Table 1.

List of predictor variables.

Category	Predictor variables
Demographics	Age, gender
Administrative information	Admission type (elective, urgent, emergency), ICUa service type (MICUb, SICUc, CCUd, CSRUe)
Vital signs (min. and max. every 6 hours during the first 24 hours in the ICU)	Heart rate, mean blood pressure, systolic blood pressure, SpO2, spontaneous respiratory rate, body temperature
Labs (min. and max. from the first 24 hours in the ICU	Hematocrit, white blood cell count, serum glucose, serum HCO3, serum potassium, serum sodium, blood urea nitrogen, and serum creatinine
Intervention (yes/no during the first 24 hours in the ICU)	Vasopressor therapy, mechanical ventilation, or continuous positive airway pressure
Others (from the first 24 hours in the ICU)	Worst Glasgow Coma Scale score, total urinary output every 6 hours

^aICU: intensive care unit.

^bMICU: medical intensive care unit.

^cSICU: surgical intensive care unit.

^dCCU: coronary care unit.

^eCSRU: cardiac surgery recovery unit.