Simplified Acute Physiology Score (SAPS) II

SAPS II Score is calculated by addition of the selected points below. In-hospital mortality, % = e x / 1+ e x where x = −7.7631 + 0.0737 x (SAPS II Score) + 0.9971 x [ ln(SAPS II Score + 1) ] SAPS II Score: Variable Points Age, years <40 0 40-59 7 60-69 12 70-74 15 75-79 16 ≥80 18 Heart rate Worst value in 24 hours; if patient has had both cardiac arrest (11 points) and extreme tachycardia (7 points), assign 11 points <40 11 40-69 2 70-119 0 120-159 4 ≥160 7 Systolic BP, mm Hg Worst value in 24 hours <70 13 70-99 5 100-199 0 ≥200 2 Temperature ≥39ºC (102.2ºF) Highest temperature in 24 hours No 0 Yes 3 GCS Lowest value in 24 hours; if patient is sedated, use estimated GCS before sedation 14-15 0 11-13 5 9-10 7 6-8 13 <6 26 PaO₂/FiO₂, if on mechanical ventilation or CPAP Lowest value in 24 hours; if patient was extubated <24 hours ago, use lowest value while on mechanical ventilation <100 mm Hg/% (13.3 kPa/%) 11 100-199 mm Hg/% (13.3-26.5 kPa/%) 9 ≥200 mm Hg/% (26.6 kPa/%) 6 Not on mechanical ventilation or CPAP within the last 24 hours 0 BUN, mg/dL (serum urea, mmol/L) Highest value in 24 hours BUN <28 or urea <10 0 BUN 28-83 or urea 10-29.6 6 BUN ≥84 or urea ≥30 10 Urine output, mL/day If patient in ICU <24 hours, calculate for 24 hours (e.g. if 1 L in 8 hours, then mark 3 L in 24 hours) <500 11 500-999 4 ≥1,000 0 Sodium, mEq/L or mmol/L Worst value in 24 hours <125 5 125-144 0 ≥145 1 Potassium, mEq/L Worst value in 24 hours <3.0 3 3.0-4.9 0 ≥5.0 3 Bicarbonate, mEq/L Lowest value in 24 hours <15 6 15-19 3 ≥20 0 Bilirubin Highest value in 24 hours <4.0 mg/dL (<68.4 µmol/L) 0 4.0-5.9 mg/dL (68.4-102.5 µmol/L) 4 ≥6.0 mg/dL (≥102.6 µmol/L) 9 WBC, x 10³/mm³ Worst value in 24 hours <1.0 12 1.0-19.9 0 ≥20.0 3 Chronic disease None 0 Metastatic cancer 9 Hematologic malignancy 10 AIDS 17 Type of admission Scheduled surgical = surgery scheduled ≥24 hours in advance Medical = no surgery within one week of admission Unscheduled surgical = surgery scheduled ≤24 hours in advance Scheduled surgical 0 Medical 6 Unscheduled surgical 8