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Re: st: Forest plot with p from overall z test


From   Antonio silva <asilva@inbox.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Forest plot with p from overall z test
Date   Sat, 5 Nov 2011 07:19:58 -0800

Dear Dr Roger,
Thank you for the reply and informations.
Sincerely,
Antonio

> -----Original Message-----
> From: r.newson@imperial.ac.uk
> Sent: Thu, 03 Nov 2011 22:01:16 +0000
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: Forest plot with p from overall z test
> 
> An unpublicized feature of -metan- is that it saves a series of results
> in -r()-, whose names give an idea regarding what they are.
> 
> For instance, if you type in Stata
> 
> use http://fmwww.bc.edu/repec/bocode/m/metan_example_data;
> metan tdeath tnodeath cdeath cnodeath, rd random label(namevar=id,
> yearid=year) counts;
> return list;
> 
> then Stata responds with a list of results in r() as follows:
> 
> scalars:
>                 r(cger) =  .4864029666254636
>                 r(tger) =  .5012391573729864
>                 r(tau2) =  .0047751229726653
>               r(p_chi2) =  .
>                 r(chi2) =  .
>                r(p_het) =  .0193742235231943
>                   r(df) =  19
>                  r(het) =  33.80513003131778
>                 r(i_sq) =  43.79551274496503
>                  r(p_z) =  .260512232288569
>                    r(z) =  1.125181260695625
>               r(ci_upp) =  .0743049097225629
>               r(ci_low) =  -.0201055217834572
>                 r(seES) =  .0240847363142174
>                   r(ES) =  .0270996939695528
> 
> macros:
>              r(measure) : "RD"
> 
> These results can be referenced by the user, and presumably added to the
> -metan- plot in a second execution of -metan-. I do not know why these
> useful results are not publicized in the on-line help for -metan-.
> 
> Another possibility might be to use the -metaparm- module of the
> -parmest- package, together with the -parmhet- and -eclplot- packages,
> instead of using -metan-. The -parmest-, -parmhet- and -eclplot-
> packages are all downloadable from SSC. Together, they should be able to
> do what -metan- does. However, they require more programming skill than
> -metan-, so most new users prefer to use -metan-.
> 
> I hope this helps.
> 
> Best wishes
> 
> Roger
> 
> Roger B Newson BSc MSc DPhil
> Lecturer in Medical Statistics
> Respiratory Epidemiology and Public Health Group
> National Heart and Lung Institute
> Imperial College London
> Royal Brompton Campus
> Room 33, Emmanuel Kaye Building
> 1B Manresa Road
> London SW3 6LR
> UNITED KINGDOM
> Tel: +44 (0)20 7352 8121 ext 3381
> Fax: +44 (0)20 7351 8322
> Email: r.newson@imperial.ac.uk
> Web page: http://www.imperial.ac.uk/nhli/r.newson/
> Departmental Web page:
> http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/
> 
> Opinions expressed are those of the author, not of the institution.
> 
> On 03/11/2011 15:26, Frederico Moreira wrote:
>> 
>> 
>> Hello,
>> I am a beginner in Stata programming.
>> I would like to know how(if it is possible) to produce a forest plot
>> with the p-value from overall z test using  the metan routine. I read
>> the help metan and the book Meta-Analysis in Stata:An updated collection
>> from the stata journal but I did not find any indication if it is
>> possible. Normally, this p-value appears in the summary table but not in
>> the graph.
>> Thank you in advance,
>> Any help would be much appreciated.
>> 
>> Antonio Silva.
>> 
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