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.
A data frame with 2323 observations on the following 4 variables.
enrolling center, a number from 1 to 37
treatment arm, 0 or 1
This is used in the test suite for the code.
PhD thesis work of Jose Cortinas Abrahantes
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
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