Table 2:

Associations of e-cigarette ever use, current use, and days of use by current substance use and positive and negative e-cigarette outcome expectancies

	DV = Ever used e-cigarettes			DV = Current e-cigarette use			DV = # Days of e-cigarette use
Variables	AOR	95% CI	Pseudo R2 (ΔR2)	AOR	95% CI	Pseudo R2 (ΔR2)	β	R2 (ΔR2)
Step 1
Demographic
Age	1.02	0.90-1.17	0.38	0.99	0.87-1.13	0.35	−0.04	0.29
Gender: Men	1.19	0.32-4.38		2.58	0.73-9.10		0.22
PI ethnicity: Samoan	2.03	0.55-7.53		0.31	0.08-1.17		0.21
Formal education: Less than high school
High school graduate	1.63	0.41-6.56		1.40	0.35-5.58		−0.05
College or higher	2.26	0.38-13.37		0.96	0.17-5.31		−0.10
Marital status: Single	3.71	0.67-20.57		1.93	0.49-7.64		0.01
Substance use
Currently use cigarettes	1.96	0.62-6.18		1.06	0.33-3.41		0.03
Currently use alcohol	2.96	0.63-13.92		0.93	0.17-5.18		0.03
Currently use marijuana	5.54**	1.84-16.73		8.79**	2.89-26.75		0.38**
Step 2
Demographic
Age	1.01	0.87-1.18	0.55 (0.17)	0.97	0.85-1.12	0.45 (0.10)	−0.02	0.42 (0.13)
Gender: Men	0.84	0.17-4.12		2.50	0.63-9.92		0.16
PI ethnicity: Samoan	0.77	0.16-3.85		0.18**	0.04-0.77		0.14
Formal education: Less than high school
High school graduate	1.57	0.31-7.95		1.18	0.25-5.55		−0.09
College or higher	2.08	0.28-15.70		0.65	0.10-4.17		−0.19
Marital status: Single	4.65	0.69-31.25		2.13	0.51-8.79		0.02
Substance use
Currently use cigarettes	1.35	0.35-5.15		0.79	0.21-2.95		−0.04
Currently use alcohol	3.06	0.48-19.44		0.81	0.11-5.94		−0.08
Currently use marijuana	2.99	0.76-11.80		6.21**	1.74-22.18		0.34**
E-Cigarette expectancies
Positive expectancies	1.57**	1.18-2.11		1.43**	1.10-1.87		0.50**
Negative expectancies	1.07	0.81-1.43		0.99	0.75-1.30		−0.17

^**p < .01;

^*p < .05

DV = Dependent Variable; AOR = Adjusted Odds Ratio; CI = Confidence Interval; β = Standardized Regression Coefficient; Pseudo R² = Nagelkerke R²; ΔR² = Change in R² between Step 1 and Step 2