Table 1 Patient demographic and clinical characteristics
|  | Total (n = 27) | COPD group (n = 14) | Non-COPD group (n = 13) | P-value |
|---|---|---|---|---|
Male sex (%) | 20/74.1% | 13/93% | 7/54% | 0.023 |
Age (years) | 70 ± 14 | 70 ± 8 | 50 ± 13 |  < 0.001 |
Body mass indexa | 21.59 ± 4.56 | 20.4 ± 4.6 | 23.61 ± 4.0 | 0.066 |
PBW (kg) | 60.15 ± 7.61 | 62.3 ± 6.7 | 59.3 ± 8.5 | 0.3193 |
APACHE II | 21.04 ± 6.05 | 20.0 ± 8.0 | 22.2 ± 2.9 | 0.365 |
SOFA | 9.27 ± 3.54 | 8.8 ± 3.6 | 9.8 ± 3.5 | 0.447 |
Murray score | 2.54 ± 0.62 | 2.39 ± 0.59 | 2.69 ± 0.62 | 0.212 |
HR (bpm) | 100 ± 16.69 | 97 ± 15 | 103 ± 18 | 0.377 |
MAP (mmHg) | 86.85 ± 11.71 | 89 ± 14 | 84 ± 9 | 0.229 |
ScvO2 (%) | 73.56 ± 7.953 | 73 ± 8 | 74 ± 8 | 0.578 |
P/F (mmHg) | 175.5 ± 61.3 | 195.7 ± 47.0 | 153.6 ± 69.0 | 0.073 |
PEEPi | 3.16 ± 3.2 | 5.8 ± 2.1 | 0.31 ± 0.43 |  < 0.001 |
EELV (mL) | 937.2 ± 274 | 1135 ± 217.3 | 724.6 ± 130.8 |  < 0.001 |
ARDS | ||||
 Mild | 11 | 7 | 4 |  |
 Moderate | 13 | 6 | 7 |  |
 Severe | 3 | 1 | 2 |  |
Other comorbidities | ||||
 HP | 7 | 4 | 3 |  |
 Type 2 DM | 5 | 3 | 2 |  |
 CKD | 2 | 1 | 1 |  |
 RVD | 12 | 8 | 4 | 0.057 |
28-day all-cause mortality (%) | 11.1 | 14.3 | 7.7 | 0.999 |
90-day all-cause mortality (%) | 22.2 | 21.4 | 23.1 | 0.999 |