Konrads Christian, Gonser Christoph, Ahmad Sufian S
Department of Trauma and Reconstructive Surgery, BG Klinik, University of Tübingen, Tübingen, Germany.
Department of Orthopaedics, University of Würzburg, Würzburg, Germany.
Bone Jt Open. 2020 Nov 2;1(7):355-358. doi: 10.1302/2633-1462.17.BJO-2020-0048.R1. eCollection 2020 Jul.
The Oswestry-Bristol Classification (OBC) was recently described as an MRI-based classification tool for the femoral trochlear. The authors demonstrated better inter- and intraobserver agreement compared to the Dejour classification. As the OBC could potentially provide a very useful MRI-based grading system for trochlear dysplasia, it was the aim to determine the inter- and intraobserver reliability of the classification system from the perspective of the non-founder.
Two orthopaedic surgeons independently assessed 50 MRI scans for trochlear dysplasia and classified each according to the OBC. Both observers repeated the assessments after six weeks. The inter- and intraobserver agreement was determined using Cohen's kappa statistic and S-statistic nominal and linear weights.
The OBC with grading into four different trochlear forms showed excellent inter- and intraobserver agreement with a mean kappa of 0.78.
The OBC is a simple MRI-based classification system with high inter- and intraobserver reliability. It could present a useful tool for grading the severity of trochlear dysplasia in daily practice.Cite this article: 2020;1-7:355-358.
奥斯韦斯特里-布里斯托尔分类法（OBC）最近被描述为一种基于磁共振成像（MRI）的股骨滑车分类工具。与德茹尔分类法相比，作者证明了其在观察者间和观察者内的一致性更好。由于OBC可能为滑车发育不良提供一种非常有用的基于MRI的分级系统，本研究旨在从非创建者的角度确定该分类系统在观察者间和观察者内的可靠性。
两名骨科医生独立评估50例滑车发育不良的MRI扫描，并根据OBC进行分类。六周后，两名观察者重复评估。使用科恩kappa统计量以及S统计量的名义权重和线性权重来确定观察者间和观察者内的一致性。
OBC将滑车分为四种不同类型，观察者间和观察者内一致性极佳，平均kappa值为0.78。
OBC是一种简单的基于MRI的分类系统，具有较高的观察者间和观察者内可靠性。它可能成为日常实践中评估滑车发育不良严重程度的有用工具。引用本文：2020;1 - 7:355 - 358。
