. 2018 Jan 5;13(1):e0190630. doi: 10.1371/journal.pone.0190630

Table 3. Associations of posttraumatic stress disorder (PTSD) symptom severity and perceived functional impairment with barriers to treatment in firefighters with current probable PTSD but who had not received treatment from any professional (n = 1,802)^a.

		Concerns about potential stigma			Perceived obstacles			Joint p value^a
		Adjusted OR (95% CI)		p value	Adjusted OR (95% CI)		p value	Joint p value^a
PTSD symptom severity
	Total PCL score, per 1-SD increase	1.16	(1.08–1.25)	<0.001	1.12	(1.05–1.21)	0.001	<0.001
	Total PCL score, per 10-point increase	1.19	(1.09–1.29)	<0.001	1.15	(1.05–1.25)	0.001	<0.001
Perceived functional impairment
	Not at all	1.00	(referent)	-	1.00	(referent)	-
	Somewhat	1.39	(1.04–1.86)	0.03	1.28	(0.95–1.71)	0.10	0.06
	Very	1.64	(1.20–2.25)	0.002	1.42	(1.03–1.95)	0.03	0.005
	Extremely	1.56	(1.06–2.30)	0.02	1.19	(0.80–1.75)	0.39	0.08

Note. PCL = Posttraumatic Stress Disorder (PTSD) Checklist; OR = odds ratio; SD = standard deviation; CI = confidence interval.

^a Age and rank were included as covariates, whereas years since employment was not included due to its collinearity with age (variance inflation factor = 9.1). Joint effect significance was derived from bivariate probit regression modeling [38].

Table 3. Associations of posttraumatic stress disorder (PTSD) symptom severity and perceived functional impairment with barriers to treatment in firefighters with current probable PTSD but who had not received treatment from any professional (n = 1,802)a.

Table 3. Associations of posttraumatic stress disorder (PTSD) symptom severity and perceived functional impairment with barriers to treatment in firefighters with current probable PTSD but who had not received treatment from any professional (n = 1,802)^a.