clinfun (version 1.0.14)

coxphCPE: Gonen \& Heller Concordance Probability Estimate

Description

Calculates the Concordance Probability Estimate for a Cox model.

Usage

coxphCPE(phfit)

Arguments

phfit

output from a proportional hazards fit.

Value

coxphCPE returns a vector with CPE, smooth.CPE & se.CPE which are the estimate, the smoothed estimate and its standard error respectively.

References

Gonen M and Heller G. (2005) Concordance probability and discriminatory power in proportional hazards regression. Biometrika 92, 965-970.

Examples

# NOT RUN {
 library(survival)
  data(pbc)
  pbcfit <- coxph(Surv(time, status==2) ~ trt + log(copper), pbc,
    subset=(trt>0 & copper>0))
  coxphCPE(pbcfit)
# }