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[R-meta] Threshold values for Cook's Distances and DFBETAS

Thölking, Theresa 
Hello everybody,


I am trying to apply the outlier and influence diagnostics as described by Viechtbauer and Cheung (2010) on a meta-analysis I conducted, using a four-level random-effects model with 528 included effect sizes. I have calculated the Cook's Distances and DFBETAS in R, using the functions for model diagnostics for rma.mv objects as described here: https://wviechtb.github.io/metafor/reference/influence.rma.mv.html


However, I don't know how to decide about which studies are influential based on these values. I read the paper by Viechtbauer and Cheung, but I don't quite understand it. Is there some kind of formula to determine the threshold values of CD and DFBETAS for a meta-analytic model with k outcomes? Thanks in advance for your help.


Best,

Theresa

Thread (4 messages)

Thölking, Theresa Threshold values for Cook's Distances and DFBETAS Sep 29 Michael Dewey Threshold values for Cook's Distances and DFBETAS Sep 30 Wolfgang Viechtbauer Threshold values for Cook's Distances and DFBETAS Sep 30 Thölking, Theresa Threshold values for Cook's Distances and DFBETAS Sep 30