Table 1.

Frequency distribution of past-year cigarette and e-cigarette use

	EC-Only Users (n=325)	Cigarette-Only Users (n=87)	Dual EC and Cigarette Users (n=207)
	EC Use	Cigarette Use	EC Use	Cigarette Use
Number of Times Used in the Past Year	Percent of Users	Percent of Users	Percent of Users	Percent of Users
1 time	27.08	21.84	8.21	11.59
2 times	20.62	13.79	9.18	15.46
3–10 times	27.69	33.33	33.33	31.88
11–20 times	8.31	9.20	15.94	12.56
More than 20 times	16.31	21.84	33.33	28.50