rats2

<p>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.</p>

datasets

survival

Contains the core survival analysis routines, including
definition of Surv objects,
Kaplan-Meier and Aalen-Johansen (multi-state) curves, Cox models,
and parametric accelerated failure time models.

Terry Therneau

Survival Analysis

Thomas Lumley

Atkinson Elizabeth

Crowson Cynthia

rats2 function

<p></p><table class="table">
<tr><td>rat:</td><td>id</td></tr>
<tr><td>trt:</td><td>treatment,(1=drug, 0=control)</td></tr>
<tr><td>observation:</td><td>within rat</td></tr>
<tr><td>start:</td><td>entry time</td></tr>
<tr><td>stop:</td><td>exit time</td></tr>
<tr><td>status:</td><td>event status, 1=tumor, 0=censored</td></tr>
</table><p></p><p></p>

Format

Rat data from Gail et al. — rats2

<p></p><table class='table'>
<tr><td>rat:</td><td>id</td></tr>
<tr><td>trt:</td><td>treatment,(1=drug, 0=control)</td></tr>
<tr><td>observation:</td><td>within rat</td></tr>
<tr><td>start:</td><td>entry time</td></tr>
<tr><td>stop:</td><td>exit time</td></tr>
<tr><td>status:</td><td>event status, 1=tumor, 0=censored</td></tr>
</table>



rats2: Rat data from Gail et al.

Description

Usage

Arguments

Format

rat:	id
trt:	treatment,(1=drug, 0=control)
observation:	within rat
start:	entry time
stop:	exit time
status:	event status, 1=tumor, 0=censored