Table 2.

Smoking history (N=18).

Smoking history			Value
Age first started smoking (years), n (%)
	10-17	7 (39)
	18-24	10 (56)
	>25	1 (6)
Current smoker, n (%)
	Yes	14 (78)
	No (former smoker)	4 (22)
Cigarettes smoked per day, n (%)
	0 (former smoker)	4 (22)
	1-10	6 (33)
	11-20	7 (39)
	21-30	1 (6)
	>31	0 (0)
Minutes to first cigarette upon waking, n (%)
	N/Aa (former smoker)	4 (22)
	<5	4 (22)
	6-30	8 (44)
	31-60	2 (11)
	>60	0 (0)
Quit attempts (current smokers) (n=14), n (%)
	Yes	10 (71)
	No	4 (29)
Quit attempts within last 12 months (current smokers) (n=10), n (%)
	1-3 times	10 (100)
	3-6 times	0 (0)
	>6 times	0 (0)
Tobacco products used, n (%)
	Combustible cigarettes	18 (100)
History of electronic cigarettes used (n=14), n (%)
	None	10 (56)
	Yes	8 (44)
Other nicotine products used (n=14), n (%)
	None	10 (71)
	Other (patches, nicotrol inhalation system, and nicotine gum such as Nicorette)	4 (29)

^aN/A: not applicable.