Demographic and clinical features of the 148 study patients.
| Features | No. Tested | No. (%) | Median | Lower Quartile | Upper Quartile |
|---|---|---|---|---|---|
| Boys | 148 | 47 (31.8) | |||
| Girls | 148 | 101 (68.2) | |||
| ILAR category | 148 | ||||
| Systemic arthritis | 45 (30.4) | ||||
| Rheumatoid factor-negative polyarthritis | 42 (28.4) | ||||
| Rheumatoid factor-positive polyarthritis | 4 (2.7) | ||||
| Oligoarthritis extended | 39 (26.4) | ||||
| Psoriatic arthritis | 3 (2.0) | ||||
| Enthesitis-related arthritis | 9 (6.1) | ||||
| Undifferentiated arthritis | 6 (4.0) | ||||
| Age at disease onset, yrs | 148 | 4.0 | 2.3 | 7.5 | |
| Interval from onset to baseline radiograph, yrs | 148 | 1.3 | 0.4 | 4.1 | |
| CARSH score | |||||
| Baseline | 148 | 0 | 0 | 0 | |
| Time 1 | 84 | 0 | 0 | 4 | |
| Time 2 | 52 | 2 | 0 | 6 | |
| Time 3 | 36 | 4 | 0 | 8 |
CARSH: Childhood Arthritis Radiographic Score of the Hip; ILAR: International League of Associations for Rheumatology.