Re: [R] estimating survival function from Cox model

2013-12-18 Thread Terry Therneau
The standard error of the curve cannot be extracted from the summary information you have. The variance is made up of two terms, one of which is a sum over all the death times, of a quadratic term per death time. That term involves the variance matrix of the Cox model coefficients, the target

[R] estimating survival function from Cox model

2013-12-17 Thread array chip
Hi, I have some questions on how to estimate the survival function from a Cox model. I know how to do this in R using survfit(). But let's say the model was done is another software, and I was only given the estimate of baseline cumulative hazard A0(t=10) at the specified time t=10 (baseline

[R] estimating survival function from Cox model

2013-12-17 Thread array chip
Hi, I have some questions on how to estimate the survival function from a Cox model. I know how to do this in R using survfit(). But let's say the model was done is another software, and I was only given the estimate of baseline cumulative hazard A0(t=10) at the specified time t=10 (baseline

[R] estimating survival function from Cox model

2013-12-17 Thread array chip
Hi, I have some questions on how to estimate the survival function from a Cox model. I know how to do this in R using survfit(). But let's say the model was done is another software, and I was only given the estimate of baseline cumulative hazard A0(t=10) at the specified time t=10 (baseline