Thirty days mortality

Terminology

Reports Aristotle Score Central database Fundamental diagnosis Outcome assigned to Primary procedure Small procedures

Report parameters

Thirty days mortality Hospital mortality Length of stay Basic Score

Data

Validation Validation rules Entry ratio Flow Verification Source data verification Selective entry Backup

Thirty Days Mortality is the fraction of patients that died within 30 days from the date of surgery.

For a single patient, thirty days mortality can be true or false. Condition for true is:

Patient died and was operated not earlier than 30 days before death.

Example of patient history with true:

• 2000-01-01 birth
• 2000-01-15 operation 1
• 2000-02-12 operation 2
• 2000-03-01 death

Even though the first (main) operation was more than 30 days before surgery, there exists a second (probably trivial) operation after which the patient deceased.