Table 4

Characteristics of 32 patients according to ventilator support required

Variable

Non-ventilated

(n = 8)

Non-invasive ventilation

Initially intubated

(n = 16)

Successful (n = 2)

Failure (n = 6)

APACHE II score

Mean (SD)

9.5 (4.9)

4 to 16

9.5 (0.7)

9 to 10

15.3 (5.6)

10 to 24

15.2 (7.6)

8 to 38

IQR 25th to 75th

SOFA score

Mean (SD)

4.7 (1.7)

2.5 (0.7)*

8.1 (2.3)**

7.8 (3.5)

IQR 25th to 75th

3 to 7

2 to 3

5 to 11

4 to 16

Age, years

Mean (SD)

39.2 (14.7)

42.5 (13.4)

44.0 (15.1)

38.7 (14.0)

IQR 25th to 75th

17 to 58

33 to 52

10 to 57

16 to 70

Opacity lung quadrants

Mean (SD)

2.9 (1.2)

2.5 (2.1)

2.8 (0.9)

3.3 (1.1)

LDH, U/L

Mean (SD)

751 (361)

1140 (374)

918 (408)

2170 (3400)

IQR 25th to 75th

195 to 1166

880 to 1400

354 to 1450

440 to 12200

CK, U/L

Mean (SD)

2480 (4500)

2800 (3200)

4850 (4200)

2300 (3800)

IQR 25th to 75th

66 to 9300

500 to 5100

122 to 9400

207 to 10800

28-day mortality, n (%)***

0

0

2 (33)

4 (25)

* vs. ** P = 0.01

*** Two additional patients died by refractory hypoxemia after 31 and 65 days of mechanical ventilation.

APACHE II = Acute Physiology And Chronic Health Evaluation II; CK = creatine kinase; IQR = interquartile range; LDH = lactate dehydrogenase; SD = standard deviation; SOFA = Sequential Organ Failure Assessment.

Rello et al. Critical Care 2009 13:R148   doi:10.1186/cc8044