Table 2.

Correlation matrix of key study variables

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
1 Past 6-mo Any Substance Use at Follow-Up
2 Past 6-mo Alcohol at Follow-Up	.67
3 Past 6-mo Marijuana at Follow-Up	.53	.48
4 Past 6-mo Tobacco Use at Follow-Up	.81	.53	.55
5. CP	.32	.30	.36	.34
6. MDD	.14	.12	.08	.11	.21
7. GAD	.08	.06	.04	.08	.16	.42
8. PD	.10	.07	.07	.09	.19	.49	.37
9. SP	.03	.00	−.04	−.01	.06	.41	.45	.35
10. OCD	.07	.05	.04	.04	.15	.41	.35	.39	.37
11. Gender	−.00	−.03	.00	.01	−.02	−.20	−.05	−.12	−.16	−.08
12. Ethnicity	.02	−.01	.04	.04	.03	.01	−.01	.00	−.00	−.00	.47
13. Parental Education	−.01	−.03	.03	.00	.01	−.01	−.01	−.03	−.02	.00	.18	.14
14 Past 6-mo Any Substance Use at Baseline	.48	.42.	.41	.45	.39	.13	.13	.13	.01	.06	.02	.01	−.05
15. Past 6-mo Alcohol at Baseline	.37	.42	.36	.37	.37	.13	.11	.12	−.00	.06	−.00	.03	.01	.53
16. Past 6-mo Marijuana at Baseline	.31	.32	.45	.40	.43	.10	.08	.10	−.01	.06	.00	.03	.01	.53	.44
17. Past 6-mo Tobacco Use at Baseline	.37	.34	.40	.46	.42	.11	.10	.12	−.01	.08	−.00	.02	−.01	.67	.47	.64

Note. All coefficients are Pearson correlations except the correlation between Parental Education and all other variables are Spearman correlations, as Parental Education is an ordinal variable. Shaded cells note correlations that were not statistically significant at p < .05. Ns range from 3,028 to 3,313. CP = Conduct Problems. Gender is coded as male = 1 and female = 0. Ethnicity is coded as Hispanic = 1, Non-Hispanic = 0. Parental Education is coded as 1 = High school education or less, 0 = At least some college education