I am trying to figure out how to convert cost data correctly.
Example: There is 1 source record (patient_id, date, drug_code, cost). This drug code maps to 2 (or more) OMOP concept_id.
As a result we have 2 OMOP records in drug_exposure, meaning they have 2 different event_id’s.
The question is how to fill in Cost table?
Solution 1: We can create 1 cost record and use one of these event_id.
In this case we partially lose the relation.
Solution 2: We can create 2 cost records using both event_id’s.
In this case the drug cost gets doubled.
Please share your experience how to solve the problem.