Table 2. Statistics for Survival Analysis.

	All Subjects (n = 163)		IDU Only (n = 146)		IDU Caucasian Only (n = 140)
Parameter	Hazard Ratio	p	Hazard Ratio	p	Hazard Ratio	p
KIR3DL1 Hmz	3.439	0.0899	2.56	0.1999	2.806	0.1597
KIR3DL1/S1 Het	5.34	0.0299	4.261	0.05	4.395	0.0457
Age	0.982	0.3426	0.979	0.3081	0.98	0.3415
Gender	0.709	0.347	0.947	0.8921	1.01	0.9802

All hazard ratios and p values are reported as compared to the KIR3DS1 homozygous genotype. Five subjects were excluded due to lack of information about gender or date of birth. P values calculated using a Wald test.