| | Between-group difference (all patients) | Difference detailed into subgroup (osseous operation type: not same) | Difference detailed into subgroup (osseous operation type: same) | Internal difference of OAF group (osseous operation type: not same) |
|---|
| AAF (n = 17) | OAF (n = 26) | P | AAF (n = 17) | COO (n = 15) | P | AAF (n = 17) | SOO (n = 11) | | COO (n = 15) | SOO (n = 11) | P |
|---|
| Etiology (No. and %) |
| Osteoarthritis | 7 (41.2%) | 2 (7.7%) | 0.008 | 7 (41.2%) | 0 | 0.005 | 7 (41.2%) | 2 (18.2%) | 0.203 | 0 | 2 (18.2%) | 0.086 |
| Post-trauma arthritis (fracture) | 3 (17.6%) | 11 (42.3%) | 0.092 | 3 (17.6%) | 7 (46.7%) | 0.077 | 3 (17.6%) | 4 (36.4%) | 0.264 | 7 (46.7%) | 4 (36.4%) | 0.599 |
| Posttrauma arthritis (ligament lesions) | 5 (29.4%) | 1 (3.8%) | 0.018 | 5 (29.4%) | 0 | 0.022 | 5 (29.4%) | 1 (9.1%) | 0.201 | 0 | 1 (9.1%) | 0.234 |
| Infectious arthritis | 2 (11.8%) | 2 (7.7%) | 0.653 | 2 (11.8%) | 1 (6.7%) | 0.621 | 2 (11.8%) | 1 (9.1%) | 0.823 | 1 (6.7%) | 1 (9.1%) | 0.819 |
| Rheumatoid arthritis | 0 | 2 (7.7%) | 0.242 | 0 | 0 | NS | 0 | 2 (18.2%) | 0.068 | 0 | 2 (18.2%) | 0.086 |
| Urarthritis | 0 | 1 (3.8%) | 0.413 | 0 | 0 | NS | 0 | 1 (9.1%) | 0.206 | 0 | 1 (9.1%) | 0.234 |
| Talus necrosis | 0 | 4 (15.4%) | 0.038 | 0 | 4 (26.7%) | 0.023 | 0 | 0 | NS | 4 (26.7%) | 0 | 0.026 |
| Clubfoot | 0 | 2 (7.7%) | 0.242 | 0 | 2 (13.3%) | 0.120 | 0 | 0 | NS | 2 (13.3%) | 0 | 0.128 |
| Charcot arthritis | 0 | 1 (3.8%) | 0.413 | 0 | 1 (6.7%) | 0.279 | 0 | 0 | NS | 1 (6.7%) | 0 | 0.288 |
- AAF arthroscopic ankle fusion group, OAF open ankle fusion group (demographic composition: OAF = COO + SOO), COO complex osseous operation, SOO simple osseous operation. P P values: α = 0.05 (Chi-squared test)
