Table 1. Development of foot deformities in patients with rheumatoid arthritis according to Steinbrocker stage
| Steinbrocker stage | 1 (n=39) | 2 (n=48) | 3 (n=44) | 4 (n=65) |
|---|---|---|---|---|
| Disease duration (y) | 6.9 | 7.6 | 14.5 | 21.8 |
| DAS28-ESR | 2.8 | 3.2 | 3.8 | 3.9 |
| ESR (mm) | 19.5 | 20.3 | 25.5 | 31.4 |
| CRP (mg/dL) | 0.42 | 0.35 | 0.51 | 0.69 |
| HVA (°) | 15.6 | 18.9 | 17.4 | 24.9 |
| M1/M2 angle (°) | 9.5 | 10.5 | 9.7 | 9.4 |
| M1/M5 angle (°) | 29.5 | 29.4 | 30.3 | 29.2 |
| Calcaneal pitch (°) | 19.3 | 18.2 | 16.9 | 15.5 |