Table 2.
Comparison of clinical and radiographic outcomes among the three groups at last followup
| Variable | High-flexion CR (n = 47) | High-flexion PS (n = 42) | Standard CR (n = 48) | p value |
|---|---|---|---|---|
| Maximal flexion (°)* | 135.3 ± 7.5 | 133.6 ± 8.7 | 135.6 ± 7.0 | 0.41 |
| Change in maximal flexion (°)* | 2.2 ± 9.9 | 1.4 ± 12.1 | 3.5 ± 11.1 | 0.30 |
| Kneeling (number of patients) | 22 (42%) | 20 (48%) | 24 (50%) | 0.86 |
| Crossleg squatting (number of patients) | 35 (74%) | 30 (71%) | 38 (79%) | 0.73 |
| Knee Society score (points)* | ||||
| Pain | 44.0 ± 6.0 | 42.0 ± 8.3 | 44.6 ± 7.2 | 0.22 |
| Function | 89.0 ± 9.8 | 90.1 ± 8.3 | 89.7 ± 11.1 | 0.87 |
| WOMAC score (points)* | 20.0 ± 12.5 | 23.6 ± 11.5 | 20.5 ± 12.0 | 0.36 |
| Radiolucent line (number of knees) | ||||
| Femoral component | 0.82 | |||
| Zone 1 | 5 | 5 | 5 | |
| Zone 4 | 1 | |||
| Tibial component | 0.58 | |||
| Zone 1 | 4 | 4 | 2 | |
* Values are expressed as mean ± SD; CR = PCL retaining; PS = PCL substituting.