THIS IS OUTDATED. All documentation is now on the github wiki. Please refer there or to the CDM working group for more information
The COHORT table contains records of subjects that satisfy a given set of criteria for a duration of time. The definition of the cohort is contained within the COHORT_DEFINITION table. Cohorts can be constructed of patients (Persons), Providers or Visits.
|cohort_definition_id||Yes||integer||A foreign key to a record in the COHORT_DEFINITION table containing relevant Cohort Definition information.|
|subject_id||Yes||integer||A foreign key to the subject in the cohort. These could be referring to records in the PERSON, PROVIDER, VISIT_OCCURRENCE table.|
|cohort_start_date||Yes||date||The date when the Cohort Definition criteria for the Person, Provider or Visit first match.|
|cohort_end_date||Yes||date||The date when the Cohort Definition criteria for the Person, Provider or Visit no longer match or the Cohort membership was terminated.|