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DEX22: How many poeple take a drug in a given class?



Input:
 Parameter  Example  Mandatory  Notes
ancestor_concept_id 4324992  Yes Antithrombins

Sample query run:
The following is a sample run of the query. The input parameters are highlighted in blue.

SELECT count(distinct d.person_id) as person_count 
        FROM vocabulary.concept_ancestor ca,
             drug_exposure d
        WHERE ca.ancestor_concept_id = 4324992
          AND d.drug_concept_id = ca.descendant_concept_id
        group by ca.ancestor_concept_id
;
Output:
Output field list:
 Field  Description
person_count
A foreign key that refers to a standard concept identifier in the vocabulary for the drug concept.

Sample output record:
 Field  Description
drug_concept_id  
descendant_concept_id  
ancestor_concept_id  
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