Table 2.
Respiratory variables for the whole period of 29 days
| Before intervention (n = 23) | After intervention (n = 38) | P value | |||
| Non-ALI/ARDS (n = 13) | ALI/ARDS (n = 10) | Non-ALI/ARDS (n = 23) | ALI/ARDS (n = 15) | ||
| VT (ml/kg PBW) | 10.2 (9.3 to 11.1) | 9.7 (8.9 to 10.5) | 8.6 (7.8 to 9.5) | 7.8 (7.2 to 8.5) | <0.001 |
| Pmax (cmH2O) | 18.2 (13.0 to 23.4) | 21.8 (18.1 to 25.5) | 16.8 (11.4 to 22.2) | 25.6 (22.8 to 28.5) | 0.01 |
| RR (breaths/min) | 21.3 (18.4 to 24.3) | 18.3 (16.1 to 20.6) | 23.4 (20.5 to 26.4) | 25.6 (23.7 to 27.6) | <0.001 |
| PaCO2 (kPa) | 5.0 (4.3 to 5.7) | 5.3 (4.8 to 5.8) | 5.5 (4.9 to 6.2) | 6.2 (5.8 to 6.6) | 0.007 |
P values were determined using linear mixed model analysis, comparing all four groups. Values are expressed as mean (95% confidence interval). ALI, acute lung injury; ARDS, acute respiratory distress syndrome; PaCO2, partial pressure of arterial carbon dioxide; Pmax, maximum airway pressure; RR, respiratory rate; VT, tidal volume.