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The 2021 Association Research Circulation Osseous Classification for Early-Stage Osteonecrosis of the Femoral Head to Computed Tomography–Based Study

Cited 6 time in Web of Science Cited 8 time in Scopus
Authors

Koo, Kyung-Hoi; Mont, Michael A.; Cui, Quanjun; Hines, Jeremy T.; Yoon, Byung-Ho; Novicoff, Wendy M.; Lee, Yun Jong; Cheng, Edward Y.; Drescher, Wolf; Hernigou, Philippe; Kim, Shin-Yoon; Sugano, Nobuhiko; Zhao, De-Wei; Ha, Yong-Chan; Goodman, Stuart B.; Sakai, Takashi; Jones, Lynne C.; Lee, Mel S.; Yamamoto, Takuaki; Lee, Young-Kyun; Kang, Yusuhn; Burgess, James; Chen, Dennis; Quinlan, Nicole; Xu, Jian Zhong; Park, Jung-Wee; Kim, Hong-Seok

Issue Date
2022-06
Publisher
Churchill Livingstone
Citation
Journal of Arthroplasty, Vol.37 No.6, pp.1074-1082
Abstract
© 2022 Elsevier Inc.Background: The Association Research Circulation Osseous developed a novel classification for early-stage (precollapse) osteonecrosis of the femoral head (ONFH). We hypothesized that the novel classification is more reliable and valid when compared to previous 3 classifications: Steinberg, modified Kerboul, and Japanese Investigation Committee classifications. Methods: In the novel classification, necrotic lesions were classified into 3 types: type 1 is a small lesion, where the lateral necrotic margin is medial to the femoral head apex; type 2 is a medium-sized lesion, with the lateral necrotic margin being between the femoral head apex and the lateral acetabular edge; and type 3 is a large lesion, which extends outside the lateral acetabular edge. In a derivation cohort of 40 early-stage osteonecrotic hips based on computed tomography imaging, reliabilities were evaluated using kappa coefficients, and validities to predict future femoral head collapse by chi-squared tests and receiver operating characteristic curve analyses. The predictability for future collapse was also evaluated in a validation cohort of 104 early-stage ONFH. Results: In the derivation cohort, interobserver reliability (k = 0.545) and intraobserver agreement (63%-100%) of the novel method were higher than the other 3 classifications. The novel classification system was best able to predict future collapse (P < .05) and had the best discrimination between non-progressors and progressors in both the derivation cohort (area under the curve = 0.692 [0.522-0.863], P < .05) and the validation cohort (area under the curve = 0.742 [0.644-0.841], P = 2.46 × 10−5). Conclusion: This novel classification is a highly reliable and valid method of those examined. Association Research Circulation Osseous recommends using this method as a unified classification for early-stage ONFH. Level of Evidence: Level III, diagnostic study.
ISSN
0883-5403
URI
https://hdl.handle.net/10371/184419
DOI
https://doi.org/10.1016/j.arth.2022.02.009
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