Table 4.

Predictors of marijuana vaping at one-year follow-up among baseline current e-cigarette users (n = 686)

		Parameter Estimate (Standard Error)	95% Confidence Interval
Demographics
Age		−0.05 (0.04)	−0.12 – 0.03
Female gender		0.02 (0.16)	−0.29 – 0.34
Ethnicity
	Asian	−0.14 (0.21)	−0.56 – 0.28
	Filipino	−0.50 (0.23)*	−0.95 – −0.05
	NHPI	−0.16 (0.22)	−0.58 – 0.25
	Other	0.30 (0.22)	−0.13 – 0.72
Two vs. four year college		0.19 (0.16)	−0.12 – 0.51
Family income		−0.02 (0.03)	−0.08 – 0.05
Sensation seeking		−0.004 (0.01)	−0.03 – 0.02
Past-30-day marijuana vaping frequency at baseline		0.14 (0.04)***	0.06 – 0.22
Baseline tobacco product and marijuana use frequencies
Past-30-day cigarette use		0.09 (0.04)**	0.02 – 0.17
Past-30-day e-cigarette use		0.02 (0.03)	−0.04 – 0.09
Baseline e-cigarette use characteristics
Nicotine concentration		0.12 (0.07)	−0.02 – 0.25
E-cigarette use dependence		0.02 (0.02)	−0.03 – 0.06
Device type
	Cigalike	−0.04 (0.07)	−0.17 – 0.09
	Ego-style tank systems	0.05 (0.07)	−0.09 – 0.20
	Mods	−0.04 (0.07)	−0.17 – 0.09
Baseline social network characteristics
No. of e-cigarette users		0.04 (0.03)	−0.02 – 0.10
No. of cigarette smokers		0.02 (0.03)	−0.04 – 0.08
No. of marijuana users		0.08 (0.07)	−0.05 – 0.21
No. of individuals who frequent vape shops		0.05 (0.02)*	0.0014 – 0.01
No. of individuals who know someone who works at a vape shop		0.05 (0.02)*	0.008 – 0.10
Direct marketing
Exposure through mail, e-mail, text messaging		−0.07 (0.11)	−0.28 – 0.15
Exposure through social media		−0.07 (0.13)	−0.32 – 0.18

^*p < 0.05;

^**p < 0.01;

^***p < 0.001