[R-meta] overall efect size from subgroup analysis

[Diego Grados Bedoya]

Dear Michael,

Sorry, I did not notice that the email was mangled.

Thank for the link but I do not have access to the original data of the
subgroups. I just have the effect sizes, CIs and number of comparisons
(observations).

subgroup CI_lower_limit effect_size CI_upper_limit number_comparisons
group_1 -73 -48 -12 5
group_2 -38 -30 -21 43
group_3 -24 -15 -6 73

Greetings,

Diego

On Tue, 27 Apr 2021 at 16:08, Michael Dewey <lists using dewey.myzen.co.uk> wrote:

> Dear Diego
>
> I think you may find
> https://metafor-project.org/doku.php/tips:comp_two_independent_estimates
> helpful.
>
> Your data is close to unreadable as you posted in HTML and that becomes
> mangled. If you need to re-post you have to find a way to send plain
> text. I do not use Gmail but I am sure it is possible.
>
> Michael
>
> On 27/04/2021 08:56, Diego Grados Bedoya wrote:
> > Dear all,
> >
> > Several meta-analyses in my field do not report the overall effect size
> of
> > the intervention. For instance, they report  the subgroup analysis
> (values
> > as a percentage change for log response ratio):
> >
> > subgroup
> >
> > CI_lower_limit
> >
> > effect_size
> >
> > CI_upper_limit
> >
> > number_comparisons
> >
> > group_1
> >
> > -73
> >
> > -48
> >
> > -12
> >
> > 5
> >
> > group_2
> >
> > -38
> >
> > -30
> >
> > -21
> >
> > 43
> >
> > group_3
> >
> > -24
> >
> > -15
> >
> > -6
> >
> > 73
> >
> > Assuming a random effect model (and considering that the CI of the
> > subgroups could have been estimated by bootstrapping), I wonder if it is
> > possible to estimate the overall effect size and the CIs just with this
> > information?
> >
> > Thank you in advance,
> >
> > Kind regards,
> >
> > Diego
> >
> >       [[alternative HTML version deleted]]
> >
> > _______________________________________________
> > R-sig-meta-analysis mailing list
> > R-sig-meta-analysis using r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-meta-analysis
> >
>
> --
> Michael
> http://www.dewey.myzen.co.uk/home.html
>

	[[alternative HTML version deleted]]