Figure 2.
Meta-analysis of the association of Helicobacter pylori with non-cardia gastric cancer in the China Kadoorie Biobank study and three published studies using the same immunoblot assay
The combined estimate is an inverse-variance weighted average. The black squares represent RR, with the area inversely proportional to the variance of the log RR, and the horizontal lines represent their corresponding 95% CIs. The dotted vertical line indicates the overall RR, and the black diamond indicates it and its 95% CI. pheterogeneity denotes the p value for heterogeneity across the four studies. RR=relative risk.