Clinical characteristics of patients with RA.
| Characteristic | Median (range) |
|---|---|
| Disease duration, yrs | 5 (0.2–40) |
| Tender joint count | 5 (0–27) |
| Swollen joint count | 5 (0–26) |
| Patient’s global assessment of disease activity (100-mm VAS) | 36.5 (0–100) |
| DAS28-4ESR | 4.8 (1.5–8.5) |
| CRP, mg/dl | 1.3 (0.1–16.5) |
| ESR, mm/h | 39 (5–130) |
| MMP-3, mg/dl | 155 (31.3–703) |
| RF, mg/dl | 72 (1–1715) |
| Steinbrocker stage, no. | I:25, II:14, III:13, IV:18 |
| Steinbrocker class, no. | 1:23, 2:41, 3:6, 4:0 |
VAS: visual analog scale; DAS28: 28-joint count disease activity score; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; MMP-3: matrix metalloproteinase-3; RF: rheumatoid factor.