R/twins_data.R

In mult.latent.reg: Regression and Clustering in Multivariate Response Scenarios

#' A set of fetal movements data in twins.
#'
#' This data was collected for research on the effects of maternal mental health on prenatal movements in twins and singletons (Reissland et al., 2021).
#' There are two touch movement types of the fetus recorded: self-touch and twin-to-twin touch,
#' and the mothers’ mental health status was collected on three variables: depression, perceived stress scale and stress.
#' There are 14 pairs of twins, 11 of the mothers were available for one scan and 3 of them were available for two scans,
#' i.e. in total there are 34 observations. This dataset contains only the twins data from the original study.
#'
#' @docType data
#'
#' @usage data(twins_data)
#'
#' @format An object of class \code{"data.frame"}
#' \describe{
#'  \item{id}{The fetus from the same twins share the same id number.}
#'  \item{SelfTouchCodable}{frequency of self-touch for each fetus.}
#'  \item{OtherTouchCodable}{frequency of twin-to-twin for each fetus.}
#'  \item{Depression}{Depression scale of the mothers.}
#'  \item{PSS}{Perceived Stress Scale of the mothers.}
#'  \item{Anxiety}{Hospital Anxiety of the mothers.}
#' }
#' @references Reissland, N., Einbeck, J., Wood, R., and Lane, A. (2021).
#'             Effects of maternal mental health on prenatal movement profiles in twins and singletons.
#'             Acta Paediatrica, 110(9):2553–2558.
#' @keywords datasets
#' @examples
#'
#' data(twins_data)
#' head(twins_data)
"twins_data"