CO02: How to determine the onset of a condition

Determines the onset of a condition in a dataset.

 Parameter  Example  Mandatory  Notes
concept_id 23988 Yes Condition concept ID for 'Hemolytic anemia due to glutathione metabolism disorder'

Sample query run:
The following is a sample run of the query. The input parameters are highlighted in blue
SELECT    min(c.condition_start_date) onset_condition_date
FROM      condition_occurrence c
WHERE     c.condition_concept_id = 23988 
  AND     exists (SELECT 1 FROM observation_period op 
                  WHERE  op.person_id = c.person_id
                    AND  add_months(op.observation_period_start_date, 6) < c.condition_start_date)
Output field list:
 Field  Description
onset_condition_date The date when the instance of the condition is recorded first time.

Sample output record:
 Field  Description
onset_condition_date  9-Jul-2003