Dear All, I conducted a mixed-effects model using rma.mv function using metafor package. Now, I want to use trimfill function, but it is not applyied to rma.mv function. Do you know any alternative to conduct this analysis and graphical vizualization? Best wishes, Rafael R. Moura. *scientia amabilis* Doutorando da P?s-gradua??o em Ecologia e Conserva??o de Recursos Naturais Universidade Federal de Uberl?ndia, Uberl?ndia, MG, Brasil ORCID: http://orcid.org/0000-0002-7911-4734 Curr?culo Lattes: http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4244908A8 Research Gate: https://www.researchgate.net/profile/Rafael_Rios_Moura2 <http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4244908A8>
[R-meta] The trim and fill method for rma.mv function
3 messages · Rafael Rios, Viechtbauer Wolfgang (STAT)
13 days later
Dear Rafael, The trim and fill method has not been generalized to more complex models, so this is why this is not available in metafor. It is relatively straightforward though to extend the 'regression test' to more complex models. Simply include some measure of precision of the estimates (e.g., the standard error, the (inverse) sample size) as a predictor/moderator into the model. Best, Wolfgang
Wolfgang Viechtbauer, Ph.D., Statistician | Department of Psychiatry and Neuropsychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com -----Original Message----- From: Rafael Rios [mailto:biorafaelrm at gmail.com] Sent: Tuesday, 17 October, 2017 20:52 To: r-sig-meta-analysis at r-project.org; Viechtbauer Wolfgang (SP) Subject: The trim and fill method for rma.mv function Dear All, I conducted a mixed-effects model using rma.mv function using metafor package. Now, I want to use trimfill function, but it is not applyied to rma.mv function. Do you know any alternative to conduct this analysis and graphical vizualization? Best wishes, Rafael R. Moura. scientia amabilis Doutorando da P?s-gradua??o em Ecologia e Conserva??o de Recursos Naturais Universidade Federal de Uberl?ndia, Uberl?ndia, MG, Brasil ORCID:?http://orcid.org/0000-0002-7911-4734 Curr?culo Lattes:?http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4244908A8 Research Gate:?https://www.researchgate.net/profile/Rafael_Rios_Moura2
Dear Wolfgang, Thank you. I tried the approach that you suggested using the standard error as moderator, and I found a bias in my data set. I removed outliers (i.e. values outside the 95% confidence interval of the funnel plot), but I still found a p<0.05 for the intercept. Then, I decided to removed values outside 90% confidence interval using a contour-enhanced funnel plot and do the meta-analyses. Do you agree with my approach or recommend a different one? Best wishes, Rafael R. Moura. *scientia amabilis* Doutorando da P?s-gradua??o em Ecologia e Conserva??o de Recursos Naturais Universidade Federal de Uberl?ndia, Uberl?ndia, MG, Brasil ORCID: http://orcid.org/0000-0002-7911-4734 Curr?culo Lattes: http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4244908A8 Research Gate: https://www.researchgate.net/profile/Rafael_Rios_Moura2 <http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4244908A8> 2017-10-31 8:17 GMT-02:00 Viechtbauer Wolfgang (SP) < wolfgang.viechtbauer at maastrichtuniversity.nl>:
Dear Rafael, The trim and fill method has not been generalized to more complex models, so this is why this is not available in metafor. It is relatively straightforward though to extend the 'regression test' to more complex models. Simply include some measure of precision of the estimates (e.g., the standard error, the (inverse) sample size) as a predictor/moderator into the model. Best, Wolfgang -- Wolfgang Viechtbauer, Ph.D., Statistician | Department of Psychiatry and Neuropsychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com -----Original Message----- From: Rafael Rios [mailto:biorafaelrm at gmail.com] Sent: Tuesday, 17 October, 2017 20:52 To: r-sig-meta-analysis at r-project.org; Viechtbauer Wolfgang (SP) Subject: The trim and fill method for rma.mv function Dear All, I conducted a mixed-effects model using rma.mv function using metafor package. Now, I want to use trimfill function, but it is not applyied to rma.mv function. Do you know any alternative to conduct this analysis and graphical vizualization? Best wishes, Rafael R. Moura. scientia amabilis Doutorando da P?s-gradua??o em Ecologia e Conserva??o de Recursos Naturais Universidade Federal de Uberl?ndia, Uberl?ndia, MG, Brasil ORCID: http://orcid.org/0000-0002-7911-4734 Curr?culo Lattes: http://buscatextual.cnpq.br/buscatextual/ visualizacv.do?id=K4244908A8 Research Gate: https://www.researchgate.net/profile/Rafael_Rios_Moura2