Table 1 Clinical characteristics of participants in the Nordic JIA cohort at the 17-year follow-up visit
|  | Total cohort N = 293 |
|---|---|
Females, n (%) | 208 (71.0) |
Age at onset, y* | 6.5 ± 4.1 |
Age at follow-up, y* | 23.7 ± 4.4 |
Disease duration, y* | 17.2 ± 1.7 |
ANA positive, n (%) | 89 (30.4) |
HLA-B27 positive, n (%) | 66 (22.5) |
CRP > 10 mg/L, n (%) | 16 (5.4) |
ESR > 20 mm/h, n (%) | 18 (6.1) |
Active joint count, median (IQR) | 0 (0–0) |
Cumulative joints, median (IQR) | 8(4–15) |
JADAS71 ≤ 1, n (%) | 126 (43.0) |
Systemic JIA | 13 (4.4%) |
Oligoarticular persistent | 66 (22.5%) |
Oligoarticular extended | 55 (18.8%) |
Polyarticular RF negative | 53 (18.1%) |
Polyarticular RF positive | 5 (1.7%) |
Psoriatic | 19 (6.5%) |
Enthesitis-related arthritis | 33 (11.3%) |
Undifferentiated | 49 (16.7%) |