Table 2:
Correlations between independent variables of interest
| Variable | Ethnicity, white | Sex, male | Age, yr | Recent drug use | |||||
|---|---|---|---|---|---|---|---|---|---|
| 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.