Minor criteria Respiratory rate ≥ 30 breaths/min PaO2/FiO2 ratio ≤ 250 Multilobar infiltrates Confusion/disorientation Uremia (BUN level, ≥ 20 mg/dl) Leukopenia (WBC count, <4000 /mm3) Thrombocytopenia (platelet count, <100.000 /mm3) Hypothermia (core temperature <36°C) Hypotension requiring excessive fluid resuscitation Major criteria Invasive mechanic ventilation Septic shock with the need for vasopressors *The patients who had at least 1 minor or 3 minor criterion were accepted to intensive care unit (ICU).

Table 1: Criteria for ICU need*.