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

本研究旨在探讨全髋关节置换术(THA)患者的健康相关生活质量与体力活动水平之间的关系。问卷(牛津髋关节评分、SF-8、EQ5D)分别于术前、术后进行。用带有单轴加速度计的小型计步器测量10天的体力活动，以确定步数(步数/天)和体力活动时间(分钟/天)。术前、术后进行三维步态分析。在日本THA患者中，体力活动水平的改善与健康相关的生活质量评分相关，这表明体力活动水平在这些患者的生活质量中起着重要作用。本研究旨在探讨全髋关节置换术患者步态改善的影响因素。对43例女性单侧髋关节骨性关节炎患者进行了步态分析。所有患者在手术前、术后2个月、6个月和12个月进行分析。与对照组相比，髋关节骨性关节炎患者的时空参数显著降低。术后12个月，患者的时空参数的平均值有了显著的改善，但并没有达到与健康受试者相同的值。在整个随访期内，骨关节炎的分期和腿长差异的变化是影响全髋关节置换术后步态改善的最大因素。

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). 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). And 3D gait analysis was performed pre and post operatively. 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. We aimed to investigate the factors influencing gait improvement in the patients who had undergone total hip arthroplasty. We performed gait analysis on 43 female patients with unilateral hip osteoarthritis. All the patients were analyzed before and at 2, 6, and 12 months after the surgery. There were significant reductions in spatiotemporal parameters in the patients with hip osteoarthritis compared with the control group. The mean values of the spatiotemporal parameters of the patients showed considerable improvement by 12 months after surgery ; however, they did not reach the same values as those observed in the healthy subjects. The stage of osteoarthritis and the changes in the leg-length discrepancies were the factors that most influenced gait improvement after total hip arthroplasty throughout the follow-up period.