Baseline features of subjects in groups A–C
| Group A | Group B | Group C | |
| Number of subjects | 88 | 72 | 228 |
| Male | 16 | 16 | 40 |
| Mean age (years) | 63 | 66 | 62 |
| Range | (49–73) | (41–79) | (38–83) |
| Female | 72 | 56 | 188 |
| Mean age (years) | 58 | 59 | 62 |
| Range | (17–84) | (29–83) | (20–95) |
| RA disease duration | |||
| Mean (years) | 18 | 19 | 20 |
| Range | (4–57) | (5–50) | (1–55) |
| Baseline articular index | |||
| Mean | 14 | 16.5 | 15 |
| Range | 0–49 | 0–55 | 0–61 |
| HAQ2-150 | |||
| Mean | 1.9 | 1.9 | 1.8 |
| Range | 0.4–3 | 0–3 | 0.1–3 |
| Methotrexate | |||
| Dose (mg) | |||
| Median | 10 | 7.5 | |
| Range | 2.5–25 | 2.5–20 | |
| Duration | |||
| Median | 3 yr | 3 yr | |
| Range | 6 wk–10 yr | 6 wk–7.5 yr | |
↵2-150 HAQ = Health Assessment Questionnaire.