#' Data from a Danish study on triage in an emergency department (ED)
#'
#' Data from a prospective cohort study of triage scoring for an emergency
#' department (ED). The study examined whether the use of patient level
#' measurements would improve an existing triage score. These data were used as
#' a test set (called validation in the manuscript) to examine the performance
#' of the model built using the training (primary) cohort. Some variable names
#' have been changed for readability and for consistency with the primary dataset,
#' but the data on 18 variables for the 6,383 participants are otherwise unchanged.
#' Some variables in the primary dataset do not appear in these data.
#'
#' @name danish.ed.validation
#' @docType data
#' @format A tibble with 6383 rows and 18 variables:
#' \describe{
#' \item{\code{mort30}}{numeric, 1 if patient died within 30 days of admission, 0
#' otherwise}
#' \item{\code{triage}}{factor, triage score given at arrival to ED.
#' Values \code{blue}, \code{green}, \code{yellow}, \code{orange}, \code{red},
#' from lowest to highest priority
#' for treatment. The value \code{blue} normally denotes severity not
#' warranting admission to the ED. Participants coded \code{blue}
#' are in these data but not in the primary data.}
#' \item{\code{age}}{numeric, age in years, rounded to lower integer}
#' \item{\code{sex}}{factor, \code{female}, \code{male}}
#' \item{\code{albumin}}{numeric, serum albumin, in g/L}
#' \item{\code{creatinine}}{numeric, serum creatinine, in umol/L}
#' \item{\code{hemaglobin}}{numeric, serum hemaglobin, in mmol/L }
#' \item{\code{potassium}}{numeric, serum potassium, in mmol/L}
#' \item{\code{leuk.count}}{blood leukocyte count, in 10E9/L}
#' \item{\code{sodium}}{numeric, serum sodium, in mmol/L}
#' \item{\code{c.react.protein}}{numeric, serum C-reactive protein}
#' \item{\code{oxygen.sat}}{numeric, peripheral arterial oxygen saturation, %}
#' \item{\code{resp.rate}}{numeric, respiratory rate per minute}
#' \item{\code{heart.rate}}{numeric, heart rate, beats/min}
#' \item{\code{systolic.bp}}{numeric, systolic blood pressure, in mmHg}
#' \item{\code{readmit.hosp}}{factor, readmitted to hospital within 30 days,
#' with values \code{yes}, \code{no}}
#' \item{\code{days.in.hosp}}{numeric, number of days admitted to hospital}
#' \item{\code{icu.status}}{factor, patient admitted to ICU, with values
#' \code{yes}, \code{no}}
#' }
#' @references Kristensen, Michael, et al. "Routine blood tests are associated
#' with short term mortality and can improve emergency department triage: a cohort
#' study of> 12,000 patients." Scandinavian Journal of Trauma, Resuscitation and
#' Emergency Medicine 25 (2017): 1-8.
#' \url{https://sjtrem.biomedcentral.com/articles/10.1186/s13049-017-0458-x?report=reader}
#' @source \url{doi:10.5061/dryad.m2bq5}
#'
"danish.ed.validation"
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