[R-meta] overall efect size from subgroup analysis
Dear Diego I think the section entitled Separate meta-analyses covers what you want to do. Michael
On 28/04/2021 08:10, Diego Grados Bedoya wrote:
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 at dewey.myzen.co.uk
<mailto:lists at dewey.myzen.co.uk>> wrote:
Dear Diego
I think you may find
https://metafor-project.org/doku.php/tips:comp_two_independent_estimates
<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]]
>
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>
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Michael
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