Figure 2. Summary Estimates of Relative Risks (RRs) for Binary Outcomes.
Squares indicate RR estimates, with horizonal lines representing 95% CIs. Diamonds represent pooled estimates, with points indicating 95% CIs. Shaded boxes represent the contribution weight of each study to the meta-analysis. Vertical dashed lines represent the relationship of the 95% CIs around each individual study result with the pooled mean. Weights are from random-effects analysis. A, E, and F, The study by Smith et al32 was not included in the analysis.