Is it possible to obtain bootstrap 95% pointwise confidence interval for survival function in SAS?

[ejulianne]

Hello, 

I am wondering if it will be possible for me to obtain a bootstrap 95% pointwise confidence interval on my survival function in SAS? I am working with proc iclifetest with code:

proc iclifetest data=A bootstrap(nboot=500 seed=123) plots=(survival);
time (survival, died);
run;

I know you can obtain a bootstrap confidence interval using proc tspline but I cannot figure out how to do this for a survival function. 

Thank you for any help! 

[djrisks]

Hello,

An option might be to use proc surveyselect to generate your resampled dataset, and then afterwards use proc lifetest on that dataset to obtain your 95% pointwise confidence intervals.

Many thanks,