Tibial Derotational Osteotomy for Patellofemoral Instability: A Systematic Review

Table 4

Average improvement of patient-reported outcome measures compared to preoperative values.

Patient-reportedoutcome measure	Postoperative improvement at follow-up (average among studies)	Exceeds minimal clinically important difference?
Visual analogue scale (VAS) pain ratings	4.73 points decrease [17, 18, 31, 32]	Yes (MCID = 3.2) [34]
Kujala patellofemoral score	54.2 points increase [18, 30]	Yes (MCID = 13.5) [35]
Knee society score	Part 1: 54.3 points increase part 2: 53.9 points increase [17, 18]	Yes (MCID = 8.6 for cumulative score) [36]
Short form-12	Physical: 19.2 points increase mental: 32.2 points increase [17, 18]	Yes (MCID = 7.2 and 6.3 for physical and mental sections, respectively) [36]