Figure 2.
Panels A and B. Random-effects estimates and 95% confidence intervals (CI) of gastric cancer relative risk (RR) associated with (A) years of fertility (highest vs. lowest category) and (B) hormone replacement therapy (ever vs. never). Study-specific RRs are shown as squares, with the size of the symbol inversely proportional to the study-specific variance. Pooled RRs are shown as diamonds, with the middle corresponding to the point estimate and the width representing the 95% CI.
Panels C and D. Begg’s funnel plots with pseudo 95% CIs for gastric cancer RRs associated with (C) years of fertility and (D) hormone replacement therapy.