SAPS 3 score = 16 + the points from the components below.

Global logit = −32.6659 + 7.3068 × ln(SAPS 3 score + 20.5958).

Predicted hospital mortality (%) = 100 × e^{global logit} / (1 + e^{global logit}).

Simplified Acute Physiology Score (SAPS) 3