Prospective study of physical activity and quality of life in Japanese patients undergoing hip arthroplasty and knee arthroplasty

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The purpose of this study was to investigate the relationship between health related QoL and physical activity levels among patients undergoing Total Hip Arthroplasty(THA) in Japan. Participants undergoing primary THA. Questionnaires(the Oxford hip score, the SF-8 and EQ5D) were self-administered preoperatively, and after THA. Physical activities were measured by a small pedometer with a uni-axial accelerometer for ten days, to determine the number of steps(steps/ day) as well as the time spent in physical activity(minutes/ day). Improvements in physical activity levels were correlated with health-related QoL scores in Japanese THA patients, suggesting that physical activity levels play an important role in QoL in these patients