Patient demographics and baseline clinical variables.
| Responders | Nonresponders | P | |
|---|---|---|---|
| N | 24 | 18 | 1 |
| Females, % | 100 | 100 | 1 |
| Age, yrs | 60.4 (14.5) | 54.6 (11.5) | 0.782 |
| Weeks of polyarthritis | 23.9 (19.0) | 40.2 (69.5) | 0.432 |
| ACPA, % positive | 75 | 52.9 | 0.189 |
| Rheumatoid factor, % positive | 91.7 | 44.4 | 0.001 |
| DAS28-ESR | 5.7 (1.1) | 5.6 (1.3) | 0.997 |
| Swollen 28-joint count | 9.7 (5.7) | 10.0 (7.5) | 0.989 |
| Tender 28-joint count | 11.9 (6.5) | 15.5 (8.6) | 0.863 |
| CRP, mg/L | 25.5 (22.8) | 13.3 (21.1) | 0.557 |
| ESR, mm/h | 39.5 (30.7) | 25.3 (15.0) | 0.496 |
| White cell count, 1 × 106 cells/mL | 8.6 (2.6) | 7.4 (3.8) | 0.956 |
Values are expressed as mean (SD) unless otherwise indicated. ACPA and RF positivity analyzed with Fisher exact test. All other variables analyzed with Student t test. ACPA: anticitrullinated protein antibody; CRP: C-reactive protein; DAS28: Disease Activity Score in 28 joints; ESR: erythrocyte sedimentation rate; RF: rheumatoid factor.