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documentation:cdm:cohort_attribute [2015/01/05 16:45] cgreich |
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The COHORT_ATTRIBUTE table contains attributes associated with each subject within a cohort, as defined by a given set of criteria for a duration of time. The definition of the Cohort Attribute is contained in the ATTRIBUTE_DEFINITION table. | The COHORT_ATTRIBUTE table contains attributes associated with each subject within a cohort, as defined by a given set of criteria for a duration of time. The definition of the Cohort Attribute is contained in the ATTRIBUTE_DEFINITION table. | ||
^Field^Required^Type^Description^ | ^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.| | + | |cohort_definition_id|Yes|integer|A foreign key to a record in the [[documentation:cdm:cohort_definition|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.| | |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_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.| | |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.| | ||
- | |attribute_definition_id|Yes|integer|A foreign key to a record in the ATTRIBUTE_DEFINITION table containing relevant Attribute Definition information.| | + | |attribute_definition_id|Yes|integer|A foreign key to a record in the [[documentation:cdm:ATTRIBUTE_DEFINITION|ATTRIBUTE_DEFINITION]] table containing relevant Attribute Definition information.| |
- | |value_as_number|No|float|The attribute result stored as a number. This is applicable to attributes where the result is expressed as a numeric value, such as calculated entities (for example age, BMI) or composite scales (for example Charlson index).| | + | |value_as_number|No|float|The attribute result stored as a number. This is applicable to attributes where the result is expressed as a numeric value.| |
|value_as_concept_id|No|integer|The attribute result stored as a Concept ID. This is applicable to attributes where the result is expressed as a categorical value.| | |value_as_concept_id|No|integer|The attribute result stored as a Concept ID. This is applicable to attributes where the result is expressed as a categorical value.| | ||
==== Conventions ==== | ==== Conventions ==== | ||
* Each record in the COHORT_ATTRIBUTE table is linked to a specific record in the COHORT table, identified by matching cohort_definition_id, subject_id, cohort_start_date and cohort_end_date fields. | * Each record in the COHORT_ATTRIBUTE table is linked to a specific record in the COHORT table, identified by matching cohort_definition_id, subject_id, cohort_start_date and cohort_end_date fields. | ||
- | * It addes to the records additional information, such as co-variates, scores of disease assessment indices, etc. | + | * It adds to the Cohort records calculated co-variates (for example age, BMI) or composite scales (for example Charleson index). |
* The unifying definition or feature of the Cohort Attribute is captured in the attribute_definition_id referring to a record in the ATTRIBUTE_DEFINITION table. | * The unifying definition or feature of the Cohort Attribute is captured in the attribute_definition_id referring to a record in the ATTRIBUTE_DEFINITION table. | ||
* The actual result or value of the Cohort Attribute (co-variate, index value) is captured in the value_as_number (if the value is numberic) or the value_as_concept_id (if the value is a concept) fields. | * The actual result or value of the Cohort Attribute (co-variate, index value) is captured in the value_as_number (if the value is numberic) or the value_as_concept_id (if the value is a concept) fields. |