Funnel plots are commonly used to investigate publication and related biases in meta-analysis. Although asymmetry in …, confounding factors such as differential study quality. Funnel plots can be enhanced by adding contours of statistical … enhancement to funnel plots should be used routinely for meta-analyses where it is possible that results could be suppressed on …

Funnel plots are a visual tool for investigating publication and other bias in meta-analysis. They are simple … publication probability with the statistical significance of study results) may lead to asymmetrical funnel plots. It is, however …, important to realize that publication bias is only one of a number of possible causes of funnel-plot asymmetry-funnel plots …