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Table 2 Characteristics at diagnosis of ALI/ARDS

From: Clinical risk conditions for acute lung injury in the intensive care unit and hospital ward: a prospective observational study

Characteristic ALI ARDS P
Number 20 33  
Age, years; median (interquartile range) 70.5 (42–81.8) 60.5 (46.5–79.3) 0.436
Female sex, n (percentage) 13 (65.0) 21 (63.6) 1
McCabe score    
Non-fatal 14 (70.0) 23 (69.7)  
Ultimately fatal 5 (25.0) 9 (27.3) 0.927
Fatal 1 (5.0) 1 (3.0)  
Medical (versus surgical) admission 13 (65.0) 20 (60.6) 0.369
Antecedent clinical risk conditions, n (percentage)    
Sepsis 16 (80.0) 30 (90.9) 0.405
Pneumonia 10 (50.0) 15 (45.5) 0.783
Aspiration 1 (5.0) 1 (3.0) 1
Trauma 0 0 1
Transfusions 2 (10.0) 1 (3.0) 0.549
Pancreatitis 0 1 (3.0) 1
Pulmonary contusion 0 0 1
Shock 6 (30.0) 15 (45.5) 0.386
Other 1 (5.0) 0 0.377
On day of clinical risk development, median (IQR) or n (percentage)    
SAPS II 37.5 (24.0–47.8) 37 (28.0–41.5) 0.604
Mean arterial pressure (mmHg) 86 (71–103) 73 (65–85) 0.076
Multiple organ dysfunction score 2 (1–3.75) 6 (4–7) 0.008
Location, percentage on ward versus ICU 12 (60) 5 (15.2) 0.002
PaO2/FiO2, mmHg 229 (210–264) 98 (78.5–146) <0.001
Receiving mechanical ventilation, percentage 7 (35) 22 (66.7) 0.045
Tidal volume (ml) 600 (500–600) 550 (500–600) 0.615
Positive end-expiratory pressure, cmH2O 5 (5–8) 8 (5–10.5) 0.086
Ventilator mode, percentage volume-cycled ventilation 7 (100) 20 (91) 1
Days from clinical insult to ALI/ARDS diagnosis 0 (0–3) 2 (0–4) 0.14
  1. ICU, intensive care unit; ALI, acute lung injury (PaO2/FiO2 200 to 300 mmHg); ARDS, acute respiratory distress syndrome; SAPS, simplified acute physiology score; PaO2, partial pressure of arterial oxygen; FiO2, fractional concentration of inspired oxygen.