R/data-stent30.R

In OpenIntroStat/openintro-r-package: Data Sets and Supplemental Functions from 'OpenIntro' Textbooks and Labs

#' Stents for the treatment of stroke
#'
#' An experiment that studies effectiveness of stents in treating patients at
#' risk of stroke with some unexpected results. `stent30` represents
#' the results 30 days after stroke and `stent365` represents the results
#' 365 days after stroke.
#'
#'
#' @name stent30
#' @aliases stent365
#' @docType data
#' @format A data frame with 451 observations on the following 2 variables.
#' \describe{
#'   \item{group}{a factor with levels \code{control} and \code{treatment}}
#'   \item{outcome}{a factor with levels \code{no event} and \code{stroke}}
#'   }
#' @source Chimowitz MI, Lynn MJ, Derdeyn CP, et al. 2011. Stenting versus
#' Aggressive Med- ical Therapy for Intracranial Arterial Stenosis. New England
#' Journal of Medicine 365:993- 1003.
#' \doi{10.1056/NEJMoa1105335}.
#' NY Times article reporting on the study: \url{https://www.nytimes.com/2011/09/08/health/research/08stent.html}.
#' @keywords datasets
#' @examples
#'
#' # 30-day results
#' table(stent30)
#'
#' # 365-day results
#' table(stent365)
"stent30"