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Reliability of radiologic glenohumeral osteoarthritis classifications

2013; Elsevier BV; Volume: 22; Issue: 8 Linguagem: Inglês

10.1016/j.jse.2012.11.007

1532-6500

Mohammed Elsharkawi, Balkan Cakir, Heiko Reichel, Thomas Kappe,

Musculoskeletal pain and rehabilitation

Background This study was conducted to determine the intraobserver and interobserver reliability of glenohumeral osteoarthritis classification schemes. Materials and methods The plain radiographs of 108 shoulder joints from 96 consecutive patients with glenohumeral osteoarthritis treated at our institution were graded into 6 classification systems by 2 observers on 2 occasions. The intraobserver and interobserver reliability of the classification schemes were determined by using Cohen's κ coefficient and weighted according to Landis and Koch. Results The intraobserver and interobserver reliabilities were 0.907 (observer 1), 0.965 (observer 2), and 0.851 (interobserver) for the Samilson-Prieto grading system; 0.954, 0.948, and 0.869 for the Allain modification; 0.936, 0.830, and 0.791 for the Gerber modification; 0.887, 0.892, and 0.744 for the Kellgren and Lawrence classification; 0.873, 0.964, and 0.935 for the Weinstein; and 0.854, 0.934, and 0.797 for the Guyette grading system. Conclusion The classification systems according to Weinstein and Guyette and the modifications of the Samilson-Prieto classification according to Allain and Gerber showed a comparable reliability with the commonly used glenohumeral osteoarthritis grading systems according to Samilson-Prieto and Kellgren-Lawrence. Thus, they are recommended for clinical and especially scientific purposes. This study was conducted to determine the intraobserver and interobserver reliability of glenohumeral osteoarthritis classification schemes. The plain radiographs of 108 shoulder joints from 96 consecutive patients with glenohumeral osteoarthritis treated at our institution were graded into 6 classification systems by 2 observers on 2 occasions. The intraobserver and interobserver reliability of the classification schemes were determined by using Cohen's κ coefficient and weighted according to Landis and Koch. The intraobserver and interobserver reliabilities were 0.907 (observer 1), 0.965 (observer 2), and 0.851 (interobserver) for the Samilson-Prieto grading system; 0.954, 0.948, and 0.869 for the Allain modification; 0.936, 0.830, and 0.791 for the Gerber modification; 0.887, 0.892, and 0.744 for the Kellgren and Lawrence classification; 0.873, 0.964, and 0.935 for the Weinstein; and 0.854, 0.934, and 0.797 for the Guyette grading system. The classification systems according to Weinstein and Guyette and the modifications of the Samilson-Prieto classification according to Allain and Gerber showed a comparable reliability with the commonly used glenohumeral osteoarthritis grading systems according to Samilson-Prieto and Kellgren-Lawrence. Thus, they are recommended for clinical and especially scientific purposes.