Fig. 9. Funnel plots of standard error (study precision) vs. mean difference (effect size) for low-density-lipoprotein cholesterol concentrations for evaluating publication bias. A symmetrical inverted funnel indicates the absence of publication bias.

Prev Nutr Food Sci 2023;28:377~385 https://doi.org/10.3746/pnf.2023.28.4.377