pain, and headache.
  
  
  CONCLUSIONS
  Use of CT in children who visit the ED has increased substantially and occurs primarily at non-pediatric-focused facilities. This underscores the need for special attention to this vulnerable population to ensure that imaging is appropriately ordered, performed, and interpreted.
authors.affiliation: Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave, MLC 5031, Cincinnati, OH 45229, USA. david.larson@cchmc.org
authors.forename: David B
authors.initials: DB
authors.lastname: Larson
authors.forename: Lara W
authors.initials: LW
authors.lastname: Johnson
authors.forename: Beverly M
authors.initials: BM
authors.lastname: Schnell
authors.forename: Marilyn J
authors.initials: MJ
authors.lastname: Goske
authors.forename: Shelia R
authors.initials: SR
authors.lastname: Salisbury
authors.forename: Howard P
authors.initials: HP
authors.lastname: Forman
mesh_terms: D000293:Adolescent; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data*; D005260:Female; D019538:Health Care Surveys; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D014481:United States