[R] Cumulative dose in survival models

From: <klaus_at_kaae-consult.dk>
Date: Tue, 10 May 2011 10:52:56 +0200

Dear List,

I want to fit a CPH survival model with a time-dependent cumulative exposure variable. More specifically, I have exposure measurements for all cohort members at discrete times (yearly measurements) during follow-up.

I suppose that when estimating the model parameters the most correct would be to have the cumulative exposure for everybody at risk at each death time, as I cannot assume the cumulative exposure to be constant between the yearly measurements . Thus, I need to calculate (interpolate) cumulative exposure for everybody at risk at each death time and pass this to the estimation routine.

Does anyone know how to do this in R? Any help would be much appreciated.

Klaus Andersen

R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Tue 10 May 2011 - 12:48:57 GMT

This quarter's messages: by month, or sorted: [ by date ] [ by thread ] [ by subject ] [ by author ]

All messages

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Tue 10 May 2011 - 14:10:06 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive