title: An outcome study of the use of computed tomography for the diagnosis of appendicitis in a community-based emergency department.
abstract: OBJECTIVE
  Previous studies evaluating the use of CT in the diagnosis of appendicitis have taken place at university-based institutions where surgical bedside consultation seems prudent before radiological study. In the private hospital setting, the emergency department (ED) physician is responsible for diagnosis. We attempt to assess if this process is detrimental to patient care.
  
  
  METHODS
  Retrospective review of 150 patient's records admitted through the ED was performed with the discharge diagnosis of appendicitis between March 1998 and May 2000. Data was stratified for analysis based on age (< 15, 15-50, > 50) and gender. Using Graph Pad Prism software the groups were compared for complications based on whether or not CT was obtained. Chi-square, number needed to treat (NNT), absolute risk reduction (ARR), relative risk reduction (RRR) and respective confidence intervals were calculated for each group.
  
  
  RESULTS
  No significant differences overall were obtained between CT and no CT groups at P < 0.05. A significant benefit is demonstrated at P = 0.017 in females of childbearing age while a detrimental trend is found for those over the age of 50 years.
  
  
  CONCLUSIONS
  Contrary to our initial hypothesis, no increased incidence of appendiceal perforation or abscess was demonstrated based on the ED physician's decision to perform CT without surgical consultation.
authors.affiliation: Department of Emergency Services, Halifax Medical Center, Daytona Beach, FL, USA. rmathis1@cfl.rr.com
authors.forename: Robert D
authors.initials: RD
authors.lastname: Mathis
authors.forename: Andrea B
authors.initials: AB
authors.lastname: Chiumento
authors.forename: Benson
authors.initials: B
authors.lastname: Yeh
authors.forename: Nita
authors.initials: N
authors.lastname: Dollieslager
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001062:Appendectomy; D001064:Appendicitis / Q000000981:diagnostic imaging* / Q000628:therapy; D002648:Child; D004636:Emergency Service, Hospital; D005260:Female; D006764:Hospitals, Community; D006801:Humans; D008297:Male; D008875:Middle Aged; D010043:Outcome and Process Assessment, Health Care; D012189:Retrospective Studies; D013997:Time Factors; D014057:Tomography, X-Ray Computed
chemical_list: D000900:Anti-Bacterial Agents