George R Matcuk1, Spencer E Price2, Dakshesh B Patel2, Eric A White2, Steven Cen2. 1. Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States. Electronic address: matcuk@usc.edu. 2. Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, United States.
Abstract
PURPOSE: To evaluate the inter-rater agreement for description of labral tears and measures of femoroacetabular impingement (FAI) on 3 T hip MR arthrography. MATERIALS AND METHODS: 53 hip MR arthrograms were reviewed by three musculoskeletal radiologists. Labral tears were described (Czerny classification) with extents recorded. Cam- and pincer-type FAI measures were performed. Intraclass correlation (ICC) and kappa statistic (κ) assessed inter-observer agreement. RESULTS: There was fair agreement for labral tear description (κ = 0.25-0.39) and for alpha angles (ICC = 0.54), and fair to excellent agreement for other measures of FAI (ICC = 0.51-0.90). CONCLUSION: There is moderate inter-observer variability reporting labral tears and measures of FAI.
PURPOSE: To evaluate the inter-rater agreement for description of labral tears and measures of femoroacetabular impingement (FAI) on 3 T hip MR arthrography. MATERIALS AND METHODS: 53 hip MR arthrograms were reviewed by three musculoskeletal radiologists. Labral tears were described (Czerny classification) with extents recorded. Cam- and pincer-type FAI measures were performed. Intraclass correlation (ICC) and kappa statistic (κ) assessed inter-observer agreement. RESULTS: There was fair agreement for labral tear description (κ = 0.25-0.39) and for alpha angles (ICC = 0.54), and fair to excellent agreement for other measures of FAI (ICC = 0.51-0.90). CONCLUSION: There is moderate inter-observer variability reporting labral tears and measures of FAI.