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Re: st: differences in relative risks

From   Philip Ryan <[email protected]>
To   [email protected]
Subject   Re: st: differences in relative risks
Date   Fri, 12 Mar 2004 09:32:40 +1030

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


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,

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