Table 1

Demographic and clinical characteristics of patients studied

Characteristic
All studied patients
'High-scoring patients'
'Low-scoring patients'

Risk for development of PTSD, n (percentage)
65
18 (29%)
44 (71%)
PTSD score (mean ± SD)
28.1 ± 13.9
46.3 ± 8.9
20.6 ± 7.1a
Age, years (mean ± SD)
39 ± 15
41 ± 13
39 ± 15
Sex, n (male/female)
35/30
8/10
25/19
Period between discharge and study, months (mean ± SD)
57 ± 32
56 ± 33
59 ± 31
Lung Injury Score (mean ± SD)
3.2 ± 0.5
3.3 ± 0.5
3.2 ± 0.5
APACHE II score (mean ± SD)
16 ± 6
15 ± 4
16 ± 6
ICU length of stay, days (mean ± SD)
47 ± 32
59 ± 37.0
42 ± 29b
Duration of mechanical ventilation, days (mean ± SD)
30 ± 22
37 ± 22
27 ± 22
Cause of ARDS, n (percentage within group)



     Sepsis
13 (20)
5 (28)
8 (18)
     Pneumonia
28 (43)
7 (39)
20 (45.5)
     Multiple trauma
20 (31)
5 (28)
14 (32)
     Other
4 (6)
1 (6)
2 (4,5)
ECMO, n (percentage within group)
7 (11)
3 (17)
4 (9)
Current status of employment, n (percentage within group)



     Work/training
29 (46)
7 (39)
22 (50)
     Unemployed/working at home
5 (8)
1 (5.5)
4 (9)
     Retired
7 (10)
1 (5.5)
6 (14)
     Disabled
12 (18)
8 (44)
4 (9)b
     Others
6 (13)
1 (5.5)
5 (11)
     No data
3 (5)
-
3 (7)

In 2 patients (3%) there were no data for PTSD. PTSD, post-traumatic stress disorder; SD, standard deviation of the mean; 'high-scoring patients', patients with a Post-Traumatic Stress Syndrome 10-Questions Inventory (PTSS-10) score greater than or equal to the cutoff score of 35 points, indicating an increased risk of development of PTSD; 'low-scoring patients', patients with a PTSS-10 score below the cutoff score; APACHE, Acute Physiology and Chronic Health Evaluation; ICU, intensive care unit; ARDS, acute respiratory distress syndrome; ECMO, extracorporeal membrane oxygenation. Significance was assumed at a two-tailed p < 0.05. aSignificant difference; btrend.

Deja et al. Critical Care 2006 10:R147   doi:10.1186/cc5070