Table 1

Data on the study patients by subgroup

Parameter
Normal lung function (group N)
Primary lung disorder (group P)
Secondary lung disorder (group S)

n
19
16
10

Female sex (%)
36.8
31.3
30.0

Age (years)
49 ± 16
52 ± 17
52 ± 18

Height (cm)
176 ± 9
177 ± 10
169 ± 6

Weight (kg)
73.6 ± 11.6
76.4 ± 15.0
78.7 ± 27.3

PBW (kg)
69.8 ± 10.6
71.0 ± 10.8
64.4 ± 7.2

LIS
0.9 ± 0.5
2.4 ± 0.8
2.1 ± 0.3

Tint (hours)
20.2 ± 16.6
28.9 ± 46.9
30.1 ± 26.2

Survival (n/n [%])
16/19 (84%)
13/16 (81%)
4/10 (40%)

Baseline PEEP (cmH2O)
6.2 ± 2.1
11.3 ± 4.1**
11.1 ± 2.6**

Baseline Pao2/Fio2 ratio (kPa)
49.7 ± 11.9
26.1 ± 11.2**
32.7 ± 13.1*

Baseline compliance dynamic (ml/cmH2O)
50.3 ± 13.0
35.6 ± 12.1*
38.8 ± 12.2*

Predicted sitting EELV (l)
3.3 ± 0.4
3.4 ± 0.4
3.2 ± 0.2

Ventilation mode

     Pressure control
7
8
4

     Pressure support
5
6
6

     Volume control
1
0
0

     Pressure controlled – volume guaranteed
6
2
0

Unless otherwise stated, values are presented as mean ± standard deviation. The LIS (Murray) is based on dynamic compliance. *P = 0.05, **P = 0.001, versus group N. LIS, Lung Injury Score; PBW, predicted body weight; PEEP, positive end-expiratory pressure; Tint, time between intubation and inclusion.

Bikker et al. Critical Care 2008 12:R145   doi:10.1186/cc7125