[R] Estimating Survival function in coxph

[Richards, Tom]

Hello:

Assuming that I have used the coxph function to fit a Cox model with several
covariates, is there a natural way to estimate a value of the survivorship
function at, say, five years, 
S(5), along with a confidence interval?  I have brought this question up
with one or two colleagues, who have suggested using a parametric model, but
I wonder whether it can be done using the semiparametric coxph() model.
Thanks.
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
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
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._