survival (version 2.9-6)

rats: Rat data from survival5

Description

48 rats were injected with a carcinogen, and then randomized to either drug or placebo. The number of tumors ranges from 0 to 13; all rats were censored at 6 months after randomization.

Usage

data(rats)

Arguments

format

ll{ 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