version 10.0
log using 8.2.Framingham.log, replace
*  8.2.Framingham.log                
*
*  Estimate the crude (unadjusted) relative risk of 
*  coronary heart disease in men compared to women using 
*  person-year data from the Framingham Heart Study (Levy 1999).
*
iri 823 650 42259 61451
*
*  The equivalent ir command is illustrated below.  
*  
use 8.2.Framingham.dta, clear
list
ir chd male per_yrs
log close