Table 2.

Multilevel regression models examining the associations between type of e-cigarette device used and study variables

Dependent variables	E-cigarette device type
	Disposable pod use	Refillable pod use		Other device type use*
	OR (95% CI)	OR (95% CI)	P value	OR (95% CI)	P value
Daily-e-cigarette use	ref	3.79 (1.57 to 9.11)	0.003†	5.80 (2.38 to 14.13)	<0.001†
Lifetime cigarette use	ref	1.86 (0.63 to 5.56)	0.26	0.76 (0.26 to 2.25)	0.61
Preferred nicotine level (mg/mL)	ref
First nicotine containing product
E-cigarette	ref	0.27 (0.09 to 0.81)	0.02†	0.37 (0.12 to 1.12)	0.08
Flavour preference
Mint	ref	0.17 (0.06 to 0.46)	<0.001†	0.16 (0.06 to 0.43)	<0.001†
Menthol	ref	0.34 (0.11 to 0.99)	0.05	0.36 (0.12 to 1.04)	0.06
Dependent variables	β (95% CI)	β (95% CI)	P value	β (95% CI)	P value
Preferred nicotine level (mg/mL)	ref	−14.90 (−20.34 to −9.46)	<0.001†	−35.87 (−41.25 to −30.48)	<0.001†

All models were adjusted for age, gender and ethnicity.

*Other devices include box mods and vape pens.

†Statistically significant after Benjamini-Hochberg corrections for multiple testing to control false-discovery rate at 0.05 (based on two-tailed corrected p value).