Table 1.

Patients’ Demographics

Age, years	66 (62–75)
Sex, female, no. (%)	2 (13)
Height, cm	175 (170–178)
Body mass index, kg/m2	28 (24–30)
SAPS II	31 (29–37)
SOFA at study inclusion	2 (2–2)
COVID-19 as the cause of respiratory failure	10 (67)
Hematological malignancies, no.(%)	3 (20)
Duration of Non-Invasive respiratory support before enrollment, hours
Non-Invasive Ventilation	0 (0–0)
Continuous Positive Airway Pressure	0 (0–0)
High Flow Nasal Oxygen	0 (0–12)
Bilateral infiltrates at study inclusion	14 (93)
PaO2/FiO2 during face mask O2	120 (103–137)
PaCO2 during face mask O2	34 (27–36)
Glasgow Coma Scale score on inclusion	15 (15–15)
Treatment failure after the enrollment – need for endotracheal intubation, no. (%)	4 (27)
Length of ICU stay, days	13 (5–19)
In-ICU mortality no. (%)	6 (40)

Data are reported as medians (Interquartile range), unless specified otherwise.