[R] [newbie] Cox Baseline Hazard

Meles MELES meles at free.fr
Fri Feb 23 00:35:03 CET 2001

I must have a vocabulary problem.
I've tryed the method you gave me and I get a Cumulative Hazard for my 
But, what I'm looking for is the Baseline Hazard (I don't know if the 
term is appropriate).

If I consider a cox model for the intantaneous risk of death:
h(t,Z)=h0(t)exp(b'Z), what I'm looking for is H0(t).

What I get with the surfit() methot is H(t).

I might be completly wrong, but when I compute my data in SPSS, I get a 
Cumulative Baseline Hazard of 0.062, in R, with the surfit way, I get 
0.33, which correspond in the SPSS result to the Cumulative Hazard.

I hope that what i'm writing is not too fuzzy.

I hope my questions are not too boring :-)
Blaise aka Meles
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list