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st: RE: Calculating a pooled odds ratio from an adjusted odds ratio?


From   Marcos Vinicius <bioestatistico@inbox.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: RE: Calculating a pooled odds ratio from an adjusted odds ratio?
Date   Tue, 1 Oct 2013 11:33:03 -0800

Hello,..maybe weighted random-effect meta-analysis: adjusted odds ratios ?
 how to do that using stata?
Vinicius

> -----Original Message-----
> From: bioestatistico@inbox.com
> Sent: Tue, 1 Oct 2013 10:56:08 -0800
> To: statalist@hsphsun2.harvard.edu
> Subject: RE: Calculating a pooled odds ratio from an adjusted odds ratio?
> 
> Hello,
> .. for meta-analysis of unadjusted OR I know the syntax but and for
> adjusted odds ratio ?
> How to conduct using stata?
> Thanks Vinicius.
> 
> use bcgtrial.dta, clear
> list trialnam startyr tcases tnoncases ccases cnoncases , clean noob
> abbr(10)
> 
> 
> 
> 
> metan tcases tnoncases ccases cnoncases, rr fixedi lcols(trialnam
> startyr) xlabel(0.1,10) favours(BCG reduces risk of TB # BCG increases
> risk of TB)
> 
> 
> 
> 
> gen logRR = ln( (tcases /ttotal )/(ccases /ctotal ))
> gen selogRR = sqrt(1/tcases +1/ccases -1/ttotal -1/ctotal )
> metan logRR selogRR , fixed eform nograph
> 
> 
> for meta-analysis of unadjusted
> 
> metan logRR selogRR , fixed eform
> metan logor selogor , eform fixed label(namevare=trialnam,
> yearvar=startyr ) xlabel(.1,.5,1,2,10) force effect("Odds ratio")
> 
>> -----Original Message-----
>> From: bioestatistico@inbox.com
>> Sent: Mon, 30 Sep 2013 10:11:29 -0800
>> To: statalist@hsphsun2.harvard.edu
>> Subject: Calculating a pooled odds ratio from an adjusted odds ratio?
>> 
>> Hello,
>> I have individual adjusted odds ratios from different observational
>> studies, and I want to combine them to calculate a pooled odds ratio,
>> So, is there any formula or guidance on how to combine them  ?  (stata
>> code?)
>> The book(and others classical references) Meta-Analysis in Stata: An
>> Updated Collection from the Stata Journal don’t mention it
>> Any help would be greatly appreciated.
>> Regards,
>> Vinicius,
>> 
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