Table 5.
Pre- and postoperative gait during level walking and stair negotiation of patients receiving the standard medial parapatellar approach
| Parameter | Preoperative | Two months postoperative | p value |
|---|---|---|---|
| Spatiotemporal | |||
| Level walking | |||
| Double-limb support (%) | 32 ± 5 | 29 ± 3 | 0.002 |
| Involved single-limb support (%) | 33 ± 3 | 35 ± 2 | 0.004 |
| Walking speed (m/second) | 0.89 ± 0.25 | 1.02 ± 0.17 | 0.005 |
| Stride length (m) | 1.05 ± 0.21 | 1.16 ± 0.14 | 0.003 |
| Kinematics/Kinetics | |||
| Level walking | |||
| Knee varus moment (Nm/kg) | 0.35 ± 0.18 | 0.26 ± 0.08 | 0.044 |
| Ankle plantarflexion moment (Nm/kg) | 1.17 ± 0.31 | 1.23 ± 0.24 | 0.028 |
| Knee power generation (W/kg) | 0.22 ± 0.16 | 0.31 ± 0.10 | 0.018 |
| Ankle power generation (W/kg) | 1.48 ± 0.56 | 1.80 ± 0.70 | 0.016 |
| Ankle power absorption (W/kg) | 0.56 ± 0.17 | 0.65 ± 0.20 | 0.048 |
| Up stairs | |||
| Knee flexion angle (°) | 79.09 ± 5.06 | 84.36 ± 4.77 | 0.029 |
| Knee power generation (W/kg) | 0.68 ± 0.31 | 1.09 ± 0.60 | 0.048 |
| Down stairs | |||
| Knee flexion angle (°) | 78.38 ± 7.70 | 84.59 ± 5.23 | 0.048 |
| Knee extension moment (Nm/kg) | 0.19 ± 0.13 | 0.34 ± 0.12 | 0.013 |
| Knee power absorption (W/kg) | 1.25 ± 0.45 | 2.02 ± 0.69 | 0.024 |
Values are expressed as mean ± SD.