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Updated COHORT_DEFINITION (markdown)

clairblacketer 2017-06-20 13:45:04 -04:00
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StandardizedVocabularies/COHORT_DEFINITION.md

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The COHORT_DEFINITION table contains records defining a Cohort derived from the data through the associated description and syntax and upon instantiation (execution of the algorithm) placed into the COHORT table. Cohorts are a set of subjects that satisfy a given combination of inclusion criteria for a duration of time. The COHORT_DEFINITION table provides a standardized structure for maintaining the rules governing the inclusion of a subject into a cohort, and can store operational programming code to instantiate the cohort within the OMOP Common Data Model.
Field|Required|Type|Description
:----|:----|:----|:----
:------------------------------|:--------|:-----|:-----------------------------------------------
|cohort_definition_id|Yes|integer|A unique identifier for each Cohort.|
|cohort_definition_name|Yes|varchar(255)|A short description of the Cohort.|
|cohort_definition_description|No|CLOB|A complete description of the Cohort definition|