Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: AW: Meta-analysis pooling relative risk from relative risks possible?


From   "Roger B. Newson" <r.newson@imperial.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: AW: Meta-analysis pooling relative risk from relative risks possible?
Date   Thu, 16 Feb 2012 10:47:37 +0000

Another possibility is -metaparm-, part of the SSC package =parmest-, which you can use together with the -parmhet- package to do meta-analyses with heterogeneity tests and variance-weighted geometric mean effects. These also have an -eform- option for when the input estimates and standard errors are for risk ratios, odds ratios or geometric mean ratios.

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 16/02/2012 10:36, Trelle Sven wrote:
You will need to log-transform the RR and the corresponding confidence interval (e.g. gen newvar = ln(RR)). Then metan from ssc (ssc install metan) should do the job.

If not, you will need to approximate the standard error from the log transformed confidence interval:

se=(uci-lci)/3.92 (should be reasonable in most situations but you have to judge this by yourself)

se = standard error of logRR
uci = upper confidence interval (log transformed)
lci = lower ...

Do not forget to use the eform option.

Best
Sven

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
statalist@hsphsun2.harvard.edu] Im Auftrag von Sofia Ramiro
Gesendet: Donnerstag, 16. Februar 2012 09:14
An: statalist@hsphsun2.harvard.edu
Betreff: st: Meta-analysis pooling relative risk from relative risks possible?


Dear all,

I would like to ask your help for the following: I would like to perform a meta-
analysis of some studies. However, I do not have the raw data to fill in the
2X2 table. I have a Relative Risk (and correspondent 95%CI) for each study. Is
it possible to pool these RR and get a pooled estimate? If yes, how?
I have been searching online for this information, but haven't been
successful...

Thank you!

Sofia

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index