Baseline characteristics of the 20 patients with rheumatoid arthritis included in the exercise.
| Female, n (%) | 15 (75) |
| Age, yrs, median (25th and 75th percentile) | 55 (41;63) |
| Disease duration, days, median (25th and 75th percentile) | 87 (36;136) |
| IgM RF positivity, n (%) | 9 (45) |
| Anti-CCP positivity, n (%) | 12 (60) |
| DAS28, median (25th and 75th percentile) | 3.78 (3.30;4.72) |
| ESR, mm/h, median (25th and 75th percentile) | 12 (10;21) |
| 28-joint swollen joint count, median (25th and 75th percentile) | 5.5 (4;10) |
IgM RF: immunoglobulin M rheumatoid factor; CCP: cyclic citrullinated protein; DAS: Disease Activity Score; ESR: erythrocyte sedimentation rate.