Abstract
Objective To evaluate the inter- and intraobserver reliability of the Outerbridge, Beck, and
Haddad classifications for acetabular joint cartilage lesions through the arthroscopic
procedure.
Methods A total of 60 hip arthroscopy videos were evaluated twice by 4 surgeons at 2 different
times to assess the inter- and intraobserver reproducibility of the classifications,
and the data was analyzed by means of the weighted Cohen Kappa index.
Results The mean weighted Kappa values in the interobserver assessment of the Outerbridge,
Beck, and Haddad classifications were, respectively, 0.72, 0.78, and 0.68. The three
classifications were considered as presenting good interobserver agreement. Regarding
the intraobserver assessment of the Outerbridge, Beck, and Haddad classifications,
the weighted Kappa values were, respectively, 0.9, 0.9, and 0.93. The three classifications
were considered as presenting excellent intraobserver agreement.
Conclusion In the present series, the Outerbridge, Beck, and Haddad classifications presented
good interobserver reproducibility and excellent intraobserver reproducibility when
evaluating acetabular chondral lesions by the arthroscopic approach.
Keywords
arthroscopy - hip - cartilage diseases/classification - reproducibility of results
