Table 1 Patients’ main characteristics at enrollment on clinical settings

Age (years)

68 [63–75]

BMI (Kg/m²)

27 [26–28]

SAPS II at ICU admission

56 [53–71]

Days of intubation before study

3 [2–5]

PaO₂/FiO₂

208 [185–237]

PaCO₂ (mmHg)

37 [37–40]

pH

7.42 [7.37–7.45]

FiO₂ (%)

45 [41–49]

PEEP (cmH₂O)

12 [10–14]

Driving pressure (cmH₂O)^a

8.5 [7.7–9.0]

Respiratory system compliance (ml/cmH₂O) ^a

46 [42–59]

Outcome: survivors

6/8