Supplementary Table 1 demonstrated that significant differences (p < 0.05) were observed between the on-time discharge (≤ 48 h) and delayed discharge (> 48 h) cohorts in terms of EF, knee flexion angle, knee extension deficit, preoperative CRP, preoperative eGFR, preoperative ESR, pulse rate, diabetes mellitus, and Barthel Index. Here, CRP is linked to diabetes mellitus.