EHDEN / Trajectories

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Change column person.birth_datetime to person.year_of_birth for age calculations #12

Closed Kadri0 closed 4 years ago

Kadri0 commented 4 years ago

The original version used the year part of person.birth_datetime, but since birth_datetime is not a required field in several CDM versions, person.year_of_birth column should be used instead which is a required field.