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st: restrict subjects for analysis from multi-record data


From   "KUBO Tatsuhiko" <kubo@med.uoeh-u.ac.jp>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: restrict subjects for analysis from multi-record data
Date   Tue, 7 Oct 2008 10:32:00 +0900

Dear colleges,

I am now making a survival analysis using the multi-record data.

Now, I want to restrict the subjects for analysis regarding their life 
styles.
  >>  e.g. make analysis only among subjects who are smokers (smoke==1) at 
the time of the baseline(_t0==0).
  >>  e.g. make analysis only among subjects who are smokers at the time of 
the endpoint.

In this case what command should be used to restrict the subjects?


Thank you.





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