[R-meta] Fwd: Overlapping CIs with significant difference among subgroups

[Rafael Rios Moura]

Dear Wolfgang and All,

Few months ago, I sent this email about a result obtained from a mixed
effects MLMA, controlling for phylogenetic non-independence. I tested the
difference between two levels of a moderator and obtained two close means
(0.39 and 0.31) with highly overlapping CIs. However, the omnibus test
detected a difference between estimates. Could it be a problem with my code
or the test? Or am I not using the "predict" function correctly? My dataset
and script are attached. I am grateful for contributions.

Best wishes,
_______________________________________________________

*Prof. Dr. Rafael Rios Moura*

*scientia amabilis *
Coordenador de Pesquisa e do NEPEE/CNPq
UEMG - Unidade Ituiutaba

ORCID: http://orcid.org/0000-0002-7911-4734
Currículo Lattes: http://lattes.cnpq.br/4264357546465157
<http://orcid.org/0000-0002-7911-4734>
<http://lattes.cnpq.br/4264357546465157>
<http://lattes.cnpq.br/4264357546465157>Research Gate:
https://www.researchgate.net/profile/Rafael_Rios_Moura2
<http://orcid.org/0000-0002-7911-4734>
Rios de Ciência: https://www.youtube.com/channel/UCu2186wIJKji22ai8tvlUfg
<http://orcid.org/0000-0002-7911-4734>


---------- Forwarded message ---------
De: Rafael Rios <biorafaelrm using gmail.com>
Date: seg., 1 de jun. de 2020 às 16:53
Subject: Overlapping CIs with significant difference among subgroups
To: <r-sig-meta-analysis using r-project.org>, Viechtbauer Wolfgang (SP) <
wolfgang.viechtbauer using maastrichtuniversity.nl>


Dear Wolfgang and All,

I conducted a multilevel mixed-effects meta-analysis and found differences
between levels of two moderators. I was expecting to find non-overlapped
confidence intervals. However, I obtained overlapped confidence intervals
for all subgroups. How can I interpret these results? In such situation,
should I trust in the Q-test or in the CIs? I controlled for phylogenetic
non-independence. Is there a chance of this approach affect the estimation
of CIs using predict function? My dataset and script are attached.

Best wishes,
_______________________________________________________

*Prof. Dr. Rafael Rios Moura*
Coordenador de Pesquisa e do NEPEE/CNPq
Laboratório de Ecologia e Zoologia (LEZ)
UEMG - Unidade Ituiutaba

ORCID: http://orcid.org/0000-0002-7911-4734
Currículo Lattes: http://lattes.cnpq.br/4264357546465157
<http://orcid.org/0000-0002-7911-4734>
<http://lattes.cnpq.br/4264357546465157>
<http://lattes.cnpq.br/4264357546465157>Research Gate:
https://www.researchgate.net/profile/Rafael_Rios_Moura2
<http://orcid.org/0000-0002-7911-4734>
Rios de Ciência: https://www.youtube.com/channel/UCu2186wIJKji22ai8tvlUfg
<http://orcid.org/0000-0002-7911-4734>

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