Table 4. Comparisons between the Valgus ≥ 7.7° and Valgus < 7.7° Groups.
| Variable | Valgus ≥ 7.7° (n = 18) | Valgus < 7.7° (n = 51) | p-value |
|---|---|---|---|
| Sex (male : female) | 12 (66.7) : 6 (33.3) | 35 (68.6) : 16 (31.4) | 1.000* |
| Bone age (yr) | 13.2 ± 1.1 | 13.6 ± 1.0 | 0.101† |
| Growth remaining (yr) | 2.1 ± 0.8 | 1.8 ± 0.7 | 0.040† |
| Body mass index (kg/m2) | 24.3 ± 4.1 | 24.2 ± 3.4 | 0.785† |
| Side (right : left) | 11 (61.1) : 7 (38.9) | 27 (52.9) : 24 (47.1) | 0.746* |
| HKA alignment (°) | Valgus 8.8 ± 1.2 (7.7–11.9) | Valgus 5.9 ± 0.7 (5.1–7.5) | < 0.001† |
| mLDFA (°) | 81.2 ± 2.2 | 82.9 ± 1.9 | 0.007† |
| Frequency of mLDFA < 82.5° | 13 (72.2) | 22 (43.1) | 0.065* |
| Contribution of the distal femur (%) | 66.0 ± 19.8 | 71.1 ± 33.9 | 0.243† |
| MPTA (°) | 89.9 ± 2.0 | 89.0 ± 1.8 | 0.073† |
| Frequency of MPTA > 91.5° | 5 (27.8) | 3 (5.9) | 0.024‡ |
| Contribution of the proximal tibia (%) | 34.1 ± 22.6 | 32.8 ± 29.7 | 0.897† |
| JLCA (°) | 0.0 ± 1.0 | 0.2 ± 0.8 | 0.094† |
Values are presented as number (%), mean ± SD, or mean ± SD (range).
HKA: hip-knee-ankle, mLDFA: mechanical lateral distal femoral angle, MPTA: medial proximal tibial angle, JLCA: joint line convergence angle, SD: standard deviation.
*Chi-square test. †Mann-Whitney U-test. ‡Fisher’s exact test.