Table 1.

Incidence Rates Per 10,000 Person Years (Unadjusted)

	Thiopurine Monotherapy	Anti-TNFα Monotherapy	Combination Therapy
Serious Infections	105	190	224
Opportunistic Infections	17	21	41
Viral Infections	11	7	13
Bacterial Infections	2	5	11
TNF, tumor necrosis factor.
Adapted from Kirchgesner J et al.7