Figure 3.

Forest plot for the analysis of all comparisons examining the effects of portion control tools on portion size awareness using random-effects meta-analysis. Contributing comparisons are represented by a filled square with horizontal lines, where the area of the square depicts the contribution of the study to the full analysis, and the horizontal lines indicate the 95% CIs for each study. Studies displaced to the left of a 0 line demonstrate a finding in favor of the tool not improving portion size learning or awareness, whereas those to the right demonstrate a finding in favor of the tool enhancing portion size learning or awareness. The diamond at the base of the plot represents the combined effect (Standardized Mean Difference) with 95% CIs.