[R-meta] Fwd: Question on Umbrella review and other types
Yes,I have noted that the word "umbrella" has experienced a change of meaning over the last years. In former times (that is, before network meta-analysis became popular) it meant to conduct a number of pairwise meta-analyses for different treatments for the same condition in the same review. Since this is now better done using network meta-analysis, they now use the term for something different, namely overview of overviews, and this is what the original poster meant. As I understand, in the described situation, a re-analysis is planned, thus I am not sure whether a special R package is needed. Best, Gerta UNIVERSIT?TSKLINIKUM FREIBURG Institute for Medical Biometry and Statistics Dr. Gerta R?cker Guest Scientist Stefan-Meier-Stra?e 26 ? 79104 Freiburg gerta.ruecker at uniklinik-freiburg.de https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker -----Urspr?ngliche Nachricht----- Von: Michael Dewey <lists at dewey.myzen.co.uk> Gesendet: Montag, 22. April 2024 17:23 An: R Special Interest Group for Meta-Analysis <r-sig-meta-analysis at r-project.org> Cc: Dr. Gerta R?cker <gerta.ruecker at uniklinik-freiburg.de> Betreff: Re: [R-meta] Fwd: Question on Umbrella review and other types There is a package https://cran.r-project.org/package=metaumbrella on CRAN which performs umbrella reviews. Whether what they mean by umbrella is what you mean is open to question. Michael
On 22/04/2024 15:44, Dr. Gerta R?cker via R-sig-meta-analysis wrote:
Hi (whoever you are), If you want to repeat the old meta-analysis anyway, assuming that all studies adhere to some common well-defined inclusion criteria, then why not conducting a meta-analysis including the union of all studies included in the two older reviews and the new studies? This would simply be an updated review, not necessarily an umbrella review. Best, Gerta UNIVERSIT?TSKLINIKUM FREIBURG Institute for Medical Biometry and Statistics Dr. Gerta R?cker Guest Scientist Stefan-Meier-Stra?e 26 ? 79104 Freiburg gerta.ruecker at uniklinik-freiburg.de https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker -----Urspr?ngliche Nachricht----- Von: Im via R-sig-meta-analysis <r-sig-meta-analysis at r-project.org> Gesendet: Montag, 22. April 2024 15:47 An: r-sig-meta-analysis at r-project.org Cc: Im <aligners79 at gmail.com> Betreff: [R-meta] Fwd: Question on Umbrella review and other types ---------- Forwarded message --------- From: Im <aligners79 at gmail.com> Date: Mon, Apr 22, 2024 at 12:56?PM Subject: Question on Umbrella review and other types To: <r-sig-meta-analysis at r-project.org> Hello! I am planning to do an Umbrella review. The number of systematic/meta analysis are two. Rest of the studies are 3-4 new studies published after or almost at same time of these two reviews. My question is can I conduct the Umbrella review ? If not then is there any other type of review that could be performed ? I want to include the previous systematic/meta reviews. I also plan to repeat already performed meta-analysis. Can I add the meta analysis studies HRs and new studies to make another meta-analysis ? Please guide me which review could be the best in this situation. best regards [[alternative HTML version deleted]]
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Michael