curesurv (version 0.1.2)

logCumHaz_ic_wei: logCumHaz_ic_wei function

Description

calculates the confidence intervals of the log of cumulative excess hazard log(-log(Sn(t))) using variances of log(-log(Sn(t))). In this formula, the variance of log of the cumulative excess hazard is obtained using delta method at the scale of log-log of net survival, and with the expression Var(log(log(Sn(t)))) = (dlog(-log(Sn(t)))/dtheta)Var(theta)(dlog(-log(Sn(t)))/dtheta)^T; the Var(theta) is the variance-covariance matrix of theta (estimated parameters).

Usage

logCumHaz_ic_wei(
  object,
  z_pcured = z_pcured,
  z_ucured = z_ucured,
  x,
  level,
  cumLexctopred
)

Arguments

object

ouput from a model implemented in curesurv

z_pcured

covariates matrix acting on cure proportion

z_ucured

covariates matrix acting on survival function of uncured

x

time at which the estimates are predicted

level

(1-alpha/2)-order quantile of a normal distribution

cumLexctopred

a pre prediction obtained with cumLexc_alphaweibull