TABLE 1

Hospital-Level Rates of Cross-sectional Imaging Among Age- and Gender-Stratified Pediatric Patients Undergoing an Appendectomy After Presenting to the ED Across a Sample of 40 Pediatric Hospitals in the United States, 2005–2009

CTUltrasound Both CT and UltrasoundEither CT or UltrasoundNegative Appendectomy
Boys
 <5 y35.4 [8.5, 47.0]17.7 [2.4, 34.7]2.1 [0, 5.2]52.8 [39.8, 65.4]16.8 [12.3, 26.8]
 5–10 y29.7 [12.1, 44.5]5.1 [1.2, 24.2]1.4 [0.3, 2.9]44.9 [30.6, 55.4]1.1 [0.4, 2.2]
 >10 y33.2 [16.2, 44.9]4.4 [1.0, 20.1]0.8 [0.3, 3.3]43.5 [35.2, 53.0]0.8 [0.2, 1.7]
Girls
 <5 y40.3 [16.2, 49.6]15.0 [6.4, 35.7]3.0 [0.0, 6.6]59.7 [44.7, 68.4]14.6 [9.6, 18.9]
 5–10 y38.2 [16.1, 47.3]6.2 [2.0, 26.3]0.9 [ 0.0, 3.9]49.4 [40.8, 57.3]1.5 [0.5, 3.3]
 >10 y39.5 [16.5, 48.1]8.3 [2.7, 26.1]2.5 [1.0, 7.4]53.8 [39.1, 60.4]4.8 [3.1, 8.1]
  • Values in table represent median [interquartile range].