American Academy of Pediatrics

TABLE 3

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

	Sample Size	US Population Estimate	Progression to New Daily Tobacco Use in 2017 Cohort			2019 E-Cigarette Dependence Score^a Among New Daily Users		Percentage of New Daily Users
Age Group	Sample Size	US Population Estimate	Any Daily Use	Daily E-Cigarette Use				Percentage of New Daily Users
in 2017	n	N	%	%	95% CI	Score	95% CI	Vaping 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 Size	US Population Estimate	Progression to New Daily Tobacco Use in 2017 Cohort			2019 E-Cigarette Dependence Score^a Among New Daily Users		Percentage of New Daily Users
Age Group	Sample Size	US Population Estimate	Any Daily Use	Daily E-Cigarette Use				Percentage of New Daily Users
in 2017	n	N	%	%	95% CI	Score	95% CI	Vaping 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

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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