Table 3

Percentage of Chinese adults ≥15 years old who used e-cigarettes by selected demographic characteristics

Demographic characteristics	Ever users of e-cigarettes		Users of e-cigarettes in the past 12 months		Current users of e-cigarettes
Demographic characteristics	Percentage	(95% CI)	Percentage	(95% CI)	Percentage	(95% CI)
Overall	5.0	(4.4, 5.6)	2.2	(1.8, 2.6)	0.9	(0.7, 1.2)
Gender
Male	9.3	(8.3, 10.4)	4.1	(3.4, 4.8)	1.6	(1.2, 2.1)
Female	0.5	(0.3, 0.7)	0.2	(0.1, 0.5)	0.1	(0.1, 0.4)
Age (year)
15–24	7.6	(5.8, 10.1)	4.4	(3.0, 6.5)	1.5	(0.8, 2.8)
25–44	6.2	(5.3, 7.3)	2.9	(2.3, 3.6)	1.2	(0.8, 1.7)
45–64	3.9	(3.4, 4.6)	1.2	(1.0, 1.6)	0.6	(0.5, 0.9)
65+	1.5	(1.1, 2.0)	0.2	(0.1, 0.4)	0.1	(0.0, 0.3)
Residence
Urban	5.3	(4.7, 6.1)	2.5	(2.1, 3.0)	1.1	(0.8, 1.5)
Rural	4.4	(3.7, 5.3)	1.6	(1.2, 2.3)	0.5	(0.3, 0.8)
Educational level
Elementary school and below	1.6	(1.2, 2.1)	0.4	(0.3, 0.7)	0.2	(0.1, 0.4)
Middle school	4.9	(4.2, 5.7)	1.5	(1.1, 1.9)	0.6	(0.4, 0.9)
High school	7.0	(5.4, 9.0)	2.9	(1.9, 4.5)	0.9	(0.5, 1.6)
College/university or above	7.2	(5.7, 9.0)	4.0	(3.0, 5.3)	2.2	(1.4, 3.3)
Smoking status
Never smoker	0.5	(0.2, 0.7)	0.2	(0.1, 0.4)	0.1	(0.0, 0.2)
Current smoker	15.9	(14.2, 17.6)	7.1	(5.9, 8.2)	3.0	(2.3, 3.8)
Daily smoker	16.6	(14.7, 18.5)	7.1	(5.7, 8.4)	3.2	(2.4, 4.1)
Occasionally smoker	10.6	(6.6, 14.6)	7.0	(3.3, 10.6)	1.7	(0.4, 2.9)
Former smoker	6.6	(4.3, 9.0)	1.8	(0.0, 3.7)	0.4	(0.0, 0.7)
Income(yuan)
<30 000	4.2	(3.3, 5.0)	1.5	(1.0, 2.1)	0.6	(0.3, 0.8)
30 000–49999	4.7	(3.7, 5.6)	1.8	(1.1, 2.5)	0.8	(0.3, 1.3)
50 000–99999	6.4	(5.1, 7.8)	3.0	(1.9, 4.0)	0.9	(0.4, 1.3)
100 000 and above	6.2	(4.6, 7.7)	3.8	(2.5, 5.0)	2.3	(1.3, 3.3)