Table 2 Differences between survivors and non-survivors
|  | All (n = 50) | Survivors (n = 37) | Non-survivors (n = 13) | P-values Survivors versus non-survivors |
|---|---|---|---|---|
Age, years | 60 [46–69] | 59 [42–70] | 60 [48–71] | 0.472 |
SAPSII at ICU admission | 42 ± 13 | 38 ± 11 | 52 ± 14 | < 0.001 |
PEEP, cmH2O | 11 [8–15] | 11 [8–15] | 12 [8–13] | 0.664 |
Vt, ml/Kg PBW | 6.9 ± 1.7 | 6.8 ± 1.8 | 7.5 ± 0.9 | 0.184 |
Respiratory rate | 16 [14–22] | 16 [8–21] | 16 [16–22] | 0.128 |
Driving pressure cmH2O | 11 ± 4 | 10 ± 3 | 12 ± 4 | 0.076 |
Plateau pressure, cmH2O | 22 ± 4 | 22 ± 4 | 23 ± 4 | 0.493 |
Respiratory system compliance, ml/cmH2O | 41 [35–51] | 41 [35–52] | 44 [33–52] | 1.0 |
PaO2/FiO2, mmHg | 168 [122–236] | 169 [125–227] | 166 [110–266] | 0.707 |
Ventilatory ratio | 1.4 [0.9–1.9] | 1.5 [1.2–2] | 1.4 [1.2–1.9] | 0.596 |
Ventral ventilation, % | 32 [27–38] | 32 [26–38] | 35 [24–42] | 0.445 |
Ventral perfusion, % | 28 [22–37] | 27 [21–36] | 29 [24–40] | 0.528 |
Middle ventilation, % | 51 [44–56] | 50 [44–57] | 51 [48–55] | 0.956 |
Middle perfusion, % | 55 [49–57] | 55 [50–58] | 50 [46–58] | 0.665 |
Dorsal ventilation, % | 18 [13–21] | 19 [14–21] | 13 [9–22] | 0.126 |
Dorsal perfusion, % | 36 [32–44] | 35 [32–44] | 40 [31–46] | 0.618 |
Unmatched units, % | 25 [18–31] | 21 [17–27] | 32 [27–47] | < 0.001 |
Only-perfused units, % | 10 [5–16] | 8 [5–11] | 19 [11–35] | 0.002 |
Only ventilated units, % | 12 [9–18] | 12 [9–18] | 14 [7–22] | 0.485 |
Only ventilated/only perfused units ratio | 1.6 [0.7–2.4] | 1.7 [0.8–2.6] | 0.6 [0.3–2.2] | 0.040 |