What is a funnel plot in research?
A funnel plot is a graphical representation used to detect bias in research studies, particularly in meta-analyses.
How do you interpret a funnel plot?
In a funnel plot, studies are plotted based on their effect sizes and sample sizes. A symmetrical shape suggests no bias, while asymmetry may indicate publication bias.
What does it mean if the funnel plot is asymmetrical?
Asymmetry in a funnel plot may suggest that smaller studies with negative results are missing, indicating potential publication bias.
Can you give an example of when to use a funnel plot?
Funnel plots are commonly used in meta-analyses to assess the presence of publication bias among the included studies.
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