Patients in the PES cohort had a significantly shorter mean LoS of two days (mean 4.7 days) versus the Pre-PES patients (mean 6.7 days; p < 0.001) in multivariate analysis. PES was also associated with a significant reduction in rates of reoperation within 60 days compared with Pre-PES (adjusted rate 2.2% versus 5.0%, p = 0.031). There were no statistically significant differences in the 60-day complication rate and 30-day readmission rate. All PROMs in the PES cohort demonstrated significant improvement (change from baseline to six months postoperative) compared with Pre-PES (Oxford Knee Score, 20.1 versus 15.5, p < 0.001; EQ-5D Index, 0.40 versus 0.32, p = 0.005; and EQ VAS, 22.9 versus 8.3, p < 0.001).