Biomarkers present in sera of 100 Norwegian children with recent-onset juvenile idiopathic arthritis (JIA) and 58 healthy children.
| JIA, n = 100 (%) | Healthy Children, n = 58 (%) | |
|---|---|---|
| E-ANA-positive | 4 (4) | 0 (0) |
| IF-ANA screen-positive | 68 (68) | 7 (12.1) |
| IF-ANA titer ≥ 80 | 57 (57) | 3 (5.2) |
| IF-ANA titer ≥ 320 | 34 (34) | 3 (5.2) |
| Histone IgM/IgG ≥ 30 U/ml | 6 (6) | 1 (1.7) |
| Histone IgM/IgG ≥ 15 U/ml | 10 (10) | 4 (6.9) |
| Histone IgM/IgG ≥ 8 U/ml | 44 (44) | 12 (20.7) |
| Histone IgG ≥ 5.5 U/ml | 42 (42) | 15 (25.9) |
ANA: antinuclear antibodies; IF: immunofluorescence.