[R-meta] Meta analysis subgroups

[Julie Webbs]

Dear Michael

Thank you for your email. and sorry about that.

I have to variables, say X and Y.

1. The X has two categories, let's say  a and b, so you  can calculate Mean
and SD for group *a* and group *b*.

2. The Y has two categories, let's say *c* and *d*. So you can calculate
Man and SD for group a and group d.

I have run a meta-analysis separately for both X and Y using the meta
package.

Now I want to  run a met-analysis for  X differences associated with Y. Is
it possible? or I need to consider other statistical procedures?

Here is the excel file

 Thank you
Julie
[image: image.png]

On Thu, Aug 29, 2019 at 1:28 PM Michael Dewey <lists using dewey.myzen.co.uk>
wrote:

> Dear Julie
>
> Sorry bit that does not make much sense to me. See comments in-line
>
> On 28/08/2019 21:42, Julie Webbs wrote:
> > Dear All
> >
> > I have two continuous variables and each has two categories as follows:
> >
>
> If they are continuous then they do not have categories so I am at a
> loss here.
>
> > X = a and b
> > Y= c and d
> >
> > I have calculated  the standardised mean difference (SMD)  for  *X* and
> *Y
> > using meta-analysis.*
> > I want to calculate *X* differences associated with *Y*.
> >
>
> That also seems opaque here.
>
> > Would you please advise me how I can do it. Here is a sample of data.
> Thank
> > you, Julie
>
> I am afraid your data-set did not arrive here well since you posted in
> HTML and such posts get mangled when they pass through the list. It
> might also help if you posted an example of what the differences you are
> seeking would look like.
>
> >
> > X Y
> > Mean SD Mean SD Mean SD Mean SD
> > a a b b c c d d
> > 12 1 14 2 10 0.3 18 0.1
> > 11 2 13 0.5 11 0.1 14 0.3
> > 10 1 12 1 14 1 16 0.2
> >
> >       [[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
> >
> > ---
> > This email has been checked for viruses by AVG.
> > https://www.avg.com
> >
> >
>
> --
> Michael
> http://www.dewey.myzen.co.uk/home.html
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://stat.ethz.ch/pipermail/r-sig-meta-analysis/attachments/20190829/87796346/attachment.html>

-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 7144 bytes
Desc: not available
URL: <https://stat.ethz.ch/pipermail/r-sig-meta-analysis/attachments/20190829/87796346/attachment.png>