Variables | Without P/SE | With P/SE | p-value |
Subjects n | 146 | 23 | |
Age years | 67 (59–71) | 64 (60–70) | 0.24 |
Male sex | 118 (80.8) | 15 (65) | 0.09 |
Body mass index kg·m−2 | 28 (26–31) | 27 (25–31) | 0.29 |
Diabetes mellitus | 23 (15.8) | 3 (13) | 0.74 |
Arterial hypertension | 79 (54.1) | 11 (47.8) | 0.58 |
COPD | 4 (2.7) | 0 (0) | 1 |
Positive end-expiratory pressure cmH2O | 12 (10–14) | 12 (8–15) | 0.72 |
Peak airway pressure cmH2O | 29±5 | 30±5 | 0.56 |
Plateau airway pressure cmH2O | 23±4 | 24±6 | 0.80 |
pH | 7.28±0.12 | 7.33±0.11 | 0.07 |
PaCO2 mmHg | 57±16 | 53±15 | 0.26 |
Compliance of the respiratory system mL·cmH2O−1 | 27 (22–33) | 28 (22–36) | 0.55 |
Minute ventilation L·min−1 | 8.9±1.3 | 8.3±1.1 | 0.04 |
Corrected minute ventilation L·min−1 | 12.7 (9.4–15) | 9.9 (8.4–13.1) | 0.07 |
PaO2/FIO2 mmHg | 114 (86–153) | 105 (81–137) | 0.21 |
Tidal volume/ideal body weight mL·kg−1 | 5.9±0.8 | 6.1±0.9 | 0.23 |
Length of stay in intensive care unit | 9 (5–18) | 11 (6–21) | 0.44 |
Length of stay in hospital | 14 (8–23) | 18 (12–28) | 0.18 |
In-hospital mortality | 73 (50) | 13 (56.5) | 0.46 |
Data are presented as median (interquartile range), n (%) or mean±sd, unless otherwise stated. PaCO2: arterial carbon dioxide tension; PaO2: arterial oxygen tension; FIO2: inspiratory oxygen fraction.