Table 1 List of variables collected in conventional severity classification systems (SOFA, SAPS II, APACHE II and APACHE IV)

Age

✔

✔

✔

Glasgow coma score (GCS)

✔

✔

✔

Eyes response

✔

Verbal response

✔

Verbal response

✔

Body temperature (TEMP)

✔

✔

✔

Systolic blood pressure (SBP)

✔

Diastolic blood pressure (DBP)

✔

Mean arterial pressure (MAP)

✔

✔

✔

Heart rate per minute (HR)

✔

✔

✔

Arterial pH (PH)

✔

✔

Level of carbon dioxide in the arterial blood (PCO2)

✔

FIO2

✔

✔

✔

✔

Respiratory rate per minute (RR)

✔

✔

Level of oxygen in the arterial blood (PAO2)

✔

✔

✔

✔

Urinary output

✔

✔

✔

Serum creatinine (Cr)

✔

✔

✔

Serum sodium (Na)

✔

✔

✔

Serum potassium (K)

✔

✔

Blood urea nitrogen (BUN) or urea level

✔

✔

Bicarbonate (HCO3)

✔

Bilirubin level (BIL)

✔

✔

✔

Albumin (ALB)

✔

Blood sugar level (BSL)

✔

White blood count (WBC)

✔

✔

✔

Platelets (PLT)

✔

Mechanical ventilation use

✔

✔

✔

✔

Vasopressors

✔

Hematocrit (Hct) (%)

✔

✔

Chronic diseases/morbidities

✔

✔

✔

Others (Type of admission, 30-day readmission, Pre-ICU LOS, etc.)

✔

✔

✔