Association Between the Acquired Functioning and Personal Satisfaction After Total Knee Arthroplasty

Patient satisfaction has gained relevance in clinical practice, and knowing the variables with the greatest predictive power in this assessment is vital. The primary objective of this study was to evaluate the relationship between postoperative satisfaction of patients undergoing total knee arthroplasty (TKA) and acquired functioning and to determine differences between sexes. This retrospective observational study included 183 patients undergoing TKA between 2018–2021. Functioning variables were pain, range of motion, gait distance, and WOMAC domains. There were significant differences in gait distance, pain, and WOMAC between the pre- and postoperative periods. Women had worse scores in final evaluation moments, although satisfaction was similar between the sexes. Satisfaction and the difference and the rate of change in WOMAC were significantly correlated. In the classification and regression tree analysis, the variable that most differentiated satisfaction in women was the WOMAC variation; in men, it was the pain variation rate.