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Scoring hip osteoarthritis with MRI (SHOMRI): A whole joint osteoarthritis evaluation system
Author(s) -
Lee Sonia,
Nardo Lorenzo,
Kumar Deepak,
Wyatt Cory R.,
Souza Richard B.,
Lynch John,
McCulloch Charles E.,
Majumdar Sharmila,
Lane Nancy E.,
Link Thomas M.
Publication year - 2015
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24722
Subject(s) - medicine , osteoarthritis , kappa , reproducibility , radiography , cohen's kappa , radiology , nuclear medicine , rank correlation , magnetic resonance imaging , pathology , philosophy , linguistics , statistics , alternative medicine , mathematics , machine learning , computer science
Background To develop a semi‐quantitative MR‐based hip osteoarthritis (OA) evaluation system (Scoring hip osteoarthritis with MRI, SHOMRI), and to test its reproducibility and face validity. Methods The study involved 98 subjects with informed consent. Three‐Tesla MR imaging of hip was performed in three planes with intermediate‐weighted fat saturated FSE sequences. Two radiologists assessed cartilage loss, bone marrow edema pattern, subchondral cyst in 10 subregions, and assessed labrum in 4 subregions. In addition, presence or absence of ligamentum teres integrity, paralabral cysts, intra‐articular body, and effusion in the hip joint were analyzed using the SHOMRI system. The reproducibility was assessed with intra‐class correlation coefficient (ICC), Cohen's Kappa values and percent agreement. SHOMRI scores were correlated with radiographic Kellgren‐Lawrence (KL) and OARSI atlas gradings, and clinical parameters, the hip osteoarthritis outcome score (HOOS) and hip range of motion (ROM), using Spearman's rank correlation and ordinal logistic regression. Results ICC values were in the excellent range, 0.91 to 0.97. Cohen's Kappa values and percent agreement ranged from 0.55 to 0.79 and 66 to 99%, respectively. SHOMRI demonstrated significant correlations with KL and OARSI gradings as well as with clinical parameters, HOOS and ROM ( P < 0.05). Among the SHOMRI features, subchondral cyst and bone marrow edema pattern showed the highest correlation with HOOS and ROM. Conclusion SHOMRI demonstrated moderate to excellent reproducibility and significant correlation with radiographic gradings and clinical parameters. J. Magn. Reson. Imaging 2015;41:1549–1557 . © 2014 Wiley Periodicals, Inc .