Gives the simulated covariate profile of patients for clincal trials.
data(pats)
a data frame. Each row contains an individual's covariate profile and each column corresponds to a covariate. It contains the following columns:
Options are male and female.
Options are "unemployment" (unemp), "part time" (part.), and "full time" (full.).
Options are >= 1w, <= 0.5w, and 0.5~1w.
Options are unmarried, married, and divorced