I am trying to figure out how to use the Treatment episodes for modeling cancer registry data, specifically the Cancer Radiotherapy, Cancer Surgery and Cancer Drug Treatment episodes. From the documentation online I understand that high level/composite treatments end up in EPISODE and low level/individual treatments in standard OMOP (PROCEDURE_OCCURRENCE, DRUG_EXPOSURE). How does that work for the three episodes:
Most, if not all, surgeries in the cancer registry can be modelled as procedures in PROCEDURE_OCCURRENCE. Does that mean most patients will not have a Cancer surgery episode? Or is it desirable to add a high level surgery for all those patients as a Cancer surgery episode, for example “Excison of neoplasm”? If surgeries should be added to EPISODE only if they are high level/composite then what is an example of such a surgery?
Cancer Drug Treatment:
How is this episode different from a Treatment Regimen episode? episode_object_concept_id comes from the Procedure or Regimen domain so it seems Cancer Drug Treatment will also be a Regimen. Or should Cancer Drug Treatment be seen as an indicator that the patient received chemotherapy and is Treatment Regimen meant to specify what regimen(s)? (And if so, is that the same for Cancer Surgery and Cancer Radiotherapy?)
Is the Cancer Radiotherapy episode meant to model the full (multi-week) radiotherapy treatment while the individual (daily) treatments are in PROCEDURE_OCCURRENCE?
Thanks for your help!