Table 2.

Odds ratios (OR) for development of chronic asymptomatic uveitis in 100 Norwegian children with recent-onset juvenile idiopathic arthritis (JIA), based on analyses of clinical and biological characteristics.

	Uveitis, n = 16	Non-uveitis, n = 84	OR (95% CI)
Age at onset of arthritis < 7 yrs	14	44	6.4 (1.4–29.7)^*
ILAR oligoarticular^**	9	41	1.3 (0.5–4.0)
Female	10	61	0.6 (0.2–1.9)
IF-ANA screen-positive^***	14	54	3.9 (0.8–18.3)
IF-ANA titer ≥ 80	13	44	3.9 (1.0–14.8)
IF-ANA titer ≥ 320	11	23	5.8 (1.8–18.6)^*
Histone IgM/IgG ≥ 30 U/ml	4	2	13.7 (2.3–82.9)^*
Histone IgM/IgG ≥ 15 U/ml	5	5	7.2 (1.8–28.9)^*
Histone IgM/IgG ≥ 8 U/ml	13	31	7.4 (2.0–28.0)^*
Histone IgG ≥ 5.5 U/ml	11	31	3.7 (1.2–11.6)^*

↵* Statistically significant, p < 0.05.
↵** Oligoarticular persistent and extended JIA according to the International League of Associations for Rheumatology (ILAR) classification.
↵*** Sera scoring positive on the initial antinuclear antibody (ANA) immunofluorescence screening test titer ≥ 80.