title: Evaluation of the reproducibility of the AO/ASIF classification for humeral shaft fractures.
abstract: OBJECTIVE
  To evaluate the reproducibility of the AO/Asif classification for humeral shaft fractures.
  
  
  METHODS
  Consecutive radiographs of the arm in both anteroposterior and lateral view from 60 patients with humeral shaft fractures were analyzed. Six observers who were familiar with the AO/Asif classification (three shoulder and elbow surgery specialists and three general orthopedists) were selected to make the analysis, which was done at three different times. The data were subjected to statistical analysis using the kappa coefficient.
  
  
  RESULTS
  The intra and interobserver concordance was statistically significant in all the analyses.
  
  
  CONCLUSIONS
  All the evaluators showed concordance between the three evaluations that was considered to be statistically significant. However, the highest values were found among the specialists.
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Gustavo Soriano
authors.initials: GS
authors.lastname: Pignataro
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: André Elias
authors.initials: AE
authors.lastname: Junqueira
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Fabio Teruo
authors.initials: FT
authors.lastname: Matsunaga
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Marcelo Hide
authors.initials: MH
authors.lastname: Matsumoto
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: João Carlos
authors.initials: JC
authors.lastname: Belloti
authors.affiliation: Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Marcel Jun Sugawara
authors.initials: MJ
authors.lastname: Tamaoki
keywords: Humeral fractures/classification; Humeral fractures/radiograph; Humeral fractures/surgery