since I’m planning to use the Oncology Extension I’ve followed the OHDSI 2020 - Oncology Tutorial.
I have a couple of questions about Base Diagnosis (CONDITION_OCCURRENCE) and Overarching Disease Episode (EPISODE):
- since both tables can be referenced by Diagnostic Modifiers (MEASUREMENT table), for example Tumor Dimension, should I double the “Tumor Dimension” measurement in order to link the fact to both tables? (it is not possible to link one modifier to two different facts)
- more in general, if on the one hand it is clearly stated that Overarching Disease Episode is one and only one, I’m not sure on how many cancer Base Diagnosis could be associated to a patient.