First operation

From ECHSA Congenital Database
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Database reports

Primary procedure election
Primary operation election
Patients filtering
First operation
Thirty days mortality

Primary reports
Gold standards report
Basic Score report
Complications report
Quality of care report
Outcome prognosis
National report

First operation is the earliest operation. However, there are cases where more than one operations where performed on the same day. Since the database doesn't contain the time of each operation, it's impossible to determine which one was first by looking at the date alone.

In such case, the Basic Score is used to choose one of them. If both of them have equal maximum Basic Score, then it is impossible to determine the first operation at all.