At 15:28 26.02.2009, Terry Therneau wrote:
> plot(survfit(fit)) should plot the survival-function for x=0 or
> equivalently beta'=0. This curve is independent of any covariates.
This is not correct. It plots the curve for a hypothetical
subject with x=
mean of each covariate.
Does this mean, the curve corresponds to the one you would get based
on the base line hazard?
Heinz
This is NOT the "average survival" of the data set. Imagine a
cohort made up
of 60 year old men and their 10 year old grandsons: the expected survival of
this cohort does not look that for a 35 year old male.
Terry T
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