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Re: st: differences in relative risks


From   Ricardo Ovaldia <ovaldia@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: differences in relative risks
Date   Thu, 11 Mar 2004 16:48:13 -0800 (PST)

Thank you Philip. Unfortunately all I have is the RR
and the corresponding SE. I was thinking that some
method out of the Meta-analysis literature could be
used.

--Ricardo.

--- Philip Ryan <philip.ryan@adelaide.edu.au> wrote:
> One way might be to write out two separate models
> (eg logistic or 
> log-binomial, depending on your research design) and
> then use -suest- to 
> test for equality of the coefficients of the
> suitably parameterised 
> exposures.  For example, as a very general case
> where both the exposures 
> and the outcomes are different (and the sense is
> rather open to question!)
> 
> is the RR for lung cancer among smokers (vs
> non-smokers) different from the 
> RR of heart disease among males (vs females):
> 
> glm lung smoker, link(log) fam(binomial) score(s1)
> est store A
> glm heart sex, link(log) fam(binomial) score(s2)
> est store B
> suest A B
> test [A_lung]smoker = [B_heart]sex
> 
> 
> 
> Phil
> 
> 
> 
> At 09:56 AM 11/03/2004 -0800, you wrote:
> >Dear all,
> >
> >Is there a way in Stata to compare if two relative
> >risks are equal, or alternatively if the ratio of
> two
> >relative risks (RRR) is equal to one?
> >
> >Thank you in advance,
> >Ricardo.
> >
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> 
> Philip Ryan
> Associate Professor,
> Department of Public Health
> Associate Dean (Information Technology)
> Faculty of Health Sciences
> University of Adelaide 5005
> South Australia
> tel 61 8 8303 3570
> fax 61 8 8223 4075
> http://www.public-health.adelaide.edu.au/
> CRICOS Provider Number 00123M
>
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=====
Ricardo Ovaldia, MS
Statistician 
Oklahoma City, OK

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