. Author manuscript; available in PMC: 2011 Mar 8.

Published in final edited form as: J Trauma Stress. 2010 Apr;23(2):282–287. doi: 10.1002/jts.20517

Table 2.

Hierarchical Linear Regression Analyses Predicting 6-week PTSD in Adherent Youth

Step	Variables	R²	ΔR²	B	SE B	β
Step 1		.31	.31^*
	Gender			18.13	6.73	.57^*
	Age ^a			−4.17	8.25	−.10

Step 2		.33	.03
	Gender			18.75	6.73	.59^*
	Age			−0.52	9.56	−.01
	Prior trauma PTSD severity			0.50	0.64	.19

Step 3		.40	.06
	Gender			22.23	7.18	.70^*
	Age			−2.81	9.58	−.07
	Prior trauma PTSD severity			0.63	0.64	.24
	Treatment condition ^b			8.87	7.13	.28

Significance of the regression model, F (4, 15) = 2.46, p = .09.
Step 4		.61^**	.21^*
	Gender			7.00	8.10	.22
	Age			−2.18	7.96	−.05
	Prior trauma PTSD severity			.35	.54	.13
	Treatment condition			−7.12	8.26	−.22
	Treatment × Gender			31.82	11.46	.72^*

Note. PTSD = Posttraumatic stress disorder

Consistent with prior psychophysiological research examining age/gender differences (Gunnar et al., 2009), age was dichotomized within gender such that girls over 12 years of age and boys over 14 years of age were coded as “1.”

Treatment was coded such that propranolol was “1” and placebo was “0”.

p < .05.

^**

p < .01.