Search Archives
Search tips
from:Name
Search by author name, e.g. from:Duncan Murdoch
"exact phrase"
Match an exact phrase
word1 word2
Match messages containing both words
Date range
Use the date pickers to filter results to a time period
Use the list dropdown to narrow results to a specific mailing list. Combine from: with other terms to filter by author and content.
Hi I want to perform a meta-analysis of the relation between the outcome and key explanatory variables expressed as regression coefficients. As a rule, authors report several models with different specifications. I wonder which regression coefficients should I collect...
Dear list members, This is my code for a forest plot. plot(forest(res, xlab="Log odds ratio", mlab="", cex=1.8, slab=paste(wb$Name), psize=1, header="Publication", xlim = c(-2.48, 4.0), ylim = c(-1.5...
Dear experts, In my sample of articles for meta-analysis there are three categories, or three conditions, that may influence the effect of interest. I am more interested in estimating different effects from these conditions than in explaining heterogeneity in...
Dear list members, We are conducting several meta-analyses using the metafor package in R (Viechtbauer 2010) because of 3-level data structure, followed by sandwich-type estimator with a small-sample adjustment to get cluster robust standard errors. There...
Awesome, thanks! On Thu, Dec 17, 2020 at 3:53 PM Viechtbauer, Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl> wrote: > Dear Valeria, > > Try adding at=c(-1, 0, 1, 5, 10) or wherever you would like axis marks. > > You also...
Dear colleagues, I do 3-level meta-analysis with a small number of studies and a small number of clusters. 1st level - model, 2nd level - study, 3rd level - database. The effect I am interested in can be specified in different...
Michael, Christian, Thank you! I have just 30 effects in three groups, so the results between two options are indeed very different. Thank you for explaining what is right and why :) Best, Valeria On Mon, Dec 14, 2020 at 10...
Thank you ! On Thu, Dec 3, 2020 at 11:04 AM Viechtbauer, Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl> wrote: > Dear Valeria, > > You can use conf_int() from clubSandwich to get CIs. > > As for detecting outliers: I am not aware...
Dear Gerta, Thank you so much for the references! Best, Valeria On Sat, Dec 12, 2020 at 5:41 PM Dr. Gerta R?cker < ruecker at imbi.uni-freiburg.de> wrote: > Dear Valeria, > > You find discussion of these issues in...
Michael, Wolfgang, Thank you! This list is a huge help Best, Valeria On Sat, Dec 12, 2020, 00:04 Viechtbauer, Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl> wrote: > Just want to add to this an answer to question 5. > > robust...
Dear Michael and Wolfgang. at the end of Egger's regression / funnel plot thread, Wolfgang said: "To what extent such a plot is indicative of publication bias / small study effects is a different issue" Could you please say more on...
Dear Wolfgang, Thank you VERY much! Thank you for correcting my code -- indeed, random effect on the 1st level is totally needed! A couple more questions, if I may 1. There are too little cases for such a complex data...
Dear James, Thank you! Attached are the code and the database. And here is some results > summary(based_inf) Multivariate Meta-Analysis Model (k = 17; method: REML) logLik Deviance AIC BIC AICc -14.2991 28.5983 34.5983 36.9161...
Hi James You have perfectly described my problem of model selection: while the dependent variable and key predictors are the same, sets of control variables are different -- within each paper as well as between papers. You ask two questions at...
Can't find what you're looking for? Try searching with Google .