Baseline characteristics of patients with arthralgia and positive anticitrullinated antibodies (ACPA) or IgM rheumatoid factor (RF).
| Characteristic | Total, n = 137 |
|---|---|
| Female sex, n (%) | 104 (76) |
| Age, median (IQR), yrs | 47 (39–55) |
| Followup, median (IQR), mo | 21 (15–31) |
| Progression to arthritis, n (%) | 35 (26) |
| Time to arthritis, median (IQR), mo | 11 (3.7–18) |
| Tender joint count = 53, median (IQR) | 0 (0–2) |
| RF-positive, n (%) | 82 (60) |
| ACPA-positive, n (%) | 94 (69) |
| RF + ACPA positive, n (%) | 39 (29) |
IQR: interquartile range.