I’m somewhat new to the OHDSI community and am working on performing an ETL using fake data I generated from Synthea. There is an SSN field in the patient table and I found out that concept ID would be 4162224 under the Observation domain. However, a start date is required. What would you put for that? The birthdate? You could have other patient attributes like marital status or religion which do not necessarily have start dates that you can identify. What do you do in these cases?
Thanks for your help.