Table 1.
Basic information and preoperative parameters of the two groups
| SMOT (n = 39) | SMOT with FO (n = 24) | P value | |
|---|---|---|---|
| Male/female | 13/26 | 6/18 | 0.484 |
| Age, year | 55.3 ± 9.8 | 56.4 ± 9.1 | 0.658 |
| Left/right | 15/24 | 10/14 | 0.801 |
| Brostrom procedure | 17 | 16 | 0.075 |
| Calcaneal osteotomy | 2 | 2 | 0.632 |
| Takakura stage 2/3a/3b/4 | 7/16/15/1 | 2/9/12/1 | 0.662 |
| Auto-/allograft | 8/31 | 7/17 | 0.434 |
| Follow-up, month | 44.4 ± 20.5 | 49.2 ± 18.9 | 0.357 |
| Preoperative outcomes | |||
| AOFAS score, point | 50.5 ± 11.2 | 48.2 ± 14.4 | 0.481 |
| AOS pain, point | 5.7 ± 0.9 | 5.6 ± 1.0 | 0.683 |
| AOS function, point | 6.1 ± 0.9 | 5.7 ± 1.1 | 0.121 |
| ROM of ankle, degree | 40.1 ± 8.4 | 37.8 ± 9.2 | 0.313 |
| Preoperative radiological parameters | |||
| TAS, degree | 81.8 ± 4.1 | 80.1 ± 3.5 | 0.097 |
| TT, degree | 6.9 ± 4.7 | 7.1 ± 4.9 | 0.872 |
| TMM, degree | 34.4 ± 6.7 | 33.7 ± 5.7 | 0.672 |
| TC, degree | 70.2 ± 3.9 | 68.7 ± 4.3 | 0.159 |
| TLS, degree | 75.2 ± 3.2 | 74.3 ± 3.8 | 0.317 |
| HFAa, degree | 14.8 ± 3.4 | 15.9 ± 5.1 | 0.308 |
| TFCS, mm | 2.9 ± 0.5 | 2.8 ± 0.6 | 0.478 |
| MDT, mm | 6.2 ± 2.0 | 7.2 ± 2.2 | 0.068 |
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