Rezzadeh Kevin, Behery Omar A, Kester Benjamin S, Long William J, Schwarzkopf Ran
Division of Adult Reconstruction, Department of Orthopaedic Surgery, NYU Langone Hospital for Joint Diseases, NY, USA.
Geriatr Orthop Surg Rehabil. 2019 Jan 16;10:2151459318816480. doi: 10.1177/2151459318816480. eCollection 2019.
Preliminary analysis of accelerometry measurements has shown physical activity may not increase significantly after total knee arthroplasty (TKA). This study evaluates the effect of TKA on physical activity accelerometry measurements and body mass index (BMI).
Using the multicenter Osteoarthritis Initiative (OAI) database, a cohort of patients with physical activity level accelerometry measurements and BMI before and after TKA was identified. Physical activity levels and BMI were acquired at pre-TKA and post-TKA accelerometry visits 2 years apart. Survey scores pertaining to knee functionality and quality of life were also analyzed before and after knee surgery. Each patient included in the study had a unilateral TKA completed between these 2 accelerometry visits. Accelerometry measurements, BMI of the patients, and survey scores relating to knee functionality and pain relief from before and after TKA were compared using paired samples tests.
Twenty-three patients from the OAI database were identified for the paired analysis. They were evaluated at a mean postoperative follow-up of 15 months. There were no statistically significant differences between the post-TKA group and pre-TKA group for the accelerometry variables and BMI, though patients experienced a significant improvement in knee function and pain relief measures included in this analysis.
Although TKA can successfully restore function and relieve pain, there remains no good evidence that neither physical activity nor BMI improve postoperatively.
No significant differences in physical activity and BMI were observed after TKA in this study.
加速度测量的初步分析表明，全膝关节置换术（TKA）后身体活动可能不会显著增加。本研究评估了TKA对身体活动加速度测量和体重指数（BMI）的影响。
利用多中心骨关节炎倡议（OAI）数据库，确定了一组在TKA前后进行身体活动水平加速度测量和BMI测量的患者。在相隔2年的TKA术前和术后加速度测量访视中获取身体活动水平和BMI。还分析了膝关节手术前后与膝关节功能和生活质量相关的调查评分。纳入研究的每位患者在这两次加速度测量访视之间完成了单侧TKA。使用配对样本检验比较TKA前后患者的加速度测量值、BMI以及与膝关节功能和疼痛缓解相关的调查评分。
从OAI数据库中确定了23名患者进行配对分析。他们在术后平均15个月的随访中接受评估。TKA后组和TKA前组在加速度测量变量和BMI方面没有统计学上的显著差异，不过患者在本分析中纳入的膝关节功能和疼痛缓解措施方面有显著改善。
尽管TKA可以成功恢复功能并缓解疼痛，但仍然没有充分的证据表明术后身体活动或BMI会改善。
本研究中TKA后未观察到身体活动和BMI有显著差异。
