This is a simulated surival data set for investigating random
center effects. To make it realistic, the number of centers and
their sizes is based on an EORTC cancer trial.
Usage
data(eortc)
Format
A data frame with 2323 observations on the following 4 variables.
y
survival time
uncens
0=alive, 1=dead
center
enrolling center, a number from 1 to 37
trt
treatment arm, 0 or 1
Details
This is used in the test suite for the code.
Source
PhD thesis work of Jose Cortinas Abrahantes
References
Cortinas Abrahantes, Jose; Burzykowski, Tomasz (2002), A version of the
EM algorithm for proportional hazards models with random effects ,
Published in: Lecture Notes of the ICB Seminars. p. 15-20