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sauter
2005 Feb 10
1
rats in survival package
...re censored at 6 months after randomization.
Usage:
data(rats)
Format:
rat: id
rx: treatment,(1=drug, 0=control)
observation: within rat
start: entry time
stop: exit time
status: event status
Source:
Gail, Sautner and Brown, Biometrics 36, 255-66, 1980
but "rats" data.frame contains the variables:
names(rats)
[1] "litter" "rx" "time" "status"
It seems to be 150 rats grouped in 50 litters, and 1 mouse is treated at each one. So this dataset does no...