Table 2.
Pre-operative variables and 2-year results: BMI ≥23 kg/m2.
| Variable | BMI <23 kg/m2 n = 13 | BMI ≥23 kg/m2 n = 88 | p-value |
|---|---|---|---|
| Op duration (min) | 88.8 ± 10.8 | 97.1 ± 10.3 | 0.008 |
| Pre-operative Knee extension (°) | 4.8 ± 7.8 | 9.5 ± 11.9 | 0.19 |
| Pre-operative Knee flexion (°) | 121.3 ± 19.3 | 118.7 ± 16.7 | 0.63 |
| Pre-operative Fixed flexion deformity (°) | 2.2 ± 3.1 | 3.6 ± 4.8 | 0.33 |
| Pre-operative Extensor lag (°) | 1.3 ± 3.1 | 0.17 ± 0.91 | 0.26 |
| Pre-operative Straight-leg raising lag (°) | 2.0 ± 5.8 | 0.18 ± 1.0 | 0.30 |
| Pre-operative Oxford Knee score |
32.2 ± 6.4 |
34.0 ± 8.4 |
0.45 |
| 2-year Knee extension (°) | −0.2 ± 4.0 | 2.1 ± 5.0 | 0.12 |
| 2-year Knee flexion (°) | 116.7 ± 13.9 | 113.6 ± 15.3 | 0.50 |
| 2-year Fixed flexion deformity (°) | 0.15 ± 0.55 | 0.72 ± 2.2 | 0.36 |
| 2-year Extensor lag (°) | 0.77 ± 1.9 | 0.11 ± 0.75 | 0.24 |
| 2-year Straight-leg raising lag (°) | 0.62 ± 1.6 | 0.13 ± 0.83 | 0.29 |
| 2-year Oxford Knee score | 18.0 ± 2.1 | 19.0 ± 6.0 | 0.55 |
| Post-op radiographic axis >3° | 1/13 (7.7%) | 3/88 (3.4%) | 0.42 |