Table 2.
Bivariate Pearson correlations among drug use variables and clinical symptom scores.
| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cocaine Cohort | Mediation Variables | 1. Age at initial cocaine use | -0.16* | -0.07 | 0.37** | -0.12 | -0.21 | -0.16 | -0.15 | -0.03 | -0.43** | |
| 2. Cocaine use consequences | 0.48** | 0.06 | 0.30** | 0.42** | 0.17 | 0.40** | 0.24** | 0.18* | ||||
| 3. Cocaine quit attempts | 0.28** | 0.18* | 0.28* | 0.36** | 0.46** | 0.22** | 0.33** | |||||
| 4. Current age | -0.08 | -0.31* | -0.09 | -0.16 | 0.21** | 0.68** | ||||||
| Clinical Symptom Scores | 5. BDI-II | 0.68** | 0.50** | 0.57** | 0.01 | 0.01 | ||||||
| 6. DASS depression | 0.48** | 0.64** | 0.13 | -0.17 | ||||||||
| 7. DASS anxiety | 0.67** | 0.03 | 0.02 | |||||||||
| 8. DASS stress | 0.09 | -0.06 | ||||||||||
| 9. Past-month use frequency | 0.22** | |||||||||||
| 10. Cocaine use duration | ||||||||||||
| Heroin Cohort | Mediation Variables | 1. Age at initial heroin use | -0.30** | 0.05 | 0.27** | -0.05 | -0.13 | -0.15 | -0.07 | -0.03 | -0.45** | |
| 2. Heroin use consequences | 0.32** | -0.16* | 0.25** | 0.37** | 0.26** | 0.38** | -0.04 | 0.07 | ||||
| 3. Heroin quit attempts | 0.20* | 0.06 | 0.17* | 0.05 | 0.14 | -0.07 | 0.15 | |||||
| 4. Current age | -0.24** | -0.24** | -0.12 | -0.14 | -0.06 | 0.74** | ||||||
| Clinical Symptom Scores | 5. BDI-II | 0.70** | 0.45** | 0.58** | -0.05 | -0.19* | ||||||
| 6. DASS depression | 0.48** | 0.72** | -0.07 | -0.13 | ||||||||
| 7. DASS anxiety | 0.60** | -0.03 | -0.01 | |||||||||
| 8. DASS stress | -0.04 | -0.08 | ||||||||||
| 9. Past-month use frequency | -0.04 | |||||||||||
| 10. Heroin use duration | ||||||||||||
Note: Bold values = statistically significant Pearson correlation: *p<.05, **p<.01, ***p<.001.