Table 2.
Comparison of the preoperative and last follow-up time functional outcomes and radiological parameters
| SMOT (n = 39) | P value | SMOT with FO (n = 24) | P value | |||
|---|---|---|---|---|---|---|
| Preoperation | Last follow-up | Preoperation | Last follow-up | |||
| Functional outcomes | ||||||
| AOFAS, point | 50.5 ± 11.2 | 79.1 ± 12.4 | 0.000 | 48.2 ± 14.4 | 83.2 ± 10.3 | 0.000 |
| AOS pain, point | 5.7 ± 0.9 | 2.9 ± 1.1 | 0.000 | 5.6 ± 1.0 | 2.6 ± 0.9 | 0.000 |
| AOS function, point | 6.1 ± 0.9 | 3.0 ± 1.3 | 0.000 | 5.7 ± 1.1 | 2.9 ± 1.2 | 0.000 |
| ROM of ankle, degree | 40.1 ± 8.4 | 36.5 ± 4.7 | 0.022 | 37.8 ± 9.2 | 39.3 ± 7.4 | 0.537 |
| Takakura stage 1/2/3a/3b/4 | 0/7/16/15/1 | 26/9/2/2/0 | 0.000 | 0/2/9/12/1 | 19/3/1/1/0 | 0.000 |
| Radiological parameters | ||||||
| TAS, degree | 81.8 ± 4.1 | 89.0 ± 3.3 | 0.000 | 80.1 ± 3.5 | 89.9 ± 2.8 | 0.000 |
| TT, degree | 6.9 ± 4.7 | 2.6 ± 1.4 | 0.000 | 7.1 ± 4.9 | 1.9 ± 0.9 | 0.000 |
| TMM, degree | 34.4 ± 6.7 | 26.5 ± 3.6 | 0.000 | 33.7 ± 5.7 | 28.1 ± 5.5 | 0.001 |
| TC, degree | 70.2 ± 3.9 | 76.9 ± 4.5 | 0.000 | 68.7 ± 4.3 | 78.6 ± 4.1 | 0.000 |
| TLS, degree | 75.2 ± 3.2 | 79.7 ± 2.9 | 0.000 | 74.3 ± 3.8 | 80.9 ± 1.8 | 0.000 |
| HFAa, degree | 14.8 ± 3.4 | 4.1 ± 2.0 | 0.000 | 15.9 ± 5.1 | 2.9 ± 1.4 | 0.000 |
| TFCS, mm | 2.9 ± 0.5 | 4.2 ± 1.1 | 0.000 | 2.8 ± 0.6 | 3.2 ± 0.8 | 0.056 |
| MDT, mm | 6.2 ± 2.0 | 3.1 ± 1.6 | 0.000 | 7.2 ± 2.2 | 1.9 ± 1.7 | 0.000 |
SMOT, Supramalleolar osteotomy; FO, fibular osteotomy; AOFAS, the American Orthopaedic Foot and Ankle Society ankle-hindfoot score; AOS, Ankle Osteoarthritis Scale; ROM, range of motion; TAS, tibial articular surface angle; TT, talar tilt angle; TMM, tibial medial malleolar angle; TC, tibiocrural angle; TLS, tibial lateral surface angle; HFA, hindfoot alignment angle; TFCS, tibiofibular clear space; MDT, medial displacement of talus
aThe case number in SMOT group was 21, and in SMOT with FO group was 17