Table 5.

Summary of Hierarchical Regression Analyses: Percent of Neurobehavioral Symptom Inventory Variance Accounted for by Number of Blasts before and after Accounting for Demographics and Post-Traumatic Stress Checklist, Civilian Version Score

	Regression 1 Step 1: Blast			Regression 2 Step 1: Demographics Step 2: Blasts			Regression 3 Step 1: PCL-C Step 2: Demographics Step 3: Blasts
Predictor	R2	p	β	R2 (or Δ)	p (or Δ)	β	R2 (or Δ)	p (or Δ)	β
PCL-C							0.666	<0.001	0.836
Demographics				0.046	<0.001		0.011	0.006
Blasts	0.030	<0.001	1.802	0.048	<0.001	2.323	0.009	<0.001	1.035

deployments. Demographic predictors were entered simultaneously in regressions two and three.

PCL-C, Post-traumatic Stress Checklist, Civilian version.