Question: Relation between anchor age and CDM year of birth

[Deleted user]

Thanks for making all this code public! I was looking through the ETL flow and there is one thing I do not quite understand: In the PhysioNet documentation of the MIMIC IV data v2.2, it states that "the anchor_age provides the patient age in the given anchor_year". Hence, it would seem the patient's year of birth (in shifted MIMIC time) should be anchor_year - anchor_age. However, looking at this line of the conversion code (from etl/etl
/cdm_person.sql), it seems the CDM year of birth is set directly to the anchor year (the anchor age is only used in etl/lk_procedure.sql in a different context, as far as I can tell). Did I misunderstand smt. or miss a part of the puzzle?