• Daniel H Williams, Nelson V Greidanus, Bassam A Masri, Clive P Duncan, and Donald S Garbuz.
• Division of Lower Limb Reconstruction and Oncology, Department of Orthopaedics, University of British Columbia, Room 3114, 910 West 10th Avenue, Vancouver, BC V5Z 4E3, Canada.
• Clin. Orthop. Relat. Res. 2012 Feb 1;470(2):555-61.

BackgroundWhile the primary objective of joint arthroplasty is to improve patient quality of life, pain, and function, younger active patients often demand a return to higher function that includes sporting activity. Knowledge of rates and predictors of return to sports will help inform expectations in patients anticipating return to sports after joint arthroplasty.Questions/PurposesWe measured the rate of sports participation at 1 year using the UCLA activity score and explored 11 variables, including choice of procedure/prosthesis, that might predict return to a high level of sporting activity, when controlling for potential confounding variables.MethodsWe retrospectively evaluated 736 patients who underwent primary metal-on-polyethylene THA, metal-on-metal THA, hip resurfacing arthroplasty, revision THA, primary TKA, unicompartmental knee arthroplasty, and revision TKA between May 2005 and June 2007. We obtained UCLA activity scores on all patients; we defined high activity as a UCLA score of 7 or more. We evaluated patient demographics (age, sex, BMI, comorbidity), quality of life (WOMAC score, Oxford Hip Score, SF-12 score), and surgeon- and procedural/implant-specific variables to identify factors associated with postoperative activity score. Minimum followup was 11 months (mean, 12.1 months; range, 11-13 months).ResultsPreoperative UCLA activity score, age, male sex, and BMI predicted high activity scores. The type of operation and implant characteristics did not predict return to high activity sports.ConclusionsOur data suggest patient-specific factors predict postoperative activity rather than factors specific to type of surgery, implant, or surgeon factors.Level Of EvidenceLevel II, prognostic study. See the Guidelines for Authors for a complete description of levels of evidence.

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