Table 3.

Multivariate logistic regression analyses of survivor characteristics associated with mental health service utilization 5–15 months after the Utøya attack

				Model 1 (n = 251)			Model 2 (n = 280)
	Crude OR	95% CI	p-value	Adjusted OR	95% CI	p-value	Adjusted OR	95% CI	p-value
Female gender	1.77	(1.06-2.97)	0.029	1.26	(0.69-2.27)	0.452	1.16	(0.65-2.05)	0.615
Age	1.03	(0.96-1.09)	0.421	1.03	(0.96-1.11)	0.425	1.02	(0.95-1.09)	0.564
Predisaster MHS utilization	1.40	(0.78-2.52)	0.262	1.06	(0.55-2.06)	0.865	0.97	(0.52-1.84)	0.935
T1 PTSD (UCLA PTSD-RI)	2.49	(1.65-3.76)	<0.001	1.04	(0.48-2.25)	0.918
T1 Mental distress (SCL-8)	3.37	(2.06-5.52)	<0.001	2.81	(1.16-6.78)	0.022
T1 Somatic symptoms (CSSI-8)	2.95	(1.67-5.21)	<0.001	1.21	(0.56-2.63)	0.628
T2 PTSD (UCLA PTSD-RI)	2.61	(1.68-4.05)	<0.001				1.82	(0.87-3.79)	0.112
T2 Mental distress (SCL-8)	2.35	(1.48-3.73)	<0.001				0.67	(0.29-1.53)	0.338
T2 Somatic symptoms (CSSI-8)	5.54	(2.79-10.99)	<0.001				4.35	(1.75-10.83)	0.002

Both models adjusted for gender, age and predisaster MHS utilization; in addition model 1 adjusted for PTSD symptoms, mental distress and somatic symptoms at T1; model 2 for PTSD symptoms, mental distress and somatic symptoms at T2. OR = Odds ratio, CI = Confidence Interval.