documentation:cdm:cohort_attribute
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documentation:cdm:cohort_attribute [2014/12/05 21:08] cgreich created |
documentation:cdm:cohort_attribute [2015/01/05 16:45] cgreich |
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| |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 ==== | ||
| - | * The core of a Cohort Attribute is the unifying definition or feature of the Cohort. This 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 addes to the records additional information, such as co-variates, scores of disease assessment indices, etc. |
| - | * 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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