About 33% patients with osteoarthritis undergoing total hip/knee arthroplasty are not satisfied with the outcome, warranting the need to improve patient selection. Handgrip strength (HGS) has been suggested as a proxy for overall muscle strength and may be associated with post-arthroplasty function. This study aims to assess the association of pre-operative HGS with change in hip/knee function and quality of life in patients with arthroplasty. 226 hip (THA) and 246 knee (TKA) arthroplasty patients were included in this prospective cohort study. Pre-operative HGS was assessed by means of a dynamometer and the HOOS/KOOS and SF-36 questionnaires were collected before arthroplasty and 1 year thereafter. The association of HGS with score change on each sub-domain of the included questionnaires was assessed by linear regression models, adjusting for sex, body mass index and baseline score. Mean pre-operative HGS was 26 kg for patients undergoing THA and 24 kg for those undergoing TKA. HGS was positively associated with an increased improvement score on "function in sport and recreation"-domain in hip (β = 0.68, P = 0.005) and knee (β = 0.52, P = 0.049) and "symptoms"-domain in hip (β = 0.56, P = 0.001). For patients with THA, HGS was associated with the "quality of life" domain (β = 0.33, P = 0.033). In patients with TKA, HGS was associated with the physical component score (β = 0.31, P = 0.001). All statistically significant effects were positive, indicating that with greater pre-operative HGS, an increased gain in 1-year post-surgery score was observed. HGS can be used as a tool to inform patients with OA who are future candidates for a prosthesis about the possible improvements of certain aspects of life after arthroplasty.

中文翻译：

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全髋关节和膝关节置换术后手握力量与患者报告的结局指标之间的关系。

约有33％的接受全髋/膝关节置换术的骨关节炎患者对结果不满意，因此有必要改善患者的选择。有人建议将握力（HGS）用作整体肌肉力量的替代指标，并且可能与关节置换术后的功能有关。这项研究旨在评估关节置换患者术前HGS与髋/膝功能变化和生活质量之间的关系。这项前瞻性队列研究包括了226髋（THA）和246膝（TKA）关节置换患者。术前HGS用测力计评估，并在置换术前和术后1年收集HOOS / KOOS和SF-36问卷。通过线性回归模型评估HGS与所纳入问卷的每个子域得分变化的相关性，并根据性别，体重指数和基线评分。接受THA的患者术前平均HGS为26千克，接受TKA的患者为24千克。HGS与髋部（β= 0.68，P = 0.005）和膝部（β= 0.52，P = 0.049）和髋部（“症状”）域的“运动和娱乐功能”域改善得分增加呈正相关。 β= 0.56，P = 0.001）。对于THA患者，HGS与“生活质量”域相关（β= 0.33，P = 0.033）。在TKA患者中，HGS与身体成分评分相关（β= 0.31，P = 0.001）。所有统计学上的显着效果均为阳性，表明术前HGS越高，观察到的术后1年评分增加。