Factors Contributing to the Early Recovery of Timed Up and Go Test Performance after Total Knee Arthroplasty

[Purpose] This study examined factors contributing to the early recovery of Timed Up and Go Test (TUG) performance after total knee arthroplasty (TKA). [Participants and Methods] Measurement was performed in 77 patients, who had undergone TKA, to examine their Trunk Righting Test (TRT) scores, knee extensor strength, Step Test (ST) scores, 5X Sit-to-Stand Test (5STS) scores, and TUG scores. The recovery rate for each item was calculated by comparing measurement values before and after TKA. Multiple regression analysis was performed with the recovery rate for the TUG score as a dependent variable, and those for the other items, in addition to the age, body weight, and BMI value, as explanatory variables. [Results] The 5STS score and TRT score on the surgical side were selected. [Conclusion] The 5STS score and TRT score on the surgical side may contribute to TUG performance recovery at 4 weeks after TKA.