Table 2

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

Demographic characteristicsHeard of e-cigarettesP value
Percentage(95% CI)
Overall48.5(46.0, 51.0)
Gender<0.0001
Male59.1(56.2, 61.9)
Female37.7(35.1, 40.4)
Age (year)<0.0001
15–2469.9(65.7, 73.9)
25–4462.5(59.1, 65.8)
45–6437.2(34.6, 39.9)
65+16.9(14.7, 19.4)
Residence<0.0001
Urban56.3(53.2, 59.3)
Rural37.0(33.8, 40.3)
Educational level<0.0001
Elementary school and below17.1(15.4, 18.9)
Middle school48.0(45.1, 50.8)
High school61.7(58.2, 65.0)
College/university or above77.0(73.7, 80.0)
Smoking status<0.0001
Never smoker42.8(40.1, 45.5)
Current smoker62.3(59.1, 65.5)
 Daily smoker62.5(59.0, 66.0)
 Occasionally smoker61.1(54.7, 67.5)
Former smoker51.3(47.6, 55.0)
Income(yuan)<0.0001
<30 00036.1(33.5, 38.7)
30 000–4999948.7(45.1, 52.3)
50 000–9999958.2(54.1, 62.4)
100 000 and above66.7(61.7, 71.8)