Ninomiya Kazunari, Hirakawa Kazuo, Ikeda Takashi, Nakura Nariaki, Suzuki Koji
Shonan Kamakura Joint Reconstruction Center.
Showa University Department of Nursing and Rehabilitation Sciences.
Phys Ther Res. 2018 Oct 20;21(2):53-58. doi: 10.1298/ptr.E9941. eCollection 2018.
Long-term results in muscle strength, physical activity (PA), and functional improvement after total hip arthroplasty (THA) have not been studied. The purpose of this study was to evaluate the deficits in functional performance, PA, and high fall rate in patient 10 years after THA compared to healthy adults. The subjects were 58 patients who underwent primary THA for unilateral hip osteoarthritis 10 years, and 46 healthy adults. Hip abductor strength, balance function (single-leg stance time), Maximal Walking Speed (MWS), fall rate, and PA (IPAQ short ver.) were evaluated. The unpaired t-test and χ test were used to assess differences between the groups. Statistical significance was set at p value <0.05. Compared to healthy adults, THA patients had 9.5% less hip abductor muscle strength on the operated side, 42.1% shorter single-leg stance time on the operated side, 14.8% slower MWS, 2.0 times less High-PA group, and 2.8 times higher fall rate (p<0.05). This study showed that hip abductor muscle strength, gait speed, balance function, and PA were significantly lower in patients 10 years after THA than in healthy adults. Additionally, the fall rate was significantly higher in patients 10 years post-THA than in healthy adults.
全髋关节置换术（THA）后肌肉力量、身体活动（PA）和功能改善的长期结果尚未得到研究。本研究的目的是评估与健康成年人相比，全髋关节置换术10年后患者的功能表现、身体活动和高跌倒率方面的缺陷。研究对象为58例因单侧髋骨关节炎接受初次全髋关节置换术10年的患者和46例健康成年人。评估了髋外展肌力量、平衡功能（单腿站立时间）、最大步行速度（MWS）、跌倒率和身体活动（国际体力活动问卷简版）。采用非配对t检验和χ检验评估组间差异。统计学显著性设定为p值<0.05。与健康成年人相比，全髋关节置换术患者患侧髋外展肌力量低9.5%，患侧单腿站立时间短42.1%，最大步行速度慢14.8%，高身体活动组少2.0倍，跌倒率高2.8倍（p<0.05）。本研究表明，全髋关节置换术10年后患者的髋外展肌力量、步态速度、平衡功能和身体活动显著低于健康成年人。此外，全髋关节置换术10年后患者的跌倒率显著高于健康成年人。
