Variables | Early CS treatment (N = 85) | No early CS treatment (N = 156) | p value |
---|---|---|---|
Age | 61.0 (56.0–68.0) | 59.0 (49.0–65.5) | 0.211 |
Male gender | 52 (61.2) | 101 (64.7) | 0.674 |
APACHE II score | 24.0 (18.0–30.0) | 23.0 (17.0–29.0) | 0.129 |
BMI | 24.6 (22.1–28.1) | 24.8 (21.2–28.1) | 0.808 |
Comorbidity | |||
 Malignancy | 7 (8.2) | 22 (14.1) | 0.217 |
 Diabetes | 26 (30.6) | 43 (27.6) | 0.655 |
 Cerebrovascular disease | 8 (9.4) | 10 (6.4) | 0.445 |
 Chronic airway disease | 10 (11.8) | 11 (7.1) | 0.237 |
 End-stage renal disease | 7 (8.2) | 7 (4.5) | 0.257 |
 Congestive heart failure | 11 (12.9) | 15 (9.6) | 0.515 |
Influenza | 0.539 | ||
 Type A | 61 (71.8) | 118 (75.6) |  |
 Type B | 24 (28.2) | 38 (24.4) |  |
 PaO2/FiO2 ratio | 87.5 (56.0–142.3) | 84.0 (62.0–149.6) | 0.670 |
Severity of ARDS | 0.539 | ||
 Severe ARDS | 46 (54.1) | 95 (60.9) |  |
 Moderate ARDS | 32 (37.6) | 41 (26.3) |  |
 Mild ARDS | 7 (8.2) | 20 (12.8) |  |
Laboratory data | |||
 WBC count, ×103/μL | 9.6 (5.5–15.5) | 8.8 (5.9–13.0) | 0.253 |
 Hemoglobin, g/dL | 12.5 (10.5–14.2) | 11.9 (10.0–13.5) | 0.102 |
 Platelet count, ×103/μL | 150.0 (108.5–200.5) | 149.0 (102.0–210.0) | 0.770 |
 Albumin, g/dL | 2.9 (2.5–3.3) | 2.9 (2.5–3.2) | 0.670 |
 C-reactive protein, mg/dL | 14.1 (4.2–23.3) | 14.9 (6.7–23.0) | 0.727 |
 Bacterial coinfectionsa | 14 (16.5) | 17 (10.9) | 0.231 |
Specific treatment | |||
 Mechanical ventilation | 85 (100.0) | 156 (100.0) | 0.539 |
 Prone positioning or ECMO | 36 (42.4) | 56 (35.9) | 0.334 |
  Prone positioning | 29 (34.1) | 29 (18.6) | 0.011 |
  ECMO | 11 (12.9) | 30 (19.2) | 0.281 |
 Vasopressor infusion | 49 (57.6) | 72 (46.2) | 0.105 |
 Hemodialysis | 16 (18.8) | 24 (15.4) | 0.587 |
Clinical outcomes | |||
 Hospital mortality | 37 (43.5) | 30 (19.2) | < 0.001 |
 Hospital days in survivors | 24.8 (17.1–40.1) | 28.2 (19.1–44.4) | 0.475 |
 ICU days in survivors | 13.8 (8.4–23.0) | 14.8 (9.1–21.8) | 0.664 |
 Ventilator days in survivors | 11.9 (8.4–25.3) | 14.4 (7.8–21.7) | 0.953 |
 ICU-free days at Day 28 | 0.0 (0.0–15.2) | 9.2 (0.0–17.6) | 0.012 |
 Ventilator-free days at Day 28 | 0.0 (0.0–17.1) | 11.0 (0.0–19.6) | 0.009 |