In CDM 5.4, the ETL convention of PROCEDURE_OCCURRENCE indicates “If a procedure lasts more than a day, then it should be recorded as a separate record for each day the procedure occurred”. I am wondering what the rational is for this specification, what use cases they apply to, and what the consequences are if such procedure was stored as one record instead of being broken into separate records.
To be precisely, does “lasts more than a day” mean
- procedure’s start time and end time are on different dates, or
- procedure elapse over 24 hours from its start to end?