survival in SAS vs R

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1 total messages Started by vsingleton Sat, 14 Apr 2007 19:10

#246

Author: vsingleton
Date: Sat, 14 Apr 2007 19:10

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Here is some code we were using in SAS:

proc phreg data=a;
  model (start,stop)*event(0)=age/ ties=efron ;
  age=start-stop;

We were guessing we might be able to use "coxph"
from the survival package in R to do the same test,
but we are not sure how to set age as a time
varying covariate.

In other words, age will increase as the model runs.
We want to determine if an increase in age leads
to a risk of failure.

If anyone can help us find the equivalent to this
in R, we would be greatly appreciative.

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