Table 3.

Hierarchical multiple linear regressions examining the effects of drug user type, psychopathic personality features, and “hot” neurocognitive impulsivity on sexual risk behavior.

	Past 30-day Sexual Risk Behaviors		Past 6-month Sexual Risk Behaviors		Lifetime Sexual Risk Behaviors
	ΔR2	β	ΔR2	β	ΔR2	β
Step 1: Control Variables	.02		.04		.16**
Step 2: Drug User Groups	.04		.04*		.13**
Amphetamine		.08		.12		.29**
Heroin		.22*		.25**		.36**
Polysubstance		.02		.14		.31**
Step 3: Main Effects of Psychopathy and “Hot” Impulsivity Composite	.04*		.07**		.06**
PCL:SV		.12		.32**		.32**
“Hot” Impulsivity		.16*		.07		−.06
Step 4: Drug User Group Interactions with Psychopathy and “Hot” Impulsivity Composite	.08**		.06*		.05*
Amphetamine × PCL:SV		−.31		−.32		−.34*
Amphetamine × “Hot” Impulsivity		.04		−.002		.02
Heroin × PCL:SV		−.01		−.39		−.33
Heroin × Hot” Impulsivity		−.13		−.06		−.05
Polysubstance × PCL:SV		−.48*		−.67**		−.61**
Polysubstance × Hot” Impulsivity		−.18*		−.08		−.04

Note.

^*p ≤ .05;

^**p < .01;

PCL:SV = Psychopathy Checklist: Screening Version