The area of each square is proportional to the study's weight in the meta-analysis. The overall meta-analysed measure of effect is often represented on the plot as a dashed vertical line. This meta-analysed measure of effect is commonly plotted as a diamond, the lateral points of which indicate confidence intervals for this estimate.
The area of each square corresponds to the study's influence in the meta-analysis. The overall measure of effect from the meta-analysis is often displayed on the graph as a vertical dashed line. This combined effect size is typically depicted as a diamond, with its sides indicating the range of plausible values for this estimate.