Patient selection: surgical patient
Parameters:
(1) Surgical Apgar Score (based on blood loss, mean arterial blood pressure and minimum heart rate, from 0 to 10)
(2) ASA status, from 1 to 5 (or 6 for a brain-dead patient)
SASA =
= (surgical Apgar score) + (2 * (6 - (ASA))) =
= (surgical Apgar score) - (2 * (ASA)) + 12
Interpretation:
• minimum SASA: 2 with ASA 5
• maximum SASA: 20
• The higher the score the better the survival.
The unadjusted odds ratio for mortality increased by 9.56 for each 4-point decrease in SASA, which correlates to:
cumulative unadjusted odds ratio =
= 9.56 ^ ((20 - (SASA))/4)
Performance:
• The area under the ROC curve is 0.87.
