Table 2.
Preoperative and postoperative changes in patellofemoral joint stability
| Project | Control group (n = 24) | Experimental group (n = 22) | Effect Size | 95% CI | P-value |
|---|---|---|---|---|---|
| CA (x ± s, °) | |||||
| Preoperative | 25.6 ± 2.7 | 24.4 ± 3.0 | 0.42 | [–0.43, 2.67] | 0.151 |
| Postoperative | 1.5 ± 1.5 | 1.7 ± 1.4 | –0.14 | [–0.84, 0.48] | 0.598 |
| PTA (x ± s, °) | |||||
| Postoperative | 29.2 ± 5.8 | 28.0 ± 6.6 | 0.20 | [–2.55, 4.95] | 0.512 |
| Postoperative | 10.6 ± 2.9 | 10.3 ± 4.3 | 0.08 | [–1.28, 1.82] | 0.743 |
| LPD (x ± s, mm) | |||||
| Postoperative | 16.9 ± 4.8 | 15.5 ± 4.0 | 0.32 | [–1.35, 4.23] | 0.292 |
| Postoperative | 4.0 ± 1.0 | 3.4 ± 0.8 | 0.66 | [0.17, 1.02] | 0.007 |
Note: CA: Congruence Angle, the angle between the bisector of the sulcus angle and the line from the sulcus apex to the inferior pole of the patella. PTA: Patellar Tilt Angle, the angle between the line connecting the highest points of the medial and lateral femoral condyles and the maximum transverse diameter extension of the patella. LPD: Lateral Patellar Displacement, the perpendicular distance from the medial edge of the patella to a line connecting the highest points of the medial and lateral femoral condyles, drawn through the medial condyle apex