Table 1.

Baseline characteristics of the study population in supine position, before prone positioning

	n = 40
Age, years	68 [60–72]
Male sex, % (n)	65 (26)
Weight, kg	82 [70–90]
Height, cm	175 [168–176]
Body mass index, kg/m2	27.5 [25.8–30.4]
SAPS II	42 [35–45]
SOFA score	3 [2–7]
Charlson comorbidity score	5 [3–5]
Sedative setting
Propofol, mg/kg/h	3.4 [2.3–4.2]
Midazolam, mg/kg/h	0.07 [0.04–0.08]
Fentanyl, µg/kg/h	2.1 [1.4–2.8]
Rocuronium, mg/kg/h	0.4 [0.3–0.6]
Ventilatory setting
Tidal volume, mL	460 [440–510]
Respiratory rate, bpm	16 [15–17]
PEEP, cmH2O	10 [8–10]
Inspired oxygen fraction	0.70 [0.60–0.90]
Gas exchange
PaO2, mmHg	76 [62–84]
PaCO2, mmHg	48 [42–58]
PaO2/FiO2 ratio	97 [79–145]