documentation:cdm:cohort_definition
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documentation:cdm:cohort_definition [2014/11/17 18:40] cgreich created |
documentation:cdm:cohort_definition [2017/09/25 14:59] (current) clairblacketer |
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| ===== COHORT_DEFINITION table ===== | ===== COHORT_DEFINITION table ===== | ||
| + | **THIS IS OUTDATED. All documentation is now on the [[https://github.com/OHDSI/CommonDataModel/wiki|github wiki]]. Please refer there or to the [[projects:workgroups:cdm-wg|CDM working group]] for more information** | ||
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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. | 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^ | ^Field^Required^Type^Description^ | ||
| - | ^cohort_definition_id^Yes^integer^A unique identifier for each Cohort.^ | + | |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_name|Yes|varchar(255)|A short description of the Cohort.| |
| - | ^cohort_definition_description^No^CLOB^A complete description of the Cohort definition^ | + | |cohort_definition_description|No|CLOB|A complete description of the Cohort definition| |
| - | ^definition_type_concept_id^Yes^integer^Type to define what kind of Cohort definition the record represents and how the syntax may be executed^ | + | |definition_type_concept_id|Yes|integer|Type defining what kind of Cohort Definition the record represents and how the syntax may be executed| |
| - | ^cohort_definition_syntax^No^CLOB^Syntax to operationalize the Cohort definition^ | + | |cohort_definition_syntax|No|CLOB|Syntax or code to operationalize the Cohort definition| |
| - | ^subject_concept_id^Yes^integer^A foreign key to the Concept to which defines the domain of subjects that are members of the cohort (e.g., person, provider, visit).^ | + | |subject_concept_id|Yes|integer|A foreign key to the Concept to which defines the domain of subjects that are members of the cohort (e.g., Person, Provider, Visit).| |
| - | ^cohort_instantiation_date^No^Date^A date to indicate when the Cohort was instantiated in the COHORT table^ | + | |cohort_instantiation_date|No|Date|A date to indicate when the Cohort was instantiated in the COHORT table| |
| ==== Conventions ==== | ==== Conventions ==== | ||
| - | * The cohort_definition_syntax does not define the used syntax. It can be SQL, a cohort definition language, or a free-text description of the algorithm. | + | * The cohort_definition_syntax does not prescribe any specific syntax or programming language. Typically, it would be any flavor SQL, a cohort definition language, or a free-text description of the algorithm. |
| - | * The subject_cocnept_id determines what the individual subjects or entities of the cohort consists of. In most cases, that would be a person (patient). But cohorts could be constructed for providers, visits and any other domain. Note that the domain is not codified using the alphanumerical domain_id like in the CONCEPT table. Instead, the corresponding Concept is used. The Concepts for each domain can be obtained from the DOMAIN table in the domain_concept_id. | + | * The subject_concept_id determines what the individual subjects or entities of the Cohort consists of. In most cases, that would be a Person (patient). But cohorts could also be constructed for Providers, Visits or any other Domain. Note that the Domain is not codified using the alphanumerical domain_id like in the CONCEPT table. Instead, the corresponding Concept is used. The Concepts for each domain can be obtained from the DOMAIN table in the domain_concept_id. |
| - | ~~DISQUS~~ | ||
documentation/cdm/cohort_definition.1416249626.txt.gz · Last modified: 2014/11/17 18:40 by cgreich
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