Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

st: How to calculate SIR over a datasert with multiple episodes


From   "roland andersson" <rolandersson@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: How to calculate SIR over a datasert with multiple episodes
Date   Fri, 16 Nov 2007 11:50:47 +0100

I am calculating the risk of adenocarcinoma and carcinoid in a cohort
of Crohns patients. The dataset is split on age and yearperiod in 5
year intervals. I use
calender years as the analysetime unit (origin is year of birth, enter
at year of Crohns diagnosis, exit at year of death or cancer or
censor). I now want to calculate the risk as a function of duration of
Crohn's disease. I get problems because the followuptime is slit over
many records over age and year and I do not find an id() option in
strate. How can I do this calculation on this split dataset?

Regards
Roland Andersson
*
*   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 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index