. Author manuscript; available in PMC: 2014 Mar 27.

Published in final edited form as: Dev Psychopathol. 2012 Jul 24;25(1):223–239. doi: 10.1017/S0954579412000284

Table 2. Zero-Order Correlations among Alcohol, Marijuana, and Cigarette Use.

Variable	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
Alcohol use
1. Age 15-16	-
2. Age 17-18	.39^*	-
3. Age 19-20	.27^*	.43^*	-
4. Age 21-22	.16^*	.32^*	.49^*	-
5. Age 23-24	.15^*	.28^*	.36^*	.55^*	-
6. Age 25-26	.13^*	.30^*	.34^*	.42^*	.60^*	-
Marijuana use
7. Age 15-16	.40^*	.20^*	.12^*	.07^*	.05	.07	-
8. Age 17-18	.28^*	.36^*	.21^*	.14^*	.12^*	.11^*	.30^*	-
9. Age 19-20	.20^*	.25^*	.33^*	.17^*	.13^*	.15^*	.23^*	.37^*	-
10. Age 21-22	.15^*	.18^*	.22^*	.23^*	.20^*	.12^*	.18^*	.26^*	.43^*	-
11. Age 23-24	.12^*	.15^*	.16^*	.16^*	.21^*	.16^*	.16^*	.20^*	.31^*	.44^*	-
12. Age 25-26	.14^*	.19^*	.18^*	.13^*	.15^*	.19^*	.19^*	.25^*	.37^*	.38^*	.47^*	-
Cigarette use
13. Age 15-16	.44^*	.26^*	.14^*	.09^*	.07^*	.11^*	.44^*	.23^*	.19^*	.16^*	.13^*	.10^*	-
14. Age 17-18	.33^*	.39^*	.22^*	.16^*	.10^*	.11^*	.24^*	.32^*	.25^*	.22^*	.16^*	.14^*	.54^*	-
15. Age 19-20	.20^*	.29^*	.29^*	.17^*	.15^*	.14^*	.18^*	.19^*	.27^*	.22^*	.19^*	.18^*	.42^*	.58^*	-
16. Age 21-22	.20^*	.24^*	.22^*	.25^*	.17^*	.15^*	.13^*	.19^*	.22^*	.25^*	.18^*	.16^*	.37^*	.50^*	.66^*	-
17. Age 23-24	.20^*	.28^*	.22^*	.20^*	.25^*	.21^*	.12^*	.15^*	.19^*	.17^*	.19^*	.15^*	.36^*	.48^*	.62^*	.69^*	-
18. Age 25-26	.15^*	.25^*	.22^*	.24^*	.19^*	.22^*	.15^*	.16^*	.22^*	.21^*	.17^*	.20^*	.27^*	.45^*	.64^*	.67^*	.69^*

p < .05.