gehan {MASS}R Documentation

Remission Times of Leukaemia Patients

Description

A data frame from a trial of 42 leukaemia patients. Some were treated with the drug 6-mercaptopurine and the rest are controls. The trial was designed as matched pairs, both withdrawn from the trial when either came out of remission.

Arguments

pair label for pair
time remission time in weeks
cens censoring, 0/1
treat treatment, control or 6-MP

Format

This data frame contains the following columns:

Source

Cox, D. R. and Oakes, D. (1984) Analysis of Survival Data. Chapman & Hall, p. 7. Taken from

Gehan, E.A. (1965) A generalized Wilcoxon test for comparing arbitrarily single-censored samples. Biometrika 52, 203-233.

Examples

library(survival5)
data(gehan)
gehan.surv <- survfit(Surv(time, cens) ~ treat, data=gehan,
     conf.type="log-log")
summary(gehan.surv)
survreg(Surv(time, cens) ~ factor(pair) + treat, gehan, dist="exp")
summary(survreg(Surv(time, cens) ~ treat, gehan, dist="exp"))
summary(survreg(Surv(time, cens) ~ treat, gehan))
gehan.cox <- coxph(Surv(time, cens) ~ treat, gehan)
summary(gehan.cox)


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