title: Repruducibility of tronzo and ao/asif classifications for transtrochanteric fractures.
abstract: OBJECTIVE
  To assess the reproducibility of Tronzo and AO/ASIF classifications for transtrochanteric fractures, in order to determine the most appropriate classification for clinical application, and to evaluate the influence of the level of experience of the observers in the agreement between evaluations.
  
  
  METHODS
  We selected 30 radiographic images of transtrochanteric fractures of the femur, which were presented to two groups of observers, one formed by expert physicians and the other by resident physicians.
  
  
  RESULTS
  When evaluated together, Tronzo classification obtained a Kappa value of 0.44. The same classification assessed by the expert group obtained a value of 0.46, while the group of residents' value was 0.44. Evaluating the AO/ASIF classification of the complete pool analysis the value found was 0.42. For the same classification, analyzed by the expert group, obtained a value of 0.41, and by the group of residents, the Kappa value achieved was 0.42. However, when analyzed in its simplified form, the AO/ASIF classification obtained Kappa values of 0.70 (pooled analysis), 0.68 (experts) and 0.72 (residents), considered concurrent.
  
  
  CONCLUSIONS
  The AO/ASIF simplified classification showed substantial reproducibility and is, therefore, recommended as the most suitable for clinical application. The level of experience of the observers did not influence significantly the agreement between evaluations. Level of Evidence III, Diagnostic Study - Investigating a Diagnostic Test.
authors.affiliation: Hospital Naval Marcílio Dias, Rio de Janeiro, RJ, Brazil, Hospital Naval Marcílio Dias, Rio de Janeiro, RJ, Brazil.
authors.forename: Christian
authors.initials: C
authors.lastname: Behrendt
authors.affiliation: Hospital Naval de Salvador, Salvador, BA, Brazil, Hospital Naval de Salvador, Salvador, BA, Brazil.
authors.forename: Thiago Batista
authors.initials: TB
authors.lastname: Faleiro
authors.affiliation: Faculdade Unijorge, Salvador, BA, Brazil, Faculdade Unijorge, Salvador, BA, Brazil.
authors.forename: Renata Da Silva
authors.initials: Rda S
authors.lastname: Schulz
authors.affiliation: Hospital Naval Marcílio Dias, Rio de Janeiro, RJ, Brazil, Hospital Naval Marcílio Dias, Rio de Janeiro, RJ, Brazil.
authors.forename: Bianca Ortiz Da
authors.initials: BO
authors.lastname: Silva
authors.affiliation: Policlínica Naval de Niterói, Niterói, RJ, Brazil, Policlínica Naval de Niterói, Niterói, RJ, Brazil.
authors.forename: Erivaldo Queiróz De
authors.initials: EQ
authors.lastname: Paula Filho
keywords: Femoral fractures; Hip fractures; Orthopedic procedures; Reproducibility of results