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Re: st: Follow up: cox models in SAS and STATA


From   rgutierrez@stata.com (Roberto G. Gutierrez, StataCorp.)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Follow up: cox models in SAS and STATA
Date   Thu, 06 Jun 2002 11:24:24 -0500

Thomas Moliterno <TMoliter@gsm.uci.edu> asks:

> This is a follow-up message to my recent post re: coding cox models in SAS
> and Stata (original message copied below).  Thanks to helpful feedback from
> the list regarding differences in how failure events are coded in the two
> programs (my original message below has been edited to reflect this
> feedback), I am now showing the same number of failures in the two programs.
> But I'm still getting different values for the coefficients!  I've confirmed
> that the data has transferred properly from one program to the other, and
> that records with missing variables that are being dropped in Stata are also
> dropped in SAS.  What else could be the problem?!?

[etc.]

A quick comparison of SAS and Stata on fitting a Cox model to the cancer
data revealed no substantive difference.  Hence, we are now working privately
with Thomas to reconcile the differences he is experiencing.  We will report
to the list once this is resolved.

--Bobby
rgutierrez@stata.com
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