Stata The Stata listserver
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

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



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.

__________________________________
Do you Yahoo!?
Yahoo! Search - Find what you're looking for faster
http://search.yahoo.com
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/
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
-----------------------------------------------------------
This email message is intended only for the addressee(s)
and contains information that may be confidential and/or
copyright. If you are not the intended recipient please
notify the sender by reply email and immediately delete
this email. Use, disclosure or reproduction of this email
by anyone other than the intended recipient(s) is strictly
prohibited. No representation is made that this email or
any attachments are free of viruses. Virus scanning is
recommended and is the responsibility of the recipient.

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index