Table 2.

Systemic lupus erythematosus (SLE) incidence in patients with Helicobacter pylori (HP) infection and controls.

	Control (n = 83,302)	HP-infected group (n = 41,651)
Follow-up person-months	8,323,634	4,275,515
New SLE case	60	50
Incidence rate* (95% CI)	0.72 (0.56–0.93)	1.17 (0.89–1.54)
Crude relative risk (95% CI)	Reference	1.63 (1.12–2.37)

^*Incidence rate per 100,000 person-months.