Table 2.

Bivariate correlations.

		1	2.	3.	4.	5.	6.	7.	8.	9.	10.	11.	12.	13.	14.
1. Vape-pen Ever use		–	–	–	–	–	–	–	–	–	–	–	–	–	–
2.Vape-pen Knowledge		0.38⁎⁎	–	–	–	–	–	–	–	–	–	–	–	–	–
3. Gender		0.05	− 0.02	–	–	–	–		–	–	–	–	–	–	–
4. Race		− 0.06	0.01	0.02	–	–	–	–	–	–	–	–	–	–	–
5. Positive Ex.		0.22**	0.16*	− 0.03	− 0.18**	–	–	–	–	–	–	–	–	–	–
6. Drinks/drinking day		0.21**	0.19*	0.25**	− 0.11	0.03	–	–	–	–	–	–	–	–	–
7 Lack of premed		0.12	0.22**	0.10	− 0.05	0.08	0.11	–	–	–	–	–	–	–	–
8. Negative urgency		0.02	0.15*	0.01	0.06	− 0.13*	0.14*	0.08	–	–	–	–	–	–	–
9. Sensation seeking		0.06	0.06	0.15*	0.20**	− 0.09	0.23**	− 0.28**	0.26**	–	–	–	–	–	–
10. Social anxiety		− 0.04	0.05	− 0.02	− 0.10	0.29**	− 0.14*	0.12	0.09	− 0.24**	–	–	–	–	–
11. Inj. norm-peer		0.35**	0.24**	0.11	− 0.07	0.20**	0.29**	0.10	− 0.03	0.15*	0.01	–	–	–	–
12. Inj. norm-father		0.26**	0.22**	− 0.01	− 0.19**	0.19**	0.17**	0.17*	− 0.04	0.06	0.02	0.42**	–	–	–
13. MJ use		0.44**	0.29**	0.09	− 0.17**	0.29**	0.47**	0.19**	0.06	0.14*	− 0.01	0.54**	− 0.34**	–	–
14. Past week Cigarette Smoking		0.06	− 0.08	0.08	0.07	0.04	0.05	− 0.04	0.05	0.13*	− 0.10	0.03	− 0.07	0.15*	–
15. Lifetime cigarette Smoking		0.12	0.04	0.17**	0.02	0.07	0.23**	− 0.07	− 0.09	0.12	− 0.11	0.23**	− 0.15*	0.35**	0.32**

Notes: *p < 0.05; **p < 0.01; ever use = ever used a vape-pen; knowledge = vape-pen knowledge; Positive Ex. = positive expectancies; social anxiety = social interaction anxiety.

Log transformations: lack of premed = impulsivity-lack of premeditation; MJ use = marijuana use frequency; drinks per drinking day.

Square root transformation: negative urgency = impulsivity-negative urgency; Inj. norm-peer = injunctive norms-peer.

Inverse transformation: Inj. norm-father = injunctive norms-father, the direction of all correlations involving this variable were reversed to be in line with the raw version of the variable.

Cigarette smoking was binary (yes/no).