Table 1.
Demographic characteristics of enrolled patients
| Variable | Mild varus group (< 10°) | Moderate varus group (10°–20°) | Severe varus group (> 20°) |
|---|---|---|---|
| Number of knees | 17 | 61 | 12 |
| Age (years)* | 74 ± 2 | 75 ± 1 | 76 ± 2 |
| Sex (% male)† | 12 | 7 | 17 |
| Diagnosis (% osteoarthritis) | 100 | 100 | 100 |
| Preoperative ROM (°)* | 114 ± 19 | 116 ± 25 | 103 ± 25 |
| Number of flexion contractures ≥ 15° | 2 | 9 | 2 |
| Bone defects of the medial tibial plateau (mm)*, ‡ | 4.2 ± 3.9 | 6.1 ± 2.9 | 9.0 ± 3.0 |
| Number of bone defects of the medial tibial plateau ≥ 11 mm | 1 | 1 | 1 |
| Postoperative hip-knee-ankle angle (°)* | 0 ± 4 | 1 ± 3 | 1 ± 3 |
* Values are expressed as mean ± SD; †because there were few men, it was not possible to analyze differences between men and women; ‡bone defects of the medial tibial plateau were larger (p = 0.004) in the severe varus group than in the mild varus group.