Risk factors for post-traumatic stress disorder symptoms following critical illness requiring mechanical ventilation: a prospective cohort study

Table 2 Factors associated with post-traumatic stress disorder symptoms at six-month follow-up

	Univariate analysis^a		Multivariable analysis^b
Factor	rho	p value	B (95% CI)	p value
Age in years	-0.297	0.05	Non-linear effect^c	0.04
APACHE II	0.039	0.80	0.02 (-0.32, 0.37)	0.90
Duration of delirium in days	0.030	0.84	0.91 (-0.82, 2.63)	0.31
Total lorazepam dose (in 10 mg intervals)	0.300	0.05	0.39 (0.17, 0.61)	0.001
Female gender			7.36 (1.62, 13.11)	0.02
Median PTSS-10 score (IQR) by gender
Female	22 (16–35)	0.06^d
Male	17 (12–27)

^aSpearman correlation coefficients (rho) unless otherwise noted. ^bMultiple linear regression with B representing regression coefficients. ^cSee Figure 2. ^dWilcoxon rank-sum tests were used. APACHE II, Acute Physiology and Chronic Health Evaluation II; CI, confidence interval; IQR, interquartile range; PTSS-10, Post-Traumatic Stress Syndrome 10-Questions Inventory.

ISSN: 1364-8535