[R-meta] Q-Statistic for Between-Subgroup Heterogeneity

[Viechtbauer, Wolfgang (SP)]

Good point. This was discussed before (for metagen(), but it's the same issue):

https://stat.ethz.ch/pipermail/r-sig-meta-analysis/2017-December/000430.html

Best,
Wolfgang

-----Original Message-----
From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces using r-project.org] On Behalf Of Guido Schwarzer
Sent: Monday, 16 July, 2018 13:13
To: r-sig-meta-analysis using r-project.org
Subject: Re: [R-meta] Q-Statistic for Between-Subgroup Heterogeneity

Am 13.07.18 um 18:31 schrieb Viechtbauer, Wolfgang (SP):

> [...]
> In the output, you will find:
>
> Test of Moderators (coefficients 2:3):
> QM(df = 2) = 1.7675, p-val = 0.4132
>
> This is the test for between-subgroup heterogeneity.

... assuming a common between-study variance tau2 across subgroups. The 
default in metaprop() of meta is to allow different between-study 
variances (analogous to RevMan 5, the software for Cochrane Reviews). 
However, this can be changed using argument 'tau.common = TRUE' in 
metaprop().

As stated by Ty, metaprop() does not allow to specify the weights at the 
moment. I put this on my TODO list.

Best wishes,
Guido