Avaliação da reprodutibilidade da classificação de Dejour para instabilidade femoropatelar

Abstract

ObjectivesTo evaluate the classification proposed by David Dejour to describe trochlear dysplasia of the knee through inter‐ and intra‐observer reproducibility measurements. MethodsTen patients with trochlear dysplasia were studied. Three physicians members of the Brazilian Society of Knee Surgery were invited to evaluate the images. Intra‐ and inter‐observer analyzes were performed at one‐week intervals. The reproducibility was evaluated in four scenarios: using only radiography; using radiography and tomography; using radiography and consulting the classification at the moment; and using radiography and tomography, consulting the classification at the moment. ResultsThe intraobserver evaluation presented discordant results. In the interobserver analysis, the degree of agreement was low for the analyses that used only radiography and excellent for those in which both radiography and tomography were used. ConclusionsThe Dejour classification presented a low intra and inter‐observer reproducibility when only the profile radiography was used. It was demonstrated that the use of the radiography alone to classify may generate lack of uniformity even among experienced observers. However, when radiography and tomography were combined, reproducibility improved.