R/data.R

In poset: Analysis of Partially Ordered Data

#' A dataset from a non-alcoholic fatty liver disease study
#'
#' @description A total of 186 patients with non-alcoholic fatty liver disease were recruited
#' at the University of Wisconsin Hospitals in 2017. The patients underwent
#' computed tomography scan of the liver for the presence of non-alcoholic
#' steato-hepatitis, the most severe form of non-alcoholic fatty liver disease.
#' The image was subsequently assessed by two radiologists using a scale of 1
#' to 5, with higher values indicating greater likelihood of disease. This is
#'  a slightly altered dataset from the one used in Mao (2024).
#'
#'
#' @format A data frame with 186 rows (one per patient) and 7 variables:
#' \describe{
#'   \item{R1NASH, R2NASH}{Rating scores (1-5) by two readers.}
#'   \item{Sex}{\code{M}: male; \code{F}: female.}
#'   \item{AF}{Advanced fibrosis (\code{TRUE} or \code{FALSE}).}
#'   \item{Steatosis}{Percent of steatosis.}
#'   \item{SSF2}{Liver mean gray level intensity.}
#'   \item{LSN}{Liver surface nodularity.}
#'   }
#' @references
#' Mao, L. (2024). Win ratio for partially ordered data.
#' \emph{Statistica Sinica}, Under revision.
"liver"