See data table below with 95% confidence intervals.Among students in grades 7-9, e-cigarette use (ever and in the past 30 days) varied significantly by smoking status192,193 (Figure 13.4).

Four out of five current smokers (83.4%)a had ever tried e-cigarettes, compared to about one in eight non-smokers (11.9%)b. Two-thirds (66.7%)c of current smokers had used e-cigarettes in the past 30 days, compared to just one in twenty non-smokers (4.8%)d.

When asked, “Which did you try first: smoking a cigarette or an e-cigarette (electronic cigarette)?”, nearly half (44.4%)e of students who had used both products reported using e-cigarettes first.

Between 2014-15 and 2016-17, while prevalence estimates appeared to increase, there was no significant change in ever use of e-cigarettes among current smokers, former smokers, experimental smokers, or never smokers194-197 (Table 13.2). Similarly, when considering e-cigarette use in the past 30 days, prevalence did not change significantly between 2014-15 and 2016-17 among current or former smokers,198,199 despite higher point estimates. However, past 30-day use of e-cigarettes increased significantly among experimental smokers and never smokers.200,201

See data table below with 95% confidence intervals.

Download table 13.2: Ever use and past 30-day use of e-cigarettes by smoking status*, grades 7-9, 2014-15 and 2016-17.xlsx  

95% confidence intervals for in-text estimates  

a: 83.4 [77.1-89.7]
b: 11.9 [10.5-13.4]
c: 66.7 [56.8-76.6]
d: 4.8 [4.0-5.7]
e: 44.4 [40.4-48.4]