rats2

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.

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

rats2 function

<tabular>ll</tabular>{
    rat:	idtrt:	treatment,(1=drug, 0=control) observation:	within ratstart:	entry timestop:	exit timestatus:	event status, 1=tumor, 0=censored}

format

MH Gail, TJ Santner, and CC Brown (1980),
  An analysis of comparative carcinogenesis experiments based on
  multiple times to tumor.
  <em>Biometrics</em> <b>36</b>, 255--266.

rats2: Rat data from Gail et al.

Description

Usage

Arguments

format

source