GastricCancer

There are 90 observations on 4 variables.
Times is the survival times in years.
Status is the censoring status. 
ax is the covariate that satisfy proportional hazards assumptions. 
zo is the covariate that indicating the two treatments, which we suppose follow the YP model.
For more details please see the reference below.

Data are from 
Ying, Z., Jung, SH, and Wei, LJ (1995). 
Median regression analysis with censored data.
Journal of the American Statistical Association,
90, 178-184.

datasets

Empirical likelihood ratio tests for the Yang and Prentice (short/long term hazard ratio) models. 
             Empirical likelihood tests within a Cox model, for parameters defined via 
			 both baseline hazard function and regression parameters.

Mai Zhou

ELYP

Empirical Likelihood Analysis for the Cox Model and
        Yang-Prentice (2005) Model

GastricCancer function

A data frame containing 90 observations on 4 variables:
<tabular>rl</tabular>{
        [,1] 	"times"[,2] 	"status"[,3] 	"ax"[,4] 	"zo"}

GastricCancer: Gastric Cancer Data

Description

Usage

Arguments

format

References