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TABLE 3

E-Cigarettes as a Proportion of All New Daily Tobacco Use in the 2017 Cohort

Sample SizeUS Population EstimateProgression to New Daily Tobacco Use in 2017 Cohort2019 E-Cigarette Dependence Scorea Among New Daily UsersPercentage of New Daily Users
Age GroupAny Daily UseDaily E-Cigarette Use
in 2017nN%%95% CIScore95% CIVaping E-Cigarettes
14–17 8585 16 252 616 6.3 4.8 4.4–5.2 17.4 16.5–18.3 75.4 
18–21 5587 15 350 099 6.3 4.1 3.5–4.8 16.9 15.9–18.8 64.9 
22–25 2987 13 800 964 5.3 2.1 1.5–2.7 16.4 14.8–17.9 39.0 
26–29 1878 13 232 687 5.4 1.2 0.7–1.9 13.9 11.2–16.2 21.2 
30–34 1563 16 876 203 3.5 0.8 0.5–1.3 15.4 11.8–18.9 21.9 
Total 20 600 75 512 569 5.3 2.6 2.4–2.8 16.7 16.0–17.3 48.9 
Sample SizeUS Population EstimateProgression to New Daily Tobacco Use in 2017 Cohort2019 E-Cigarette Dependence Scorea Among New Daily UsersPercentage of New Daily Users
Age GroupAny Daily UseDaily E-Cigarette Use
in 2017nN%%95% CIScore95% CIVaping E-Cigarettes
14–17 8585 16 252 616 6.3 4.8 4.4–5.2 17.4 16.5–18.3 75.4 
18–21 5587 15 350 099 6.3 4.1 3.5–4.8 16.9 15.9–18.8 64.9 
22–25 2987 13 800 964 5.3 2.1 1.5–2.7 16.4 14.8–17.9 39.0 
26–29 1878 13 232 687 5.4 1.2 0.7–1.9 13.9 11.2–16.2 21.2 
30–34 1563 16 876 203 3.5 0.8 0.5–1.3 15.4 11.8–18.9 21.9 
Total 20 600 75 512 569 5.3 2.6 2.4–2.8 16.7 16.0–17.3 48.9 
a

E-cigarette dependence score derived from 7 items based on Wisconsin Inventory of Smoking Dependence Motives framework3 that assesses craving, tolerance, and loss of control symptoms of dependence. Scores range from 7 to 35, with 7 indicating no dependence.

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