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<p>Dear Carla,</p>
<p>I discussed the check for zero treatment arm variances with
Gerta. We realized that we have been overcautious with respect to
zero treatment arm variances which can happen in real live (as
your example nicely shows). We changed the behaviour of netmeta()
such that a warning instead of an error is triggered for zero
treatment arm variances (similar to the warning for re-ordering of
treatment arms).<br>
</p>
<p>This change is implemented in the development version of <b>netmeta</b>
available on GitHub:</p>
install.packages("devtools")<br>
devtools::install_github("guido-s/netmeta", ref = "develop")
<p><br>
</p>
<p>In your second example, treatment effects are inconsistent as you
missed a minus sign for the comparison exotic.forest vs
forest.harvested (see attached R code). ;-)<br>
</p>
Best wishes,<br>
Guido<br>
<pre class="moz-signature" cols="72">--
Dr. Guido Schwarzer (<a class="moz-txt-link-abbreviated" href="mailto:sc@imbi.uni-freiburg.de">sc@imbi.uni-freiburg.de</a>)
Institute for Medical Biometry and Statistics
Stefan-Meier-Str. 26, D-79104 Freiburg | Phone: +49 (0)761 203 6668
<a class="moz-txt-link-freetext" href="http://www.imbi.uni-freiburg.de">http://www.imbi.uni-freiburg.de</a> | Fax: +49 (0)761 203 6680
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