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Emergency & Critical Care
SAPS II Score

SAPS II Score — Simplified Acute Physiology Score

ICU mortality prediction from worst physiologic values in first 24h

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SAPS II Score
Predicted Hospital Mortality:
logit = −7.7631 + 0.0737 × score + 0.9971 × ln(score + 1)
Predicted mortality = e^logit / (1 + e^logit)
Score range: 0 to ~163 (theoretically); validated range 0–120
SAPS II vs APACHE II: Both validated ICU scores. SAPS II uses 15 variables; APACHE II uses 12 + age + chronic health. SAPS II was validated in European ICUs. Neither should be used as sole basis for individual patient decisions.
For clinical decision support only. Not a substitute for professional medical judgment.

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