title: Medical outcome after immediate computed tomography or admission for observation in patients with mild head injury: randomised controlled trial.
abstract: OBJECTIVE
  To compare immediate computed tomography during triage for admission with observation in hospital in patients with mild head injury.
  
  
  METHODS
  Multicentre, pragmatic, non-inferiority randomised trial.
  
  
  METHODS
  39 acute hospitals in Sweden.
  
  
  METHODS
  2602 patients (aged > or = 6) with mild head injury.
  
  
  METHODS
  Immediate computed tomography or admission for observation.
  
  
  METHODS
  Dichotomised extended Glasgow outcome scale (1-7 v 8). The non-inferiority margin was 5 percentage points.
  
  
  RESULTS
  At three months, 275 patients (21.4%) in the computed tomography group had not recovered completely compared with 300 (24.2%) admitted for observation. The difference was - 2.8 percentage points, non-significantly in favour of computed tomography (95% confidence interval - 6.1% to 0.6%). The worst outcomes (mortality and more severe loss of function) were similar between the groups. In the patients admitted for observation, there was a considerable delay in time to treatment in those who required surgery. None of the patients with normal findings on immediate computed tomography had complications later. Patients' satisfaction with the two strategies was similar.
  
  
  CONCLUSIONS
  The use of computed tomography in the management of patients with mild head injury is feasible and leads to similar clinical outcomes compared with observation in hospital.
  
  
  BACKGROUND
  ISRCTN81464462.
authors.affiliation: Department of Medicine, Clinical Epidemiology Unit, Karolinska University Hospital, 171 76 Stockholm, Sweden. jean-luc.af.geijerstam@ki.se
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: af Geijerstam
authors.forename: Sven
authors.initials: S
authors.lastname: Oredsson
authors.forename: Mona
authors.initials: M
authors.lastname: Britton
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D006259:Craniocerebral Trauma / Q000000981:diagnostic imaging* / Q000628:therapy; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012307:Risk Factors; D014057:Tomography, X-Ray Computed