Liu, J Yang Y, Wan S, et al. - This study sought to ascertain which factors contribute to patient satisfaction and compared the various scoring systems before and after surgery. Researchers performed a retrospective cohort study including a total of 545 patients and evaluated preoperatively and 1 year postoperatively. They recorded patient demographics, as well as scores for the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Short Form (SF)-12, and 1989 Knee Society Clinical Rating System (1989 KSS), preoperatively and postoperatively. The results showed that after primary TKA, a history of surgery, the preoperative 1989 KSS, and the preoperative SF-12 influenced patient satisfaction. The WOMAC (particularly the pain subscale score) was recommended to reflect overall patient satisfaction postoperatively.