title: ASSESSMENT OF THE REPRODUCIBILITY OF THE OUTERBRIDGE AND FSA CLASSIFICATIONS FOR CHONDRAL LESIONS OF THE KNEE.
abstract: OBJECTIVE
  To assess the reproducibility of the Outerbridge and the French Society of Arthroscopy classifications between different observers, and to establish a comparison between them.
  
  
  METHODS
  Thirty videos on randomly selected knee arthroscopy procedures demonstrating chondral lesions were used. These were classified by six observers: two third-year orthopedics residents and four orthopedic surgeons, of whom two were knee surgery specialists. The intraobserver and interobserver reliability was evaluated by means of the kappa index.
  
  
  RESULTS
  The result from the complete evaluation on the Outerbridge classification with all the observers gave a kappa index of 0.434411. For the classification proposed by the French Society of Arthroscopy, the kappa index was 0.45166.
  
  
  CONCLUSIONS
  The Outerbridge and French Society of Arthroscopy classifications for chondral lesions are moderately reproducible between observers. Comparing the two classifications, the proposal from the French Society of Arthroscopy was shown to be more reproducible, and the authors suggest that this classification should be used preferentially in clinical practice for evaluations on chondral lesions of the knee.
authors.affiliation: Head of the Orthopedics and Traumatology Service, São José University Hospital, Minas Gerais School of Medical Sciences, Belo Horizonte (HUSJ-FCMMG-BH) and Titular Professor and Chair of Orthopedics and Traumatology, Minas Gerais School of Medical Sciences; Former President of SBOT.
authors.forename: Neylor Pace
authors.initials: NP
authors.lastname: Lasmar
authors.affiliation: Member of the Knee Surgery Service, São José University Hospital, Minas Gerais School of Medical Sciences, Belo Horizonte (HUSJ-FCMMG-BH) and Adjunct Professor of Orthopedics and Traumatology, Minas Gerais School of Medical Science.
authors.forename: Rodrigo Campos Pace
authors.initials: RC
authors.lastname: Lasmar
authors.affiliation: Member of the Knee Surgery Service, São José University Hospital, Minas Gerais School of Medical Sciences, Belo Horizonte (HUSJ-FCMMG-BH) and Head of the Medical Department of Clube Atlético Mineiro; Physician of the Brazilian National Soccer Team.
authors.forename: Rodrigo Barreiros
authors.initials: RB
authors.lastname: Vieira
authors.affiliation: Member of the Knee Surgery Service, São José University Hospital, Minas Gerais School of Medical Sciences, Belo Horizonte (HUSJ-FCMMG-BH) and Head of the Medical Department of Clube Atlético Mineiro; Physician of the Brazilian National Soccer Team.
authors.forename: Juraci Rosa
authors.initials: JR
authors.lastname: de Oliveira
authors.affiliation: Orthopedist (R4) in the Knee Surgery Service, São José University Hospital, Minas Gerais School of Medical Sciences, Belo Horizonte (HUSJ-FCMMG-BH).
authors.forename: André Campos
authors.initials: AC
authors.lastname: Scarpa
keywords: Arthroscopy; Knee Injuries/classification; Knee Injuries/pathology