[R-meta] Fwd: Question on Umbrella review and other types
Im
@||gner@79 @end|ng |rom gm@||@com
Wed Apr 24 09:56:22 CEST 2024
Dear Dr Michael!
Thanks a lot for your much valuable suggestions, I will proceed accordingly.
best regards,
Imran
On Tue, Apr 23, 2024 at 2:04 PM Michael Dewey <lists using dewey.myzen.co.uk>
wrote:
> If you are going to update the review I suggest best practice is to redo
> the search as otherwise you are importain any biases introduced by the
> authors of the previous reviews.
>
> Michael
>
> On 22/04/2024 19:45, Im wrote:
> >
> > Dear All!
> > Many thanks indeed for your much valuable replies.
> >
> > My research is based on "Prognosis in relation to age in a carcinoma".
> > The study results are "young age patients have better prognosis", "old
> > age have worst prognosis", "age has not affect on prognostication"
> etc....
> > Is it possible to be selective in the studies in terms of time
> > of studies published etc., so that there can be some change in the
> > analysis than previous ones ?
> >
> > With such a trivial number (only two) of previous SRMA, it seems better
> > to conduct a new SRMA instead. But I am bit concerned whether it is Ok
> > to conduct a new SRMA when the previously SRMA have been published with
> > a gap of just couple of years (2020 and 2021)?
> >
> > So, if there is no problem in conducting a new SRMA, then I would be add
> > the studies and proceed with the routine "meta" package in R studios for
> > forest plots and funnel plots ?
> >
> > best regards,
> > Imran
> >
> > On Mon, Apr 22, 2024 at 6:35 PM Dr. Gerta Rücker via R-sig-meta-analysis
> > <r-sig-meta-analysis using r-project.org
> > <mailto:r-sig-meta-analysis using r-project.org>> wrote:
> >
> > 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
> >
> > UNIVERSITÄTSKLINIKUM FREIBURG
> > Institute for Medical Biometry and Statistics
> >
> > Dr. Gerta Rücker
> > Guest Scientist
> >
> > Stefan-Meier-Straße 26 · 79104 Freiburg
> > gerta.ruecker using uniklinik-freiburg.de
> > <mailto:gerta.ruecker using uniklinik-freiburg.de>
> >
> >
> https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker
> <https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker
> >
> >
> >
> > -----Ursprüngliche Nachricht-----
> > Von: Michael Dewey <lists using dewey.myzen.co.uk
> > <mailto:lists using dewey.myzen.co.uk>>
> > Gesendet: Montag, 22. April 2024 17:23
> > An: R Special Interest Group for Meta-Analysis
> > <r-sig-meta-analysis using r-project.org
> > <mailto:r-sig-meta-analysis using r-project.org>>
> > Cc: Dr. Gerta Rücker <gerta.ruecker using uniklinik-freiburg.de
> > <mailto:gerta.ruecker using 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
> > <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 Rücker 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
> > >
> > >
> > > UNIVERSITÄTSKLINIKUM FREIBURG
> > > Institute for Medical Biometry and Statistics
> > >
> > > Dr. Gerta Rücker
> > > Guest Scientist
> > >
> > > Stefan-Meier-Straße 26 · 79104 Freiburg
> > > gerta.ruecker using uniklinik-freiburg.de
> > <mailto:gerta.ruecker using uniklinik-freiburg.de>
> > >
> > >
> >
> https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker
> <https://www.uniklinik-freiburg.de/imbi-en/employees.html?imbiuser=ruecker
> >
> > >
> > > -----Ursprüngliche Nachricht-----
> > > Von: Im via R-sig-meta-analysis
> > <r-sig-meta-analysis using r-project.org
> > <mailto:r-sig-meta-analysis using r-project.org>>
> > > Gesendet: Montag, 22. April 2024 15:47
> > > An: r-sig-meta-analysis using r-project.org
> > <mailto:r-sig-meta-analysis using r-project.org>
> > > Cc: Im <aligners79 using gmail.com <mailto:aligners79 using gmail.com>>
> > > Betreff: [R-meta] Fwd: Question on Umbrella review and other types
> > >
> > > ---------- Forwarded message ---------
> > > From: Im <aligners79 using gmail.com <mailto:aligners79 using gmail.com>>
> > > Date: Mon, Apr 22, 2024 at 12:56 PM
> > > Subject: Question on Umbrella review and other types
> > > To: <r-sig-meta-analysis using r-project.org
> > <mailto:r-sig-meta-analysis using 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
> > _______________________________________________
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> --
> Michael
>
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