Table 1. Main characteristics of 73 patients with ARDS.
| Variable | Overall (n=73) | Survivors (n=44) | Non-survivors (n=29) | P value |
|---|---|---|---|---|
| Age (year) | 64 | 59 [46–78.5] | 75 [60–79] | 0.05 |
| Male | 57 (78.08) | 36 (81.8) | 21 (72.4) | 0.34 |
| Height (cm) | 169 | 170 [168–175] | 170 [165–172] | 0.25 |
| Weight (kg) | 69 | 70 [60–80] | 70 [65–70] | 0.78 |
| Primary cause of ARDS | ||||
| Pneumonia | 42 (57.53) | 25 (56.8) | 18 (62.1) | 0.66 |
| Aspiration | 8 (10.96) | 7 (15.9) | 1 (3.4) | 0.10 |
| Severe trauma | 5 (6.85) | 4 (9.1) | 1 (3.4) | 0.35 |
| Drowning | 2 (2.74) | 2 (4.5) | 0 | 0.24 |
| Sepsis | 12 (16.44) | 4 (9.1) | 7 (24.1) | 0.33 |
| Others | 4 (5.48) | 2 (4.6) | 2 (6.9) | 0.56 |
| ARDS severity | ||||
| Mild | 13 (17.81) | 8 (18.2) | 5 (17.2) | 0.92 |
| Moderate | 36 (49.32) | 22 (50.0) | 13 (44.8) | 0.67 |
| Severe | 24 (32.88) | 14 (31.8) | 11 (38) | 0.59 |
| Mechanically ventilated | 62 (84.9) | 37 (84.1) | 25 (86.2) | 0.80 |
| PaO2/FiO2 Day 1 (mmHg) | 170 [130–229] | 174 [126–231] | 187 [140–227] | 0.60 |
| PaO2/FiO2 Day 3 (mmHg) | 231 [183–310] | 267 [202–341] | 217 [148–274] | 0.03 |
| PaO2/FiO2 Day 7 (mmHg) | 241 [180–323] | 294 [213–357] | 205 [78–260] | 0.01 |
| APACHE II score | 25 [19–30] | 23.5 [16–29] | 27 [22–30] | 0.04 |
| SOFA score | 13 [10–17] | 13 [9–16] | 14 [11–19] | 0.14 |
| Murray score | 2 [1.6–2.7] | 2 [1.55–2.67] | 2.3 [1.67–3.0] | 0.50 |
| Ventilator days | 7 [3–12.5] | 6 [3–10.5] | 8 [3–17] | 0.34 |
| ICU stay | 13 [8.5–27] | 14.5 [9.5–28] | 11 [6–17] | 0.09 |
Continuous variables are presented as mean ± SD or median [interquartile range] if not normally distributed; categorical variables are presented as No. (%). ARDS, acute respiratory distress syndrome; APACHE II, acute physiology and chronic health evaluation II; SOFA, sepsis-related organ failure assessment; FiO2, fraction of inspired oxygen; ICU, intensive care unit; PaO2, partial pressure of oxygen in arterial blood.