Message-ID: <020150f4-d41c-6dd1-9c31-bf3b8fdf1073@imbi.uni-freiburg.de>
Date: 2022-02-02T10:32:42Z
From: Gerta Ruecker
Subject: [R-meta] Meta-analysis of meta-analyses
In-Reply-To: <b5c54a1cd84d4b3eb905991a47f2f9d3@UM-MAIL3214.unimaas.nl>
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.
>
> Best,
> Wolfgang
>
>> -----Original Message-----
>> From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces at 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
>>
>> --
>> ------------------------------------------
>> Gladys Barragan-Jason, PhD.??Website?/?Site web
>> Station d'Ecologie Th?orique et Exp?rimentale (SETE)
>> CNRS de Moulis
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--
Dr. rer. nat. Gerta R?cker, Dipl.-Math.
Guest Scientist
Institute of Medical Biometry and Statistics,
Faculty of Medicine and Medical Center - University of Freiburg
Zinkmattenstr. 6a, D-79108 Freiburg, Germany
Mail: ruecker at imbi.uni-freiburg.de
Homepage: https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker