Table 2 Respiratory variables between survivors and non survivors at days 1 and 2
From: Estimated dead space fraction and the ventilatory ratio are associated with mortality in early ARDS
Variable | Day 1 | Day 2 | ||||||
|---|---|---|---|---|---|---|---|---|
Survivors n = 652 (QR) | Non survivors n = 288 (QR) | OR | p-value | Survivors n = 638 (QR) | Non survivors n = 253 (QR) | OR | p-value | |
PEEP (cmH2O) | 10 (5–12) | 10 (6–13) | 1.25 (1.02–1.53) | 0.03 | 8 (5–12) | 10 (6–12) | 1.48 (1.14–1.92) | < 0.01 |
ΔP | 14 (10–19) | 17 (11–22) | 1.73 (1.39–2.14) | 0.04 | 12 (9–17) | 15 (11–21) | 2.26 (1.84–2.80) | 0.03 |
PaO2/FiO2 | 206 (154–261) | 191 (136–255) | 0.85 (0.71–1.02) | 0.08 | 214 (160–266) | 200 (143–245) | 0.76 (0.63–0.92) | < 0.01 |
Crs (ml/cmH2O) | 33 (24–50) | 27 (20–41) | 0.82 (0.72–0.94) | < 0.01 | 40 (28–66) | 30 (20–50) | 0.66 (0.56–0.80) | 0.01 |
VD/VT | ||||||||
Harris–Benedict | 0.6 (0.6–0.7) | 0.7 (0.6–0.7) | 1.23 (1.04–1.46) | 0.01 | 0.6 (0.6–0.7) | 0.7 (0.6–0.7) | 1.25 (1.05–1.50) | 0.01 |
Penn State | 0.6 (0.5–0.6) | 0.6 (0.5–0.7) | 1.28 (1.07–1.55) | < 0.01 | 0.6 (0.6–0.7) | 0.6 (0.5–0.7) | 1.40 (1.16–1.70) | 0.01 |
Direct | 0.6 (0.6–0.7) | 0.7 (0.6–0.8) | 1.40 (1.18–1.63) | 0.02 | 0.6 (0.6–0.7) | 0.7 (0.6–0.8) | 1.56 (1.31–1.85) | 0.03 |
VR | 1.6 (1.4–2) | 1.8 (1.5–2.3) | 1.21 (1.05–1.40) | < 0.01 | 1.7 (1.4–2) | 1.9 (1.5–2.3) | 1.30 (1.12–1.51) | < 0.01 |