EVOLUTION-MANAGER
Edit File: rats.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Rat treatment data from Mantel et al</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for rats {survival}"><tr><td>rats {survival}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2>Rat treatment data from Mantel et al</h2> <h3>Description</h3> <p>Rat treatment data from Mantel et al. Three rats were chosen from each of 100 litters, one of which was treated with a drug, and then all followed for tumor incidence. </p> <h3>Usage</h3> <pre>rats</pre> <h3>Format</h3> <table summary="Rd table"> <tr> <td style="text-align: left;"> litter:</td><td style="text-align: left;"> litter number from 1 to 100</td> </tr> <tr> <td style="text-align: left;"> rx:</td><td style="text-align: left;"> treatment,(1=drug, 0=control) </td> </tr> <tr> <td style="text-align: left;"> time:</td><td style="text-align: left;"> time to tumor or last follow-up</td> </tr> <tr> <td style="text-align: left;"> status:</td><td style="text-align: left;"> event status, 1=tumor and 0=censored</td> </tr> <tr> <td style="text-align: left;"> sex:</td><td style="text-align: left;"> male or female </td> </tr> </table> <h3>Note</h3> <p>Since only 2/150 of the male rats have a tumor, most analyses use only females (odd numbered litters), e.g. Lee et al.</p> <h3>Source</h3> <p>N. Mantel, N. R. Bohidar and J. L. Ciminera. Mantel-Haenszel analyses of litter-matched time to response data, with modifications for recovery of interlitter information. Cancer Research, 37:3863-3868, 1977. </p> <h3>References</h3> <p>E. W. Lee, L. J. Wei, and D. Amato, Cox-type regression analysis for large number of small groups of correlated failure time observations, in "Survival Analysis, State of the Art", Kluwer, 1992. </p> <hr /><div style="text-align: center;">[Package <em>survival</em> version 2.44-1.1 <a href="00Index.html">Index</a>]</div> </body></html>