CohortMethodData is an S4 class that inherits from CoviarateData, which in turn inherits from Andromeda. It contains information on the cohorts, their
outcomes, and baseline covariates. Information about multiple outcomes can be captured at once for
efficiency reasons.
A CohortMethodData is typically created using getDbCohortMethodData(), can only be saved using
saveCohortMethodData(), and loaded using loadCohortMethodData().
# S4 method for class 'CohortMethodData'
show(object)
# S4 method for class 'CohortMethodData'
summary(object)