Figure 4. Odds ratios (ORs) for associations between IL-8 -251 A/T SNP and gastric cancer risk with different H pylori infection status.

H pylori infection status includes H pylori positive cases versus positive controls and H pylori negative cases versus negative controls. The sizes of the squares indicate the relative weight of each study. Bars, 95% confidence interval (CI). A) The IL-8 -251 AA genotype versus TT genotype; B) The IL-8 -251 AA genotype versus TA genotype.