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confidenc
2013 Mar 14
1
cnfidence intervals for survfit()
Hi, I am wondering how the confidence interval for Kaplan-Meier estimator is calculated by survfit(). For example,
> summary(survfit(Surv(time,status)~1,data),times=10)
Call: survfit(formula = Surv(rtime10, rstat10) ~ 1, data = mgi)
time n.risk n.event survival std.err lower 95% CI upper 95% CI
10 168 55 0.761 0.0282 0.707 0.818
I am trying to reproduce the