From 9d4dfb5e95ffa0d2948395a968b66e2f07a29354 Mon Sep 17 00:00:00 2001 From: clairblacketer Date: Tue, 20 Jun 2017 11:16:01 -0400 Subject: [PATCH] Initial commit --- StandardizedDerivedElements/COHORT.md | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/StandardizedDerivedElements/COHORT.md b/StandardizedDerivedElements/COHORT.md index 64a3b0d..95db2be 100644 --- a/StandardizedDerivedElements/COHORT.md +++ b/StandardizedDerivedElements/COHORT.md @@ -1,9 +1,14 @@ -*OMOP Common Data Model v5.1 Specifications* -
*Authors: Christian Reich, Patrick Ryan, Rimma Belenkaya, Karthik Natarajan, Clair Blacketer* -
***Release date needed*** +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. -[Back to Table of Contents](https://github.com/OHDSI/CommonDataModel/blob/master/Documentation/TableofContents.md) +Field|Required|Type|Description +:----|:----|:-----|:----- +|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.| ---- - -# 8.1 COHORT \ No newline at end of file +### Conventions + * The core of a Cohort is the unifying definition or feature of the Cohort. This is captured in the cohort_definition_id. For example, Cohorts can include patients diagnosed with a specific condition, patients exposed to a particular drug, or Providers who have performed a specific Procedure. + * Cohort records must have a Start Date + * Cohort records must have an End Date, but may be set to Start Date or could have applied a censored date using the Observation Period Start Date. + * Cohort records must contain a Subject Id, which can refer to the Person, Provider, or Visit record. The Cohort Definition will define the type of subject through the subject concept id.