Table 1.

Incidence of juvenile idiopathic arthritis in Olmsted County, Minnesota by disease subtype, 1994–2013^*

	Female		Male		Total
Subtype	No.	Incidence per 100,000 (95% CI)†	No.	Incidence per 100,000 (95% CI)†	No.	Incidence per 100,000 (95% CI)‡
Overall	42	12.4 (8.6–16.2)	29	8.3 (5.2–11.3)	71	10.3 (7.9–12.7)
Systemic	2	0.6 (0.0–1.3)	0	0.0	2	0.3 (0.0–0.7)
Oligoarthritis	29	8.5 (5.4–11.6)	16	4.5 (2.3–6.7)	45	6.5 (4.6–8.4)
Polyarthritis	6	1.8 (0.4–3.2)	3	0.9 (0.0–1.9)	9	1.3 (0.5–2.2)
Psoriatic	1	0.3 (0.0–0.9)	1	0.3 (0.0–0.9)	2	0.3 (0.0–0.7)
Enthesitis	0	0.0	1	0.3 (0.0–0.9)	1	0.2 (0.0–0.5)
Undifferentiated	4	1.2 (0.0–2.4)	8	2.3 (0.7–3.8)	12	1.8 (0.8–2.7)

^*95% CI = 95% confidence interval.

^†Age-adjusted to the 2010 US white population.

^‡Age- and sex-adjusted to the 2010 US white 2010 population.