IL1B and gastric ulcer: Interestingly, in our study, the -511 TC/CC and -31 CT/TT IL-1B genotypes were associated with the presence of chronic gastritis and the presence of gastric ulcer when all cases were grouped (-511 TC/CC OR adjusted = 2.8, 95% CI = 1.6-5.1; -31 CT/TT OR adjusted = 2.9, 95% CI = 1.6-5.3).