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

Viechtbauer, Wolfgang (SP) wolfg@ng@viechtb@uer @ending from m@@@trichtuniver@ity@nl
Mon Jul 16 14:22:03 CEST 2018

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



-----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 

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

Best wishes,

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