IL1B and gastric ulcer: Adjusting for age, place of origin, schooling, smoking habits, family history of gastritis or gastric ulcer, and H. pylori infection, TC/CC of IL-1B -511 T>C SNP was significantly associated with ulcer and chronic gastritis together, as compared to controls (OR = 2.9, 95% CI = 1.4-5.8, p = 0.004).