rats {survival} | R Documentation

## 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)

### 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

[Package survival version 2.26 Index]