Table 3 Between-group and within-group comparison of clinical and radiographic outcome measurements for ankle distraction arthroplasty and supramalleolar osteotomy
Ankle distraction arthroplasty (n = 32) | Supramalleolar osteotomy (n = 41) | Between-group comparison at last visit | |||||
|---|---|---|---|---|---|---|---|
Preoperative | Postoperative | * p | Preoperative | Postoperative | * p | # p | |
AOFAS score | 47.1 ± 8.9 | 84.6 ± 6.4 | < 0.001 | 45.4 ± 5.7 | 86.5 ± 7.2 | < 0.001 | 0.564 |
VAS | 5.6 ± 1.4 | 1.4 ± 1.3 | 0.001 | 5.8 ± 1.2 | 1.1 ± 1.4 | < 0.001 | 0.163 |
TAS (°) | 84.7 ± 5.7 | 86.2 ± 4.1 | 0.376 | 80.2 ± 4.6 | 92.1 ± 3.9 | < 0.001 | 0.002 |
TT (°) | 4.5 ± 2.1 | 3.2 ± 1.3 | 0.014 | 6.3 ± 3.4 | 2.8 ± 2.0 | < 0.001 | 0.279 |
TLS (°) | 78.4 ± 3.9 | 81.2 ± 2.5 | 0.179 | 76.2 ± 5.8 | 82.1 ± 6.5 | 0.008 | 0.768 |
Range of motion (ROM) | |||||||
Plantarflexion (°) | 23.3 ± 3.7 | 37.8 ± 4.2 | < 0.001 | 25.1 ± 4.8 | 30.4 ± 3.6 | 0.015 | 0.006 |
Dorsiflexion (°) | 17.5 ± 5.8 | 36.5 ± 6.4 | < 0.001 | 23.8 ± 6.1 | 28.3 ± 5.5 | 0.043 | 0.004 |
Varus (°) | 23.6 ± 6.0 | 32.1 ± 4.5 | 0.007 | 22.7 ± 4.2 | 27.1 ± 3.1 | 0.039 | 0.017 |
Valgus (°) | 19.8 ± 4.1 | 28.4 ± 3.7 | 0.006 | 20.0 ± 3.4 | 25.2 ± 2.8 | 0.011 | 0.046 |