Survival Confidence Intervals

The endpoints of a p × 100% confidence interval are calculated as:

Normal Approximation

CIlow = surv_prob - ( p × surv_prob SE )

CIhigh = surv_prob + ( p × surv_prob SE )

Log( - ( Log ) ) Transformation

CIlow = surv_prob × e p × Abs( surv_prob SE / ( surv_prob × Log( surv_prob ) ) )

CIhigh = surv_prob × e -p × Abs( surv_prob SE / ( surv_prob × Log( surv_prob ) ) )