Table 4.
Pre-operative variables and 2-year results: BMI ≥30 kg/m2.
| Variable | BMI <30 kg/m2 n = 78 | BMI ≥30 kg/m2 n = 23 | p-value |
|---|---|---|---|
| Op duration (min) | 95.8 ± 10.8 | 97.0 ± 10.5 | 0.64 |
| Pre-operative Knee extension (°) | 9.7 ± 12.5 | 6.1 ± 6.9 | 0.19 |
| Pre-operative Knee flexion (°) | 121.2 ± 16.6 | 111.8 ± 16.7 | 0.020 |
| Pre-operative Fixed flexion deformity (°) | 3.7 ± 5.0 | 2.3 ± 3.2 | 0.099 |
| Pre-operative Extensor lag (°) | 0.39 ± 1.6 | 0.0 ± 0.0 | 0.033 |
| Pre-operative Straight-leg raising lag (°) | 0.52 ± 2.5 | 0.0 ± 0.0 | 0.075 |
| Pre-operative Oxford Knee score |
34.1 ± 8.2 |
32.6 ± 7.8 |
0.44 |
| 2-year Knee extension (°) | 2.3 ± 5.2 | 0.2 ± 3.5 | 0.069 |
| 2-year Knee flexion (°) | 114.8 ± 16.0 | 111.3 ± 11.7 | 0.33 |
| 2-year Fixed flexion deformity (°) | 0.78 ± 2.3 | 0.22 ± 1.0 | 0.10 |
| 2-year Extensor lag (°) | 0.26 ± 1.1 | 0.0 ± 0.0 | 0.045 |
| 2-year Straight-leg raising lag (°) | 0.25 ± 1.1 | 0.0 ± 0.0 | 0.051 |
| 2-year Oxford Knee score | 18.3 ± 4.7 | 20.7 ± 7.8 | 0.70 |
| Post-op radiographic axis >3° | 4/78 (5.1%) | 0/23 (0.0%) | 0.57 |