Table 2.
Comparison between pre- and post-operative features
| iMPFL | MPFL+AMZ | |||||
|---|---|---|---|---|---|---|
| Preoperative (SD) | Postoperative (SD) | P value | Preoperative (SD) | Postoperative (SD) | P value | |
| Kujala score | 68.4 (10.1) | 94.9 (5.9) | <.001 | 55.5 (9.3) | 93.8 (6.6) | <.001 |
| Congruence angle, degree | 32.3 (8.0) | 2.9 (11.6) | <.001 | 58.8 (23.1) | −4.8 (34.0) | <.001 |
| Sulcus angle, degree | 140.1 (3.4) | 139.6 (3.3) | .511 | 154.3 (15.8) | 153.6 (15.7) | .704 |
| Tilting angle, degree | 31.4 (7.2) | 18.8 (4.6) | <.001 | 50.7 (31.1) | 15.1 (9.4) | <.001 |
| ISR | 1.19 (0.17) | 1.13 (0.15) | .037 | 1.19 (0.30) | 1.02 (0.23) | .001 |
| Lateral patella displacement, mm | 15.8 (4.8) | 2.5 (2.8) | < .001 | 24.6 (12.5) | 1.3 (3.9) | <.001 |
| TTTG | 17.9 (3.0) | 16.2 (2.4) | .003 | 21.0 (3.1) | 13.7 (3.3) | <.001 |
| Iwano OA grade (0/1/2/3/4), n | 14/0/0/0/0 | 11/2/1/0/0 | 1.00 | 3/9/2/1/1 | 3/10/3/0/0 | <.001 |
SD standard deviation, ISR Insall–Salvati ratio, TTTG tibial tubercle-trochlear groove, OA osteoarthritis