visit_detail_start_date fallback

[SofiaMp]

In the hospital dataset for the visit_detail_start_date we use the epistart field and for the visit_occurrence_start_date the admidate. For both the fallback date if no value given is 1970/01/01. Would it make sense with the data for the "visit_detail" table if the epistart is empty to check and use admidate before the fallback date.

[MaximMoinat]

HES tables, hospital, missing dates (admission date (first admission) and epi_date (episode dates))

• Use the date of the first episode for the missing admission date
• If the date of the epi_date is missing then use the date of admission