plots:contour_enhanced_funnel_plot
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+ | ===== Contour-Enhanced Funnel Plot ===== | ||
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+ | ==== Description ==== | ||
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+ | Below is an example of what is sometimes called a contour-enhanced funnel plot (Peters et al., 2008). Note that the funnel is centered not at the model estimate (as is usually done when drawing funnel plots), but at 0 (i.e., at the value under the null hypothesis of no effect). Various levels of statistical significance of the points/ | ||
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+ | ==== Plot ==== | ||
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+ | {{plots: | ||
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+ | ==== Code ==== | ||
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+ | <code rsplus> | ||
+ | library(metafor) | ||
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+ | ### decrease margins so the full space is used | ||
+ | par(mar=c(5, | ||
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+ | ### fit random-effects model | ||
+ | res <- rma(ai=tpos, | ||
+ | | ||
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+ | ### create contour enhanced funnel plot (with funnel centered at 0) | ||
+ | funnel(res, level=c(90, 95, 99), shade=c(" | ||
+ | </ | ||
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+ | ==== References ==== | ||
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+ | Peters, J. L., Sutton, A. J., Jones, D. R., Abrams, K. R., & Rushton, L. (2008). Contour-enhanced meta-analysis funnel plots help distinguish publication bias from other causes of asymmetry. //Journal of Clinical Epidemiology, | ||
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+ | Sterne, J. A. C., & Egger, M. (2001). Funnel plots for detecting bias in meta-analysis: | ||
plots/contour_enhanced_funnel_plot.txt · Last modified: 2024/04/16 12:20 by Wolfgang Viechtbauer