Table 2.

Incidence Rates (IR) of serious infections by infection subtype among children with systemic lupus erythematosus and lupus nephritis enrolled in Medicaid, 2000–2006

	Systemic Lupus Erythematosus Person Years (PY) = 10,108		Lupus Nephritis Person Years (PY) = 3,536
	N events	IR per 100PY (95% CI)	N events	IR per 100PY (95% CI)
All infections	1,053	10.42 (9.80, 11.07)	624	17.65 (16.29, 19.09)
Bacterial	917	9.07 (8.49, 9.68)	535	15.13(13.88, 16.47)
Viral	116	1.15 (0.95, 1.38)	76	2.15 (1.69, 2.69)
Fungal	14	0.14 (0.08, 0.23)	—	—

Incidence rates (IR) are reported per 100 person years (PY).

— Cell counts of 10 or fewer individuals have been suppressed due to Federal reporting requirements.