Table 6.

Multinomial logistic models predicting the likelihood of exclusive smoking, exclusive vaping and dual use in University of Queensland (UQ) and New Zealand (NZ) students

	UQ			NZ
	P value	OR	95% CI	P value	OR	95% CI
Dual user versus non-user
<25 years		Ref			Ref
≥25 years	0.475	1.27	0.66 to 2.45	0.327	1.54	0.65 to 3.62
Female		Ref			Ref
Male	<0.001	3.05	1.63 to 5.70	0.002	3.21	1.53 to 6.71
International		Ref			Ref
Domestic	0.978	1.01	0.53 to 1.94	0.564	1.29	0.55 to 3.01
Exclusive smoker versus non-user
<25 years		Ref			Ref
≥25 years	0.867	1.02	0.81 to 1.29	0.136	0.68	0.41 to 1.13
Female		Ref			Ref
Male	<0.001	2.30	1.86 to 2.83	<0.001	2.51	1.79 to 3.52
International		Ref			Ref
Domestic	0.017	0.77	0.62 to 0.95	0.569	1.13	0.75 to 1.69
Exclusive vaper versus non-user
<25 years		Ref			Ref
≥25 years	0.110	1.64	0.89 to 2.99	0.004	2.13	1.27 to 3.56
Female		Ref			Ref
Male	<0.001	9.14	4.26 to 9.63	0.002	2.00	1.30 to 3.08
International		Ref			Ref
Domestic	0.105	1.77	0.89 to 3.53	<0.001	3.75	1.88 to 7.49

Ref, reference category.