Table 3.

Results of Estimated Multinomial Probit Model

Variables		Coefficients				Marginal effects		VIF
		Next month		After next month		Next month	After next month
		β	Std. Error	β	Std. Error	ME	ME
Survey year (reference category: 2008)
	2012	0.401b	0.156	0.188	0.123	0.427b	0.055	1.05
First tobacco use (reference category: within the first 5 minutes)
	Within 5-30 minutes	-0.252	0.27	0.21	0.232	-0.47	0.201	2.13
	Within 31-60 minutes	-0.484c	0.287	0.282	0.226	-0.871b	0.279c	2.14
	61 minutes and later	-0.186	0.225	0.215	0.2	-0.381	0.193	2.8
Attempt to quit Tobacco (reference category: no)
	Yes	1.738a	0.162	0.932a	0.126	1.663a	0.284a	1.01
Frequency of tobacco use at home (reference category: never)
	Daily	-0.473b	0.19	-0.165	0.161	-0.522b	-0.021	1.42
	Weekly	-0.670c	0.395	-0.043	0.273	-0.913c	0.084	1.21
	Less than once a month	-0.125	0.379	0.335	0.325	-0.412	0.225	1.18
Awareness of anti-smoking messages (reference category: no)
	Yes	0.235	0.322	0.547b	0.235	-0.022	0.364b	1.04
Awareness of health warnings on cigarette packages (reference category: no)
	Yes	-0.884a	0.329	0.079	0.293	-1.108a	0.283	1.04
Exposure to stimulants that promote smoking (reference category: no)
	Yes	0.168	0.267	0.498b	0.221	-0.147	0.270b	1.01

^ap<0.01; ^bp<0.05; ^cp<0.10