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The Journal of Arthroplasty, ISSN: 0883-5403, Vol: 15, Issue: 2, Page: 200-204
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The accuracy of assessing total hip arthroplasty outcomes
D. L. Boardman; F. Dorey; B. J. Thomas; J. R. LiebermanHip
The Western Ontario and McMaster University Osteoarthritis Index (WOMAC) and the SF-36 are used to assess subjective outcome after total hip arthroplasty (THA). Although these indices have been validated, neither the WOMAC nor the SF-36 has been tested for accuracy against objective data in this clinical setting. Thirty osteoarthritic patients undergoing elective primary THA were subjectively evaluated preoperatively and 1 year posteoperatively with the WOMAC and the SF-36 and objectively evaluated at the same interval with basic stride analysis and the 6-minute walk test. Correlation analysis of the subjective and objective data (both perioperative improvement and postoperative absolute scores) yielded Pearson coefficients of r = 0.05–0.81. This work demonstrates a sound statistical relationship between walking ability and the functional aspects of the WOMAC and the SF-36, supporting the use of these instruments in assessing the functional outcome after THA.
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