Clasificación de la morfología del intercóndilo femoral: análisis de reproducibilidad intra e interobservador

Abstract

Introduction: the structure of the intercondyle described by Van Eck et al. It is divided into three types: A, U and W. The first is associated with greater impingement and risk of ACL injury. The objective of this study is to analyze the intra and interobserver reproducibility of the Van Eck classification using magnetic resonance.

Materials and methods: seventy knee MRI images performed at our institution, presented in two stages, were evaluated. Cohen's Kappa index was used to evaluate intra- and interobserver reproducibility.

Results: the intraobserver reliability for Referent 1 was k: 0.71, while for the second referent it was k: 0.83. Obtaining Good to Very Good agreement according to Landis and Koch levels on average. Meanwhile, the interobserver agreement obtained an average k: 0.39, which tells us about a weak correlation. All results were statistically significant p <0.05.

Discussion: in our paper we found that the intraobserver correlation is strong, but the interobserver evaluation is not. We highlight the trend of disparity that is repeated when studying the femoral intercondyle as a risk factor for ACL injuries.

Conclusion: according to the results in our study, strong intra-observer reliability was observed but not inter-observer reliability, which is an important point to validate a classification tool, reducing the validity of the method.