Table 2.

The Impact of Internalizing and Externalizing Symptomology on Adolescent 30-day E-cigarette Use. ^a

	Binary e-cigarette level (past 30-day use at baseline)				Binary e-cigarette trend (onset of 30-day use at follow-up)
	beta	SE	Z-stat	P-value	beta	SE	Z-stat	P-value
Sex	0.08	0.30	0.27	0.78	−0.04	0.08	−0.50	0.62
Black	−0.77	0.51	−1.50	0.13	−0.08	0.14	−0.59	0.56
Other	−0.03	0.42	−0.08	0.94	−0.17	0.12	−1.51	0.13
Ethnicity	−0.71	0.35	−2.03	0.04	0.23	0.10	2.36	0.02
Anxiety	−0.04	0.03	−1.50	0.13	0.01	0.01	1.53	0.13
Depression	0.01	0.02	0.46	0.64	0.01	0.01	0.89	0.38
Impulsivity	0.04	0.04	0.92	0.36	−0.01	0.01	−0.49	0.62
Sensation-seeking	0.06	0.03	2.20	0.03	0.01	0.01	1.36	0.17
Alcohol	1.87	0.37	5.10	<0.001	−0.07	0.10	−0.71	0.48
Marijuana	2.84	0.41	6.85	<0.001	−0.20	0.11	−1.85	0.07
Smoking	2.73	0.51	5.38	<0.001	−0.46	0.14	−3.32	<0.001
	Continuous e-cigarette level (number of days used/past 30 days at baseline)				Continuous e-cigarette trend (escalation in days used at follow-up)
	beta	SE	Z-stat	P-value	beta	SE	Z-stat	P-value
Sex	−0.35	0.18	−1.90	0.06	−0.02	0.05	−0.38	0.71
Black	−0.14	0.25	−0.58	0.56	−0.08	0.08	−0.99	0.32
Other	0.10	0.27	0.37	0.71	−0.02	0.09	−0.28	0.78
Ethnicity	−0.28	0.21	−1.33	0.18	0.14	0.06	2.39	0.02
Anxiety	0.03	0.02	1.27	0.21	−0.01	0.01	−2.00	0.05
Depression	−0.02	0.01	−1.64	0.10	0.01	0.00	1.99	0.05
Impulsivity	0.01	0.02	0.55	0.59	0.01	0.01	0.87	0.39
Sensation-seeking	0.01	0.02	0.56	0.58	0.00	0.00	0.32	0.75
Alcohol	0.43	0.21	2.09	0.04	−0.07	0.05	−1.20	0.23
Marijuana	0.67	0.22	3.07	<0.001	−0.01	0.06	−0.18	0.86
Smoking	0.61	0.24	2.62	0.01	−0.08	0.06	−1.19	0.23

^aNote: Sex (0 = male, 1 = female), Race (Black versus White; Other versus White), Ethnicity (Non-Hispanic, 0 = no, 1 = yes), alcohol use past 6 months (0 = no, 1 = yes), cigarette smoking past 6 months (0 = no, 1 = yes), and marijuana use past 6 months (0 = no, 1 = yes)