Friday, April 24, 2020

Funnel Plot

-also called as Begg’s plot
-type of scatter plot
-used to examine biases in meta-analyses

An ideal funnel plot is symmetric.
If no biases, 95% of studies lie within the triangle.

Causes of asymmetry:

1. Publication bias - most common
2. Study heterogeneity
3. Methodological anomaly
4. Artifact
5. Chance

Written by Devi Bavishi


1. Bradburn, S. (2020). What Is A Funnel Plot And How To Read Them?. Retrieved 15 April 2020, from
2. Sterne, J., Sutton, A., Ioannidis, J., Terrin, N., Jones, D., & Lau, J. et al. (2011). Recommendations for examining and interpreting funnel plot asymmetry in meta-analyses of randomised controlled trials. BMJ343(jul22 1), d4002-d4002. doi: 10.1136/bmj.d4002

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