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J Arthroplasty. 2009 Feb;24(2):210-6. doi: 10.1016/j.arth.2007.12.001. Epub 2008 Mar 28.

Patient-reported outcomes after total hip and knee arthroplasty: comparison of midterm results.

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Bristol Implant Research Centre, Avon Orthopaedic Centre, Southmead Hospital, Bristol, UK.


The aim of this study was to compare the midterm functional outcomes of total knee arthroplasty (TKA) and total hip arthroplasty (THA). A cross-sectional postal audit survey of all consecutive patients who had a primary joint replacement at one orthopedic center 5 to 8 years ago was conducted. Participants completed an Oxford hip score or Oxford knee score, which are self-report measures of functional ability. Completed questionnaires were returned from 1112 THA patients and 613 TKA patients, giving a response rate of 72%. The median Oxford knee score of 26 was significantly worse than the median Oxford hip score of 19 (P < .001). In conclusion, TKA patients experience a significantly poorer functional outcome than THA patients 5 to 8 years postoperatively.

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