The cohort table with only records for individuals satisfying the
age requirement
Arguments
cohort
A cohort table in a cdm reference.
ageRange
A list of minimum and maximum age.
cohortId
IDs of the cohorts to modify. If NULL, all cohorts will be
used; otherwise, only the specified cohorts will be modified, and the
rest will remain unchanged.
indexDate
Variable in cohort that contains the date to compute the
demographics characteristics on which to restrict on.