Table 3

Predictors of posttraumatic stress symptoms at one-year post ICU treatment

Univariate¹

Multivariate²

OR

CI

P value

OR

CI

P value

Age

1.00

0.98 to 1.02

0.811

Gender

1.45

0.74 to 2.85

0.276

Educational status³

0.33

0.14 to 0.76

0.009

0.38

0.15 to 0.95

0.038

Employment status⁴

2.55

1.17 to 5.52

0.018

Personality trait⁵

0.92

0.86 to 0.99

0.019

0.91

0.84 to 0.99

0.029

Memory of pain

1.49

1.14 to 1.96

0.004

1.46

1.05 to 2.04

0.025

Lack of control

1.41

1.05 to 1.89

0.021

Factual recall

5.50

1.86 to 16.29

0.002

6.61

1.41 to 30.97

0.017

Memory of feelings

1.77

0.90 to 3.48

0.098

Delusional memories

1.88

0.96 to 3.66

0.064

Cox & Snell R²/Nagelkerke R²

0.16/0.24

Not all patients answered every question. Therefore, 159 of the 194 patients were included in the multivariate analyses. Age and gender were controlled for in the multivariate analyses.

¹Univariate variables P < 0.20, age and gender are shown.

²Multivariable analysis, in P < 0.20, out P < 0.05.

³Educational status: low = 0, high = 1.

⁴Employment status before ICU stay: employed = 0, unemployed = 1.

⁵Personality trait: pessimism = low score; optimism = high score.

CI, confidence interval; OR, odds ratio.

Myhren et al. Critical Care 2010 14:R14   doi:10.1186/cc8870