TABLE 2.

Prevalence Rates (n and %) for E-Cigarettes and Other Substance Use

Frequency	Frequency of E-Cigarette Use		Past-Month E-Cigarette Use
Never	1376	71%	None	1594	82%
1–2 times	164	9%	Once	124	7%
3–4 times	221	11%	Twice	59	3%
Yearly	40	2%	≥3 times	157	8%
Monthly	58	3%
Weekly	45	2%
Daily	33	2%
Frequency	Frequency of Cigarette Use		Frequency of Alcohol Use		Frequency of Marijuana Use		Past-Month Heavy Drinking
Never	1652	85%	1026	53%	1591	82%	None	1709	88%
1–2 times	121	6%	403	21%	99	5%	Once	121	6%
3–4 times	74	4%	236	12%	73	4%	Twice	41	2%
Yearly	29	2%	166	9%	60	3%	≥3 times	66	4%
Monthly	29	2%	72	4%	45	2%
Weekly	15	<1%	25	1%	37	2%
Daily	16	<1%	7	<1%	28	2%

N for rates = ~1930.