-----Original Message-----
From: Dr. Gerta R?cker [mailto:ruecker at imbi.uni-freiburg.de]
Sent: Wednesday, 02 February, 2022 11:33
To: Viechtbauer, Wolfgang (SP); Gladys Barragan-Jason; R meta
Subject: Re: [R-meta] Meta-analysis of meta-analyses
Dear all,
But you could easily identify the overlapping studies, couldn't you? Why
not simply do a first-order meta-analysis of the union set of all
studies found?
(Another, much more intricate problem is overlap between participants of
different studies ...)
Best,
Gerta
Am 02.02.2022 um 11:03 schrieb Viechtbauer, Wolfgang (SP):
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 at r-project.org]
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
gather the number of studies, average effect size and number of participants
is it more appropriate to simply do a systematic review of meta-analyses to
a summary of a specific question/field.
Best wishes,
Gladys
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Gladys Barragan-Jason, PhD.??Website?/?Site web
Station d'Ecologie Th?orique et Exp?rimentale (SETE)
CNRS de Moulis