liver.Rd

% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/liver.R
\docType{data}
\name{liver}
\alias{liver}
\title{Liver cirrhosis drug trial data}
\format{
A \code{data.frame} in the unbalanced format with longitudinal observations 
  from 488 subjects. The columns are:
  
  \describe{
  
  \item{\code{id}}{integer: number for patient identification.}
  
  \item{\code{prothrombin}}{integer: prothrombin index measurement (\%).}
  
  \item{\code{time}}{numeric: time of prothrombin index measurement (years).}
  
  \item{\code{treatment}}{integer: patient treatment indicator. Coded as 
  \code{0 = }placebo; \code{1 = }prednisone.}
  
  \item{\code{survival}}{numeric: patient survival time (years).}
  
  \item{\code{cens}}{integer: censoring indicator. Coded as \code{1 = }died; 
  \code{0 = }censored.}
  
  }
}
\source{
Skrondal A, Rabe-Hesketh S. \emph{Generalized Latent Variable
  Modeling: Multilevel, Longitudinal and Structural Equation Models.} Chapman
  & Hall/CRC. 2004. URL: \url{https://www.gllamm.org/books/readme.html#14.6}.
}
\usage{
data(liver)
}
\description{
This dataset gives the longitudinal observations of prothrombin 
  index, a measure of liver function, for patients from a controlled trial 
  into prednisone treatment of liver cirrhosis. Time-to-event information in 
  the form of the event time and associated censoring indicator are also 
  recorded along with a solitary baseline covariate - the allocated treatment
  arm in this instance. The data are taken from Andersen et al. (1993, p. 19)
  and were analyzed in Henderson et al. (2002). This is a subset of the full 
  data where a number of variables were recorded both at entry and during the
  course of the trial.
}
\references{
Andersen PK, Borgan O, Gill RD, Kieding N. \emph{Statistical Models Based on 
Counting Processes}. New York: Springer. 2003.

Henderson R, Diggle PJ, Dobson A. Identification and efficacy of longitudinal
markers for survival. \emph{Biostatistics} 2002; \strong{3}: 33-50.
}
\seealso{
\code{\link{heart.valve}}, \code{\link{epileptic}}, 
  \code{\link{mental}}, \code{\link{aids}}.
}
\keyword{datasets}