[R] 95% CI of Kaplan-Meier survival in package survival

[Terry Therneau]

> My result using Kaplan-Meier estimate in survival package was
> inconsistent with that from Minitab. The survival probabilities are
> same, but their 95% are different.

 Confidence intervals for a survival curve may be calcualted on the
linear (poor performance), log (good), log-log (good), or logit (good)
scales.  I expect that Minitab and S default to different choices.  See
the conf.type argument in help(survfit.formula).

Terry Therneau