Table 2.
Correlations among Covariates, Predictors and Substance Use Outcomes Included in Regression Analyses
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. Age | - | −.08 | .18** | −.02 | .17** | .22** | .23** | .25** | .03 | .07 | .07 | .12 | .12 | .09 |
| 2. Family History | .01 | - | .01 | .15* | −.02 | .06 | −.25** | .11 | .06 | .20** | .18** | .12 | .14* | .14* |
| 3. Dep-Adol | .09 | .12 | - | .25** | .27** | .37** | .14* | .12 | .25** | .22** | .17** | .26** | .25** | .23** |
| 4. Dep-Par | .04 | .23** | .26** | - | .08 | .14* | .02 | .40** | .15* | .19** | .11 | .16** | .14* | .17** |
| 5. CU-Adol | .10 | −.02 | .22** | .04 | - | .15* | .24** | .04 | .13* | .13* | .08 | .10 | .08 | .11 |
| 6. CD-Adol | .26** | −.02 | .40** | .06 | .47** | - | .18** | .34** | .28** | .28** | .38** | .35** | .37** | .42** |
| 7. CU-Par | .15* | .01 | .11 | .12 | .31** | .43** | - | .12 | .05 | −.01 | .13* | .06 | .03 | .12 |
| 8. CD-Par | .20** | .14* | .15* | .29** | .26** | .43** | .38** | - | .09 | .15* | .07 | .09 | .09 | .09 |
| 9. Alcohol-Ons | .11 | .05 | .03 | .19** | .16** | .17** | .08 | .11 | - | .43** | .63** | .68** | .36** | .51** |
| 10. Marijuana-Ons | .19** | −.01 | .09 | .04 | .15* | .30** | .14* | .19** | .53** | - | .53** | .52** | .80** | .58** |
| 11. Impairment-Ons | .14* | −.05 | .13* | .08 | .20** | .28** | .09 | .10 | .62** | .79** | - | .62** | .52** | .79** |
| 12. Alcohol- | .13* | .01 | .20** | .18** | .26** | .29** | .08 | .09 | .66** | .46** | .62** | - | .63** | .79** |
| 13. Marijuana-Rec | .16** | .00 | .10 | .07 | .29** | .42** | .14* | .25** | .45** | .79** | .69** | .53** | - | .76** |
| 14. Impairment-Rec | .13* | −.07 | .15* | .09 | .31** | .36** | .11 | .15 | .56** | .71** | .88** | .69** | .78** | - |
Notes: Boys below diagonal, girls above diagonal; Family History = Family history of substance use across 1st and 2nd degree relatives (0=no, 1=yes); Dep = DISC depression symptom count from 6th grade; CU = APSD Callous-Unemotional scale administered in 6th grade; CD = DISC Conduct Disorder symptom count from 6th grade; Adol = Adolescent-report; Par = Parent-report; Ons = Onset of substance use or impairment by 9th grade? (0=no, 1=yes); Rec = number of visits (up to 9th grade) when any use or impairment was endorsed.
p < .05,
p < .01