[R] interpreting weight in meta-analysis of proportion

petretta at unina.it petretta at unina.it
Wed Apr 16 17:30:29 CEST 2014

Dear all,

I use R 3.0 for Windows.

I performed a meta-analysis of the prevalence (single proportion)  
reported in 14 different studyes using the command:

res<-metaprop(case,n,sm="PFT", comb.fixed=FALSE, comb.random=TRUE,  
studlab<- paste(Study))


A referee ask a brief explanation of the W-statistic reported in the  
results, in particular, why the summ of the individual weights of all  
the studies is 100%.

Any suggestion is welcome.

Mario Petretta
Department of Translational Medical Sciences
Naples University Federico II

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