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st: RE: RE: Cox-Model - Predicted time of failure


From   "Galdo, Virgilio" <[email protected]>
To   <[email protected]>
Subject   st: RE: RE: Cox-Model - Predicted time of failure
Date   Fri, 9 Jul 2004 12:12:23 -0400

Thanks Roy. 
You are right. I just was wondering if someone has a code to do what you mention. Maybe it is easier to explain the results I obtained to non-academic readers in terms of expected failure time instead of hazard rates. 

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Haas, Roy W
Sent: Friday, July 09, 2004 11:49 AM
To: [email protected]
Subject: st: RE: Cox-Model - Predicted time of failure


What do you mean by "time of failure". The Cox Model, because of its non-parametric character, does not lend itself to prediction of explicit functions of "time". If you are looking for the expected failure time, you could use the fact that it is equal to the integral of the survivor function over the positive real line. Of course, your data doesn't extend that far.

You may also want to examine streg. You must specify a parent distribution, from which various functionals can be estimated by matching moments, for example.

Roy W. Haas, Ph.D.
Department of Medicine
UT Health Science Center at San Antonio
7703 Floyd Curl Drive
San Antonio, TX 78229-3900
(210) 567-9272


-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Galdo,
Virgilio
Sent: Friday, July 09, 2004 10:27 AM
To: [email protected]
Subject: st: Cox-Model - Predicted time of failure


Dear all,

How can I get the predicted time of failure using the Cox Model.
I would really appreciate any help.


Virgilio

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