Re: [R] probabilities from survfit.coxph

From: Therneau, Terry M., Ph.D. <therneau_at_mayo.edu>
Date: Thu, 24 Jun 2010 13:29:14 -0500


> In the example below (or for a censored data) using survfit.coxph, can
> anyone point me to a link or a pdf as to how the probabilities
appearing in
> bold under "summary(pred$surv)" are calculated?

These are predicted probabilities that a subject who is age 60 will still be alive. How this is done takes up a chapter in my book -- there is not a simple 1-2 page pdf summary that I know of. Other advanced textbooks on survival cover the topic also.

Terry Therneau



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