Table. Electronic Cigarette (e-Cigarette) Use Among Adults (N = 5,135), Montana Adult Tobacco Survey, 2013.

Characteristic	% (95% Confidence Interval)
Ever e-cigarette use	11.2 (9.1–13.2)
Age, y
18–34	22.5 (16.4–28.6)
35–54	9.8 (6.8–12.8)
≥55	4.1 (2.8–5.4)
Sex
Male	11.7 (8.4–15.0)
Female	10.7 (8.1–13.2)
Race
White	10.5 (8.3–12.6)
American Indian/Alaska Native	18.8 (11.6–26.0)
Cigarette smoking status
Current	55.6 (45.8–65.4)
Former	8.2 (5.4–11.1)
Never	1.7 (0.9–2.5)