Table 1.
Comparison of baseline characteristics
| Variable | Group 1 (n = 59) |
Group 2 (n = 33) |
P value |
|---|---|---|---|
| Age a (year) | 54.3 ± 5.2 | 55.5 ± 4.4 | 0.261 |
| Gender b | 0.745 | ||
| Male | 16 (27.1%) | 10 (30.3%) | |
| Female | 43 (72.9%) | 23 (69.7%) | |
| BMI a (kg/m2) | 26.2 ± 5.9 | 25.6 ± 5.2 | 0.613 |
| Load-bearing axis deviation a (%) | 19.0 ± 11.7 | 19.3 ± 10.5 | 0.905 |
| Hip-Knee-Ankle angle a (varus,°) | 7.9 ± 2.9 | 7.7 ± 2.7 | 0.762 |
| Medial proximal tibial angle a (°) | 84.0 ± 2.2 | 84.1 ± 1.9 | 0.843 |
| Joint line convergence angle a (°) | 3.2 ± 1.7 | 2.9 ± 1.7 | 0.437 |
| Posterior tibial slope (°) | 5.7 ± 3.2 | 6.2 ± 4.0 | 0.590 |
| Blackburne-Peel ratio a | 0.9 ± 0.2 | 0.9 ± 0.2 | 0.186 |
| Caton-Deschamps ratio a | 1.0 ± 0.2 | 1.1 ± 0.2 | 0.132 |
| Lateral patellofemoral angle a (°) | 13.9 ± 4.5 | 12.3 ± 4.3 | 0.098 |
| Trochlear dysplasia grade according to the Dejour classificationb | 0.547 | ||
| No | 56 (94.9%) | 32 (97.0%) | |
| Type A | 3 (5.1%) | 1 (25.0%) | |
| Kellgren–Lawrence gradeb | 0.637 | ||
| Grade 1 | 0 (0.0%) | 1 (3.0%) | |
| Grade 2 | 12 (20.3%) | 7 (21.2%) | |
| Grade 3 | 37 (62.7%) | 21 (63.6%) | |
| Grade 4 | 10 (16.9%) | 4 (12.1%) | |
| Patellofemoral osteoarthritis stage according to Iwano’s classificationb | 0.096 | ||
| Stage 0 | 10 (16.9%) | 12 (36.4%) | |
| Stage 1 | 27 (45.8%) | 13 (39.4%) | |
| Stage 2 | 22 (37.3%) | 8 (24.2%) | |
| Correction angle a (°) | 11.0 ± 2.1 | 11.3 ± 2.6 | 0.585 |
| Time to hardware removal (months) a | 21.7 ± 6.2 | 21.2 ± 5.3 | 0.664 |
| Preoperative VAS score a | 68.4 ± 17.7 | 63.4 ± 19.8 | 0.223 |
| Preoperative IKDC subjective score a | 33.8 ± 11.8 | 36.7 ± 14.8 | 0.308 |
| Preoperative Kujala score a | 38.3 ± 14.7 | 37.5 ± 16.9 | 0.812 |
BMI body mass index, VAS Visual analogue scale, IKDC International Knee Documentation Committee
a The values are given as the mean and standard deviation
b The values are given as the number of patients, with the percentage in parenthesis