[R-meta] Impact of very high tau-square value.
j|deogbu @end|ng |rom y@hoo@com
Wed Jun 26 09:32:20 CEST 2019
I did a random effect meta-analysis using the metafor package and I obtained a tau-squared ( heterogeneity) value greater than 1.
I was worried because I am nit sure what to make of it; so I did the same analysis under the Bayesian framework. I also obtained a tau-squared value of about 32.8.
I find it confusing, for one it is quite high and secondly I hadn't come across any discussion on how high the tau-squared value could get.
My questions are:
How high can the tau-squared value be?
Secondly, under this situation can I go ahead and interpret my result but with a warning on the amount of heterogeneity present in the study? Or does the high value of the tau-square make non-sense of my analysis?
Thanks in advance for your response.
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