R/dat_udca.R

In debest: Duration Estimation for Biomarker Enrichment Studies and Trials

#' @title A derived biomarker dataset from a trial of usrodeoxycholic acid
#'
#' @description dat_udca is derived from the udca data from the R survival package with biomarker variables defined as the baseline bilirubin level > 1.
#' @source udca data from the R survival package.
#'   \url{https://CRAN.R-project.org/package=survival}
#'
#' @format A data frame with 169 rows and 12 variables:
#' \describe{
#'  \item{id}{subject id}
#'  \item{trt}{treatment assignment}
#'  \item{stage}{disease stage}
#'  \item{bili}{bilirubin level}
#'  \item{riskscore}{disease risk score}
#'  \item{futime}{follow up time in days}
#'  \item{status}{event indicator}
#'  \item{time}{follow up time in months}
#'  \item{entry.dt}{enrollment date}
#'  \item{last.dt}{last visit date}
#'  \item{BMpos}{biomarker positive indicator (bili>1)}
#'  \item{group}{subgroup indicator. 1 : trt=0&BMpos=FALSE; 2 : trt=1&BMpos=FALSE; 3 : trt=0&BMpos=TRUE; 4 : trt=1&BMpos=TRUE.}
#' }
#' @name dat_udca
#' @examples
#' data("dat_udca")
"dat_udca"