Table 1.
Measurement results at 0° and 30° flexion (mean±SD)
| Indexes | 0°(40 cases) | 30°(40 cases) | t | P |
|---|---|---|---|---|
| TFFR (°) | −1.8 ± 1.3 | 8.1 ± 1.5** | −25.3 | 0.000 |
| CA (°) | 23.6 ± 2.7 | −7.4 ± 1.8** | 46.7 | 0.000 |
| PTA (°) | 14.5 ± 1.1 | 8.0 ± 1.2** | 22.5 | 0.000 |
| TT–TG (mm) | 15.4 ± 1.3 | 9.2 ± 1.4** | 18.5 | 0.000 |
| LPD (mm) | 5.8 ± 1.3 | −0.8 ± 1.5** | 15.4 | 0.000 |
**
Significant difference between 30° and 0° (P < 0.01).
CA, congruence angle; LPD, lateral patella displacement; PTA, patella tilt angle; TRRF, tibia rotation relative to femur; TT–TG, tibia tuberosity‐trochlear groove distance.