Table 1

Awareness, ever use and past month use of electronic nicotine delivery systems (ENDS) among US adults—ConsumerStyles 2010

Characteristic	Heard of ENDS (n=3057)		Ever use ENDS^* (n=249)		Past month use of ENDS^* (n=115)
Characteristic	% (95% CI)	OR (95% CI)	% (95% CI)	OR (95% CI)	% (95% CI)	OR (95% CI)
Sex
Male	35.4 (33.4 to 37.5)	1.34 (1.17 to 1.53)^†	6.5 (4.9 to 8.0)	0.59 (0.40 to 0.86)^†	3.6 (2.4 to 4.9)	1.03 (0.64 to 1.67)
Female	29.1 (27.0 to 31.1)	1	10.5 (7.9 to 13.2)	1	3.5 (2.5 to 4.6)	1

Age group (years)
18–24	41.0 (32.4 to 49.6)	3.90 (2.67 to 5.69)^†	10.1 (3.1 to 17.0)	1.30 (0.54 to 3.14)	^‡	0.46 (0.12 to 1.74)
25–34	40.5 (37.3 to 43.8)	3.83 (3.17 to 4.62)^†	9.2 (6.2 to 12.2)	1.17 (0.67 to 2.05)	3.7 (1.6 to 5.7)	0.69 (0.31 to 1.53)
35–44	37.1 (34.7 to 39.5)	3.31 (2.80 to 3.91)^†	6.9 (4.9 to 9.0)	0.87 (0.51 to 1.48)	2.9 (1.7 to 4.1)	0.54 (0.27 to 1.10)
45–54	33.9 (32.0 to 35.7)	2.88 (2.46 to 3.36)^†	9.2 (7.1 to 11.3)	1.18 (0.71 to 1.93)	4.8 (3.2 to 6.4)	0.91 (0.47 to 1.74)
55–64	25.6 (23.3 to 27.8)	1.93 (1.62 to 2.30)^†	5.9 (3.4 to 8.4)	0.73 (0.39 to 1.36)	3.1 (1.2 to 5.0)	0.59 (0.25 to 1.35)
65+	15.1 (13.4 to 16.8)	1	7.9 (4.8 to 11.1)	1	5.2 (2.5 to 7.9)	1

Race
Caucasian, NH	33.9 (32.1 to 35.7)	1	8.3 (6.4 to 10.1)	1	3.3 (2.3 to 4.3)	1
African–American, NH	25.8 (21.7 to 29.9)	0.68 (0.54 to 0.85)^†	8.9 (4.9 to 12.9)	1.08 (0.62 to 1.89)	5.8 (2.4 to 9.3)	1.79 (0.89 to 3.61)
Hispanic	28.5 (24.6 to 32.5)	0.78 (0.63 to 0.96)^†	8.2 (4.6 to 11.7)	0.99 (0.58 to 1.68)	3.1 (1.1 to 5.2)	0.94 (0.45 to 1.99)
Other	32.3 (26.7 to 38.0)	0.93 (0.71 to 1.22)	8.9 (4.5 to 13.3)	1.09 (0.60 to 1.97)	4.3 (0.9 to 7.8)	1.32 (0.55 to 3.19)

Income
<$15k	26.9 (23.2 to 30.6)	0.79 (0.61 to 1.03)	12.9 (5.8 to 20.0)	2.24 (1.25 to 4.02)^†	4.6 (1.7 to 7.5)	1.40 (0.68 to 2.89)
$15k–$24.9k	29.3 (24.1 to 34.4)	0.89 (0.72 to 1.09)	12.6 (6.7 to 18.5)	1.36 (0.82 to 2.28)	4.1 (1.6 to 6.6)	1.48 (0.74 to 2.97)
$25k–$39.9k	31.7 (27.6 to 35.7)	0.95 (0.80 to 1.13)	8.1 (4.7 to 11.4)	1.59 (0.92 to 2.77)	4.3 (1.9 to 6.8)	1.25 (0.58 to 2.69)
$40k–$59.9k	33.1 (29.8 to 36.5)	0.71 (0.57 to 0.87)	9.3 (5.1 to 13.5)	2.30 (1.17 to 4.51)^†	3.7 (1.3 to 6.1)	1.57 (0.73 to 3.35)
$60k+	34.3 (32.2 to 36.4)	1	6.0 (4.7 to 7.4)	1	3.0 (1.9 to 4.0)	1

Education
<HS	23.2 (17.0 to 29.5)	0.67 (0.47 to 0.96)^†	17.8 (5.4 to 30.2)	2.90 (1.13 to 7.45)^†	^‡	3.47 (1.15 to 10.46)^†
HS graduate	31.5 (28.3 to 34.6)	1.02 (0.85 to 1.21)	9.5 (6.2 to 12.7)	1.41 (0.81 to 2.45)	4.1 (1.9 to 6.3)	1.42 (0.70 to 2.85)
Some college	34.6 (32.0 to 37.2)	1.17 (1.01 to 1.36)^†	8.0 (5.9 to 10.1)	1.17 (0.71 to 1.92)	3.4 (2.2 to 4.5)	1.15 (0.67 to 1.99)
College graduate+	31.1 (29.0 to 33.2)	1	7.0 (4.3 to 9.6)	1	2.9 (1.8 to 4.1)	1

Region
Northeast	30.6 (27.0 to 34.1)	0.94 (0.75 to 1.16)	9.5 (4.9 to 14.2)	1.33 (0.71 to 2.51)	4.2 (1.7 to 6.6)	0.98 (0.46 to 2.09)
Midwest	35.1 (32.1 to 38.2)	1.15 (0.95 to 1.40)	8.6 (5.5 to 11.8)	1.19 (0.71 to 2.01)	2.8 (1.2 to 4.4)	0.65 (0.31 to 1.35)
South	31.1 (28.7 to 33.5)	0.96 (0.81 to 1.15)	8.1 (6.0 to 10.3)	1.11 (0.72 to 1.72)	3.5 (2.3 to 4.8)	0.83 (0.47 to 1.47)
West	32.0 (29.0 to 35.0)	1	7.3 (5.1 to 9.6)	1	4.2 (2.5 to 6.0)	1

Smoking status
Current smoker	49.6 (45.9 to 53.3)	2.50 (2.09 to 3.00)^†	18.2 (13.8 to 22.7)	5.71 (3.72 to 8.76)^†	6.3 (4.1 to 8.6)	3.06 (1.72 to 5.42)^†
Former smoker	30.7 (28.1 to 33.4)	1.13 (0.96 to 1.32)	6.2 (4.0 to 8.3)	1.68 (1.03 to 2.72)^†	2.9 (1.4 to 4.5)	1.36 (0.68 to 2.73)
Never-smoker	28.3 (26.2 to 30.3)	1	3.8 (2.7 to 4.9)	1	2.2 (1.3 to 3.1)	1

Tobacco use
Uses tobacco	45.1 (42.0 to 48.1)	2.06 (1.77 to 2.39)^†	17.2 (13.6 to 20.8)	5.55 (3.80 to 8.11)^†	7.1 (5.0 to 9.1)	4.21 (2.53 to 7.01)^†
Uses one product	41.8 (38.3 to 45.3)	1.81 (1.53 to 2.13)^†	14.7 (10.6 to 18.7)	4.59 (3.00 to 7.04)^†	4.3 (2.6 to 6.0)	2.48 (1.40 to 4.40)^†
Uses >1 product	51.2 (45.8 to 56.5)	2.63 (2.09 to 3.32)^†	21.1 (14.3 to 28.0)	7.17 (4.36 to 11.78)^†	11.4 (6.9 to 15.9)	7.10 (3.89 to 12.98)^†
No tobacco use	28.5 (26.7 to 30.2)	1	3.6 (2.6 to 4.6)	1	1.8 (1.1 to 2.5)	1

↵* Among those who had heard of ENDS.
↵† Significant at p<0.05.
↵‡ Unreliable estimate—data censored since relative SE >45%.
HS, high school; NA, not applicable; NH, non-Hispanic.