[R-meta] formula of variance of mean effect from a RE model with 1/vi with weights
Yefeng Yang
ye|eng@y@ng1 @end|ng |rom un@w@edu@@u
Mon Apr 24 11:01:15 CEST 2023
Dear Wolfgang,
Brilliant! The general form looks quite complex: Var[b] = (X'WX)^-1 X'W Var[y] WX (X'WX)^-1.
If we do not consider predictor analysis (i.e., intercept-only MA model), can I bother you to reformulate it using non-matrix notation? I appreciate it!
Best,
Yefeng
________________________________
From: R-sig-meta-analysis <r-sig-meta-analysis-bounces using r-project.org> on behalf of Yefeng Yang via R-sig-meta-analysis <r-sig-meta-analysis using r-project.org>
Sent: Monday, 24 April 2023 18:38
To: r-sig-meta-analysis using r-project.org <r-sig-meta-analysis using r-project.org>
Cc: Yefeng Yang <yefeng.yang1 using unsw.edu.au>
Subject: [R-meta] formula of variance of mean effect from a RE model with 1/vi with weights
Dear experts,
I see the rma() in metafor package can run a random-effects meta-analysis with inverse sampling variance (say vi) as weights (setting weights = 1/vi). I wonder about the formula used to calculate the variance (or standard error) of the overall mean in this model. I would be grateful if someone can provide the corresponding estimator.
Best
Yefeng Yang PhD
UNSW, Sydney
[[alternative HTML version deleted]]
_______________________________________________
R-sig-meta-analysis mailing list @ R-sig-meta-analysis using r-project.org
To manage your subscription to this mailing list, go to:
https://stat.ethz.ch/mailman/listinfo/r-sig-meta-analysis
[[alternative HTML version deleted]]
More information about the R-sig-meta-analysis
mailing list