Table 1.

Counts and percentage for ever-smoking at T2 in relation to e-cigarette use at T1 stratified by T1 willingness to smoke, among never-smokers at T1

	Willingness to smoke at T1
Never used e-cigs at T1	No	Yes
Never smoked at T2	780	92
(% nonsmokers)	(96%)	(86%)
Smoked at T2	35	15
(% smokers)	(4%)	(14%)
Used e-cigs at T1
Nonsmoker at T2	127	41
(% nonsmokers)	(81%)	(76%)
Smoker at T2	29	13
(% smokers)	(19%)	(24%)

Note. E-cig = e-cigarette. Willingness classification based on zero willingness vs. any willingness.