Table 5.

Final seven-step regression model summary.

Step	Variable Added into Model	Adjusted R2	R2 change (p-value)	F (d.f.)	Model p-value
1	5-HTTLPR Genotypea	= .113	= .003**	(1,65) = 9.385	= .003**
2	TBI Statusb	= .186	= .011*	(2,64) = 8.549	= .001**
3	Genotypea by TBI Statusb Interaction	= .197	= .179	(3,63) = 6.390	= .001**
4	Co-Morbidity Factorc	= .519	< .001**	(4,62) = 18.817	< .001**
5	Genotypea by Co-Morbidity Factorc Interaction	= .514	= .591	(5,61) = 14.940	< .001**
6	CRIS-PLd	= .587	= .001**	(6,60) = 16.615	< .001**
7	Genotypea by CRIS-PLd interaction TBI Statusb by CRIS-PLd interaction	= .579	= .634	(8,58) = 12.352	< .001**

^*p < .05 but not meeting Bonferroni Correction of p ≤ .008.

^**p ≤ .008, meeting Bonferroni Correction.

^a5-HTTLPR Genotype: coded as 0 = L′ carrier, 1 = S′S′.

^bTBI Status: coded as 0 = no Traumatic Brain Injury (TBI), 1 = with TBI.

^cCo-Morbidity Factor is the single derived factor score accounting for the high inter-correlation between the PCL-C total score, CES-D total score, and NBSI total score.

^dCommunity Reintegration of Service Members Instrument - Perceived Limitations in Community Reintegration subscale.