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Reliability of the Lisfranc injury radiological classification (Myerson-modified Hardcastle classification system)
Shady Mahmoud1, Faisal Hamad1, Muhammad Riaz1
1Department of Orthopaedic Surgery, Hamad General Hospital, P.O. Box 3050, Doha, Qatar.
Purpose:
The objective of our study was to assess the reliability of the radiological classification system (Myerson-modified Hardcastle Classification System) for Lisfranc injury. The classification system is a three-grade ordinal scale based on fracture displacement.
Methods:
Thirty-nine Lisfranc injury radiographs were evaluated by 38 independent observers consisting of consultant orthopaedic surgeons (18), orthopaedic surgery residents (17) and consultant musculoskeletal radiologists (3) on two separate occasions after receiving training in the use of the classification.
Results:
The intra- and inter-observer reliability was assessed using the intraclass correlation coefficient (ICC) and found to be excellent. The mean weighted intra- and inter-observer ICCs were 0.94 (95 % CI 0.89-0.97, p < 0.01) and 0.81 (95 % CI 0.68-0.89, p < 0.01), respectively.
Conclusion:
The Myerson-modified Hardcastle classification system in our study was shown to be reliable and can be used in outcome studies and provide standard terminology among clinicians for Lisfranc injuries.
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