Table 1 The table shows the American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot scoring system that was used in the current study. Patients were given this questionnaire preoperatively and postoperatively to evaluate subjective and objective outcomes
From: Arthroscopic arthrodesis for ankle arthritis without bone graft
Parameter | Points |
|---|---|
Pain (40 points) | |
None | 40 |
Mild | 30 |
Moderate | 20 |
Severe | 0 |
Function (50 points) | |
Activity limitations | |
None | 10 |
Limitations on recreational activities | 7 |
Some limitations on daily and recreational activities | 4 |
Severe limitations on daily and recreational activities | 0 |
Maximum continuous walking distance | |
600 m or more | 5 |
400 m to less than 600 m | 4 |
100 m to less than 400 m | 2 |
Less than 100 m | 0 |
Walking surfaces | |
No difficulty on any surface | 5 |
Some difficulty on uneven terrain, stairs, and inclines | 3 |
Severe difficulty or inability to walk on uneven terrain, stairs, and inclines | 0 |
Gait abnormality | |
None or slight | 8 |
Obvious (walking possible but gait abnormality obvious) | 4 |
Marked (walking difficult and gait abnormality obvious) | 0 |
Sagittal motion (flexion plus extension) | |
Normal or mild restriction (30° or more) | 8 |
Moderate restriction (15°–29°) | 4 |
Severe restriction (less than 15°) | 0 |
Hindfoot motion (inversion plus eversion) | |
Normal or mild restriction (75–100% normal) | 6 |
Moderate restriction (25–74% normal) | 3 |
Severe restriction (less than 25% normal) | 0 |
Ankle-hindfoot stability (anterior drawer, varus-valgus stress) | |
Stable | 8 |
Unstable | 0 |
Alignment (10 points) | |
Good, plantigrade foot, well aligned | 10 |
Fair, plantigrade foot, mild to moderate degree of malalignment | 5 |
Poor, nonplantigrade foot, severe malalignment | 0 |