Patient-Reported Quality of Life Before and After Total Knee Arthroplasty: A Multicenter Observational Study.

HRQoL improved considerably after TKA. However, there was heterogeneity in the changes in HRQoL depending on patients' socioeconomic status, exercise, and baseline knee function. Dynamic tracking of the HRQoL of TKA patients and timely provision of rehabilitation guidance will promote continuous improvement of the HRQoL of TKA patients.