Hey I am performing af meta-regression of post-operative complications in single-arm studies. I am using the rma.glmm function on logit transformed data (measure ="PLO"). Many of the studies have 0 events - are these studie's proportions removed from the model? In that case, how can i include them? Regards, Daniel Daniel M?nsted Shabanzadeh MD, PhD Department of Gastroenterology, Surgical Unit Hvidovre Hospital Mobile +45 2546 5251
[R-meta] Meta-regression of proportions using rma.glmm
2 messages · Daniel Mønsted Shabanzadeh, Wolfgang Viechtbauer
Dear Daniel, No, studies with 0 events are not removed. To illustrate: library(metafor) xi <- c(0,1,0,0,1,2) ni <- rep(10,6) res <- rma.glmm(measure="PLO", xi=xi, ni=ni) res predict(res, transf=exp) res <- rma.glmm(measure="PLO", xi=xi, ni=ni, subset=xi>0) res predict(res, transf=exp) As you can see, in the second model, the estimate of the odds is much higher, since there I have explicitly thrown out the studies with 0 events. Best, Wolfgang -----Original Message----- From: Daniel M?nsted Shabanzadeh [mailto:dmshaban at gmail.com] Sent: Thursday, 10 October, 2019 10:11 To: Viechtbauer, Wolfgang (SP); r-sig-meta-analysis at r-project.org Subject: Meta-regression of proportions using rma.glmm Hey I am performing af meta-regression of post-operative complications in single-arm studies. I am using the rma.glmm function on logit transformed data (measure ="PLO").?Many of the studies have 0 events - are these studie's proportions?removed from the model? In that?case, how can i include them? Regards, Daniel?? Daniel M?nsted Shabanzadeh MD, PhD Department of Gastroenterology, Surgical Unit Hvidovre Hospital Mobile?+45 2546 5251?