Table 1.
Baseline clinical characteristics and demographics of patients
| Variables | EIT group (n = 61) | Control group (n = 56) | p values |
|---|---|---|---|
| Age (years) | 61.0 (44.0, 68.0) | 66.5 (50.0, 73.0) | 0.074 |
| Female Sex | 19/61 | 21/56 | 0.597 |
| Body mass index (kg/m2) | 26.0 (22.9, 29.1) | 26.0 (22.9, 28.6) | 0.933 |
| APACHE II score | 19.0 (15.0, 25.0) | 18.0 (15.0, 21.2) | 0.568 |
| Reason for ARDS | |||
| Pneumonia | 28/61 | 24/56 | 0.884 |
| Extrapulmonary sepsis | 10/61 | 15/56 | 0.252 |
| Severe acute pancreatitis | 0/61 | 1/56 | 0.972 |
| Post-cardiac operation | 14/61 | 8/56 | 0.231 |
| Others | 9/61 | 8/56 | 0.848 |
| Mild ARDS | 18/61 | 23/56 | 0.292 |
| Moderate ARDS | 28/61 | 25/56 | 0.960 |
| Severe ARDS | 15/61 | 8/56 | 0.161 |
| Other parameters | |||
| Heart rate | 98.0 (86.0, 113.0) | 103.0 (88.2, 120.8) | 0.287 |
| Mean arterial pressure | 82.0 (73.0, 94.0) | 87.5 (75.8, 99.2) | 0.242 |
| Received NE (n, %) | 53/61 (86.9%) | 53/56 (94.6%) | 0.151 |
| NE dose (ug/kg/min) | 0.1 (0.0, 0.3) | 0.1 (0.1, 0.2) | 0.715 |
| ScvO2 (%) | 73.7 (71.0, 81.7) | 76.2 (68.7, 81.6) | 0.953 |
| Pv-a CO2 (mmHg) | 4.6 (2.6, 6.6) | 4.3 (2.4, 7.0) | 0.923 |
| Arterial lactate (mmol/L) | 2.2 (1.4, 4.7) | 2.0 (1.4, 4.0) | 0.550 |
| White blood cell (10^9/L) | 9.8 (8.6, 11.3) | 10.3 (8.8, 12.8) | 0.287 |
ARDS, acute respiratory distress syndrome; NE, norepinephrine; ScvO2, central venous oxygen saturation; Pv-a CO2, venous-to-arterial carbon dioxide difference; APACHE II, Acute Physiology and Chronic Health Evaluation