Table 2 Risk factors for acute respiratory distress syndrome
Parameter | ARDS | Mild | Moderate | Severe |
|---|---|---|---|---|
n = 527 | n = 51 | n = 250 | n = 226 | |
Risk factors for ARDS | ||||
 Intrapulmonary | 441 (83.7) | 37 (72.5) | 207 (82.8) | 197 (87.2) |
  Pneumonia | 402 (77.0) | 32 (64.0) | 183 (73.5) | 187 (83.9) |
  Aspiration | 17 (3.3) | 1 (2.0) | 11 (4.4) | 5 (2.2) |
  Drowning | 3 (0.6) | 0 (0.0) | 3 (1.2) | 0 (0.0) |
  Pulmonary contusion | 10 (1.9) | 3 (6.0) | 6 (2.4) | 1 (0.4) |
  Others | 9 (1.7) | 1 (2.0) | 4 (1.6) | 4 (1.8) |
 Extrapulmonary | 86 (16.3) | 14 (27.5) | 43 (17.2) | 29 (12.8) |
  Trauma | 8 (1.5) | 0 (0.0) | 7 (2.8) | 1 (0.4) |
  Extra pulmonary sepsis | 38 (7.3) | 7 (14.0) | 18 (7.2) | 13 (5.8) |
  Pancreatitis | 18 (3.4) | 5 (10.0) | 9 (3.6) | 4 (1.8) |
  Non-cardiogenic shock | 1 (0.2) | 0 (0.0) | 1 (0.4) | 0 (0.0) |
  Blood transfusion | 2 (0.4) | 1 (2.0) | 1 (0.4) | 0 (0.0) |
  Others | 23 (4.4) | 1 (2.0) | 10 (4.0) | 12 (5.4) |