Table 1 Patients’ characteristics at inclusion, during intensive care unit stay and main outcomes

Inclusion

 N

103

 Age (years)

60 ± 13 (58–63)

 Male gender (n)

73 (70.9%)

 BMI (kg/m²)

29 ± 7 (28–31)

 SAPS2

54 ± 17 (51–57)

 SOFA

9 ± 4 (9–10)

 ARDS (n)

98 (95%)

 ARDS due to pneumonia (n)

96 (93.2%)

ICU stay

 Prone position sessions (n)

231

 Prone position sessions (n per patient)

2.2 ± 1.8 (1.9–2.6)

 Prone position sessions (hours)

21.5 ± 5 (20.7–22)

 Delay between sessions (hours)

64.2 ± 99.2 (37.3–91.2)

 Invasive mechanical ventilation (days)

17.3 ± 10.9 (15.2–19.4)

  Non-invasive ventilation (n)^a

73 (70.9%)

 Non-invasive ventilation (days)^a

3.2 ± 2.6 (2.6–3.8)

 Vasopressor (n)^a

101 (98.1%)

 Vasopressor duration (days)^a

9 ± 7.3 (7.6–10.5)

 Tracheostomy (n)^a

10 (9.7%)

 Renal replacement therapy (n)^a

29 (34%)

 Corticosteroids (n)^a

68 (66%)

 NMBA (n)^a

97 (94.2%)

 Extracorporeal membrane oxygenation (n)^a

1 (1%)

Complications and outcomes

 Pneumothorax (n)^a

2 (1.9%)

 Ventilation-associated pneumonia (n)^a

44 (49.7%)

 ICU length of stay (days)

22.3 ± 13.8 (19.6–24.9)

 Hospital length of stay (days)

27.2 ± 15.5 (24.2–30.1)

 ICU deaths with ARDS (n)

34 (33%)

 ICU deaths (n)

38 (36.9%)

 Hospital deaths (n)

39 (37.9%)