[R-meta] Meta-analysis of meta-analyses

Viechtbauer, Wolfgang (SP) wo||g@ng@v|echtb@uer @end|ng |rom m@@@tr|chtun|ver@|ty@n|
Wed Feb 2 11:03:52 CET 2022

Dear Gladys,

This is sometimes called a 'second-order meta-analysis' or simply 'meta-meta-analysis'. The tricky part is that the different MAs are likely to include overlapping sets of studies, which introduces dependency between the various pooled estimates that is difficult to account for.


>-----Original Message-----
>From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces using r-project.org] On
>Behalf Of Gladys Barragan-Jason
>Sent: Wednesday, 02 February, 2022 10:15
>To: R meta
>Subject: [R-meta] Meta-analysis of meta-analyses
>Dear all,
>I would like to know whether it is possible to make a meta-analysis of meta-
>analysis when several meta-analyses have been done on the same topic if you can
>gather the number of studies, average effect size and number of participants or
>is it more appropriate to simply do a systematic review of meta-analyses to five
>a summary of a specific question/field.
>Best wishes,
>Gladys Barragan-Jason, PhD.  Website / Site web
>Station d'Ecologie Théorique et Expérimentale (SETE)
>CNRS de Moulis

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