Table 1 Distribution of gender, age at disease onset, and disease duration in 266 patients with JIA allocated to the ILAR categories
Total | Systemic | Persistent oligo | Extended oligo | RF-negative polyarthritis | RF-positive polyarthritis | Psoriatic | ERA | Other arthritis | |
|---|---|---|---|---|---|---|---|---|---|
n (% girls) | 266 (76) | 5 (40) | 97 (77) | 38 (82) | 68 (81) | 15 (93) | 25 (76) | 5 (40) | 13 (38) |
Onset age, mean, 25/75th percentile yrs | 7.1 (3.0/10.7) | 3.3 (2.1/3.9) | 6.1 (2.2/9.5) | 5.7 (2.6/8.1) | 7.4 (3.5/10.6) | 11.9 (9.9/14.4) | 8.8 (5.0/12.9) | 11.1 (10.1/12.5) | 9.5 (7.3/11.7) |
Mean disease duration at study visit, 25/75th percentile yrs | 2.9 (0.4/5.4) | 4.8 (0.6/7.1) | 2.5 (0,3/4,3) | 4.2 (0.7/7.6) | 2.7 (0.4/4.2) | 0.8 (0.2/1.7) | 3.0 (0.4/5.9) | 1.2 (0.4/1.1) | 3.5 (0.7/5.8) |