[R-meta] Mismatch between output from sub-group analysis and forest plot

Guido Schwarzer @c @end|ng |rom |mb|@un|-|re|burg@de
Fri Feb 14 18:12:50 CET 2020

Am 14.02.20 um 17:05 schrieb Joao Afonso:
> [...]
> A final question if you don't mind.
> I have the same overall pooled estimate ("Prevalence of Lameness in
> British Dairy Cattle") in all forest plots I have produced while
> conducting sub-group analysis on the different moderators. Yet all the
> overall pooled estimates I get in the console are different from the
> corresponding plot. [...]

In R package *meta* the overall pooled estimate in a meta-analysis with 
subgroups always comes from the (same) meta-analysis including all 
studies, i.e.,

m4 = rma(yi, vi, data = ies.da, method = "DL")
predict(m4, transf = transf.ipft.hm,
         targ = list(ni = prevalence_2020_cow_nomv$ssizeanimal))

Best wishes, Guido

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