Main patient characteristics at biologic treatment onset. All values are median value.
| No. patients, sex ratio (male/female) | 100; 33/67 |
| Type of JIA, no. patients | |
| Systemic-onset | 29 |
| Polyarthritis (RF+/RF−) | 36 (3/33) |
| Oligoarthritis (persistent/extended) | 27 (9/18) |
| Enthesitis-related JIA (HLA-B27±) | 8 (5/3) |
| Age at disease onset, yrs (range) | 4.26 (0.69 to 13.72) |
| Age at biologic treatment onset, yrs (range) | 7.11 (1.58 to 15.68) |
| JIA duration, yrs (range) | 1.78 (0.18 to 11.14) |
| Height, cm (range) | 119 (80 to 177.5) |
| Height, SD (range) | −0.24 (−3.63 to 2.9)* |
| Active disease (no. patients) | 45 |
| Elevated (> 1/40) antinuclear antibodies (no. patients) | 36 |
| Uveitis (no. patients) | 22 |
| Previous steroid treatments | |
| No. patients | 46 |
| Age at onset, yrs (range) | 5.0 (0.9 to 13.4) |
| Previous nonbiologic DMARD | |
| No. patients | 72 |
| Age at onset, yrs (range) | 5.9 (1.2 to 15.5) |
↵* Height (SD) at disease onset was 0.31 (−2.47 to 5.46) with a mean of 0.41 (± 1.13). JIA: juvenile idiopathic arthritis; RF: rheumatoid factor; DMARD: disease-modifying antirheumatic drug.