ArticleJournal of hip preservation surgery2026
Reliability of MRI-based grading using Yoon's classification for labral tears in hip dysplasia.
Article in Journal of hip preservation surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Labral tears in hip dysplasia arise from structural instability and excessive shear forces. Yoon's classification system, based on arthroscopic findings, was developed to reflect the natural course of labral tears in hip dysplasia and guide surgical decision-making. However, its reliability when applied to MRI-based grading remains unclear. We retrospectively included 105 hips from 88 patients with hip dysplasia, including borderline hip dysplasia, who underwent arthroscopic labral repair between 2022 and 2024. Labral tears were classified arthroscopically using Yoon's classification. MRI grading was independently performed by two observers. The reliability between MRI and arthroscopic grading was assessed using Cohen's weighted kappa and Gwet's Agreement Coefficient 1 (AC1); correlation was evaluated with Kendall's tau-b. Inter- and intra-observer reliabilities were also analysed. Most labral tears were arthroscopically graded as Grade 3 (81.0%) and primarily located in Zones 2-3 (79.0%). The reliability between MRI and arthroscopic grading was moderate (κ = 0.49 for observer 1, κ = 0.54 for observer 2). Inter-observer reliability was moderate (κ = 0.60), and intra-observer reliability was good (κ = 0.69) (
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