My example is the following:
Disease: Multiple Sclerosis
I have a documented date of onset and date of diagnosis (these two differ). The OMOP CDM tells me that the first date is seen as Observation, the second as CONDITION_OCCURENCE. So far so good.
When I want to insert data into the OBSERVATION table, I’m not sure whether observation_concept_id is the concept_id for “date of onset” (4181873) OR the concept_id for “Multiple Sclerosis” (374919).
How would the correct mapping be? Right now I’m working with CDMv5.2.2.
Thanks a lot!