Table 3 Comparison of clinical and ventilator data by survival status

Demographics

   Age (years) (mean ± standard deviation)

55 ± 18

56 ± 14

0.76

   Gender (% male)

55

57

0.89

   Race (% Caucasian)

59

67

0.44

   Sepsis as acute lung injury risk (%)

28

57

0.04

Clinical variables (mean ± standard deviation)

   Simplified Acute Physiology Score II

42 ± 13

52 ± 13

0.02

   Acute Physiology and Chronic Health Evaluation II

21 ± 6

24 ± 6

0.14

   Lung injury score

2.9 ± 0.5

2.7 ± 0.6

0.32

Ventilator variables

   Plateau pressure (cmH₂O)

26 ± 8

24 ± 5

0.48

   Quasistatic respiratory compliance (ml/cmH₂O)

32 ± 10

30 ± 11

0.60

   PaO₂/FiO₂ ratio

150 ± 65

162 ± 82

0.54

   Oxygenation index

14 ± 10

12 ± 8

0.50