Table 5.

Linear regression analyses examining the relationship of post-traumatic stress symptom severity and depression with health care utilization

	Health care utilization
	βa: step 1	β: step 2	β: step 3	β: step 4	β: step 5
Age	−0.01	−0.01	−0.01	−0.02	−0.02
Educationb	−0.22	−0.18	−0.02	−0.02	0.03
CD4 count		−0.05	−0.04	−0.05	−0.04
Viral load (log)		0.06	0.06	0.04	0.05
On HAARTc		0.08	0.08	0.07	0.07
PTSD severity			0.17**	0.11*	0.10*
Depression symptoms				0.13*	0.07
PTSD × depression					0.123*
ΔF	0.13	1.03	13.51**	5.57**	5.27*
df	2,467	3,464	1,463	1,462	1,461
R2	0.001	0.007	0.035	0.047	0.058
ΔR2	0.001	0.006	0.028	0.012	0.011

^aAll β coefficients have been standardized

^bThe referent group is having less than a college education

^cThe referent group is not being on HAART

^*p < 0.05

^**p < 0.01