SAPS II (Simplified Acute Physiology Score II)

Estimates ICU severity of illness and predicted in-hospital mortality in adults from 17 variables over the first 24 ICU hours; a population-level benchmarking tool, not an individual treatment, triage, or prognostic instrument.

Age (years, 0–120)

Heart rate (worst high or low, /min, 0–300)

Systolic blood pressure (worst, mmHg, 0–300)

Body temperature (highest, deg C, 25–45)

Mechanically ventilated or on CPAP? (gates PaO2/FiO2 scoring)

PaO2/FiO2 ratio (mmHg, 0–1000) — only if ventilated/CPAP

Urine output (L/24h, 0–20)

Serum urea / BUN unit

Serum urea / BUN value (highest, 0–300)

White blood cell count (worst, x1000/mm3, 0–200)

Serum potassium (worst, mEq/L, 0–12)

Serum sodium (worst, mEq/L, 80–200)

Serum bicarbonate (lowest, mEq/L, 0–60)

Serum bilirubin (highest, mg/dL, 0–60)

Glasgow Coma Scale (lowest, 3–15)

Type of admission

Chronic disease (single highest)