\name{pbc}
\alias{pbc}
\title{Mayo Clinic Primary Biliary Cirrhosis Data}
\usage{data(pbc)}
\description{Followup of 312 randomised and 108 unrandomised patients
  with primary biliary cirrhosis, a rare autoimmune liver disease, at
  Mayo Clinic. Most variables have some missing data, coded as -9.
}
\format{
    \tabular{ll}{
	age:\tab in years\cr
	alb:\tab serum albumin\cr
	alkphos:\tab alkaline phosphotase\cr
	ascites:\tab presence of ascites\cr
 	bili:\tab serum bilirunbin\cr
	chol:\tab serum cholesterol\cr
	edema:\tab presence of edema\cr
	edtrt:\tab 0 no edema, 0.5 untreated or successfully treated\cr
\tab 1 unsuccessfully treated edema\cr
	hepmeg:\tab enlarged liver\cr
	time: \tab survival time\cr
	platelet:\tab platelet count\cr
	protime:\tab standardised blood clotting time\cr
	sex:\tab 1=male\cr
	sgot:\tab liver enzyme (now called AST)\cr
	spiders:\tab blood vessel malformations in the skin\cr
	stage:\tab histologic stage of disease (needs biopsy)\cr
	status:\tab censoring status\cr
	trt:\tab 1/2/-9 for control, treatment, not randomised\cr
	trig:\tab triglycerides\cr
	copper:\tab urine copper\cr
     }
 }
\source{Fleming TR, Harrington DP. "Counting Processes and Survival Analysis" Wiley:New York}
\keyword{datasets}
