Table 2:

Correlations between independent variables of interest

Variable	Ethnicity, white	Sex, male	Age, yr	Recent drug use
Variable	Ethnicity, white	Sex, male	Age, yr	Cocaine	Crack	Heroin	Crystal methamphetamine	Cannabis	Alcohol
Ethnicity, white
Pearson correlation	1	0.004	−0.185	0.717	0.676	0.838	0.755	0.804	0.790
p value (2-tailed)	NA	0.888	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Sex, male
Pearson correlation		1	0.218	0.017	0.029	−0.018	−0.015	0.121	0.011
p value (2-tailed)		NA	< 0.001	0.559	0.310	0.532	0.606	< 0.001	0.714
Age, yr
Pearson correlation			1	−0.198	0.056	−0.110	−0.093	−0.152	−0.158
p value (2-tailed)			NA	< 0.001	0.052	< 0.001	0.001	< 0.001	< 0.001
Recent drug use^*
Cocaine
Pearson correlation				1	0.528	0.627	0.555	0.639	0.644
p value (2-tailed)				NA	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Crack
Pearson correlation					1	0.666^†	0.546	0.589	0.556
p value (2-tailed)					NA	< 0.001	< 0.001	< 0.001	< 0.001
Heroin
Pearson correlation						1	0.689	0.666	0.661
p value (2-tailed)						NA	< 0.001	< 0.001	< 0.001
Crystal methamphetamine
Pearson correlation							1	0.642	0.572
p value (2-tailed)							NA	< 0.001	< 0.001
Cannabis
Pearson correlation								1	0.658
p value (2-tailed)								NA	< 0.001
Alcohol
Pearson correlation									1
p value (2-tailed)									NA

Note: NA = not applicable.
↵* All drug-use variables refer to noninjection use in the preceding 6 months.