Table 2.

Results of Weights-Adjusted Linear Regression Evaluating Effect of Predeployment Attention Deficit Hyperactivity Disorder (ADHD) on Posttraumatic Stress Disorder (PTSD) Symptom Severity During Deployment

Variable	b	95% CI	χ2a	df
Age (years)	0.005	[−0.013, 0.022]	0.28	1
Female sex (Reference: Male)	0.87	[0.58, 1.17]	33.31***	1
Race (Reference: White)			7.88*	3
Asian	0.60	[−0.07, 1.28]
Black	0.20	[−0.07, 0.47]
Others	0.44	[0.04, 0.84]
Education (Reference: High school degree)			0.27	2
GED	−0.04	[−0.40, 0.33]
College degree	−0.06	[−0.30, 0.18]
Prior deployments (Reference: None)			3.5	2
One	0.27	[−0.01, 0.55]
Two or more	0.17	[−0.10, 0.44]
Childhood maltreatment (raw score range: 1–5)	0.31	[0.12, 0.51]	9.78**	1
Predeployment PTSD (Reference: None)			123.71***	2
Lifetime, not current	1.92	[1.47, 2.37]
Current	3.20	[2.50, 3.90]
Deployment stress (raw score range: 0-16)	0.50	[0.45, 0.55]	364.2***	1
Deployment-acquired TBI	1.38	[1.04, 1.72]	62.33***	1
Predeployment ADHD	1.84	[1.27, 2.41]	39.72***	1

Note. df = degrees of freedom; GED = General Equivalency Diploma; TBI = traumatic brain injury.

^*p < .05.

^**p < .01.

^***p < .001.

^aN = 4,022