Characteristics of healthy children and patients with juvenile idiopathic arthritis (JIA) (n = 87) according to age, sex, onset type, and medical treatment at time of inclusion.
| Age, yrs mean (95% CI) | Sex | Onset Type, no., n = 87 | Medical Treatment, no., n = 84 | |
|---|---|---|---|---|
| JIA | 6.9 (6.0–7.7) | 64 girls, 23 boys | Oligoarticular (64) | MTX (12) |
| ERA (8) | Sulfasalazine (20) | |||
| Polyarticular RF + (2) | Hydroxychloroquine (3) | |||
| Polyarticular RF − (27) | Cyclosporin A (1) | |||
| Systemic (6) | Prednisolone (11) | |||
| Undifferentiated (10) | NSAID (71) | |||
| Healthy children | 9.2 (8.0–10.5) | 19 girls, 19 boys | NA | NA |
NSAID: nonsteroidal antiinflammatory drugs; MTX: methotrexate; RF: IgM rheumatoid factor; ERA: enthesitis-related arthritis, NA: not applicable.