documentation:cdm:cohort_attribute
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documentation:cdm:cohort_attribute [2015/01/05 16:39] 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 ==== | ||
| - | * Like with Cohorts, the unifying definition or feature of any Cohort Attribute is captured in the cohort_definition_id. | + | * 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. |
| - | * Cohort Attribute records must have a Start Date | + | * It adds to the Cohort records calculated co-variates (for example age, BMI) or composite scales (for example Charleson index). |
| - | * Cohort Attribute records must have an End Date, but may be set to Start Date or could apply a censored date using the Observation Period Start Date. | + | * 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. |
| - | * Cohort Attribute records must contain a Subject ID, which can refer to a Person, Provider, or Visit record. The cohort definition will define the type of subject through the subject concept id. | + | * 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. |
documentation/cdm/cohort_attribute.txt · Last modified: 2017/09/25 15:09 by clairblacketer
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