Thanks Svend,
I wonder if I could ask a more theoretical question: I've calculated the
confidence interval using the Poisson regression method as suggested. The
confidence intervals were consistently smaller than the ones given by
stir. Why?
Tim
"Svend Juul" <[email protected]>
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08/08/2005 12:01
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Re: st: Question on stir
Tim asked:
How can I obtain p-values based on the Incidence Rate Ratio (in stir)
rather than the exact?
-------------------------------------------------------------
I think that -ir- and -stir- is the only analysis in Stata where the
"exact mid-P" value is displayed.
You may use -poisson- to obtain a classical P-value and confidence
interval:
. poisson died smoke , exposure(risktime) irr
Hope this helps
Svend
__________________________________________
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000 Aarhus C, Denmark
Phone: +45 8942 6090
Home: +45 8693 7796
Email: [email protected]
__________________________________________
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