Table 1.

Weighted estimates of characteristics of PATH study youth who were tobacco naïve at wave 1 (2013–2014), and e-cigarette naïve at wave 2 (2014–2015), n = 6,470

	Unweighted N	Weighted % or mean	95% CI
Age at wave 1
12–14	4,313	66.2	65.5–67.0
15–17	2,157	33.8	33.0–34.6
Sex
Female	3,204	49.5	48.8–50.2
Male	3,266	50.5	49.8–51.2
Race/ethnicity
Non-Hispanic white	3,109	54.6	53.8–55.4
Hispanic white	1,359	15.8	15.0–16.6
Non-Hispanic black	937	14.4	13.9–15.0
Hispanic black	103	1.3	1.0–1.6
Non-Hispanic other race	580	9.4	9.0–9.9
Hispanic other race	382	4.5	4.0–5.1
Parent education
Less than high school	1,290	16.7	15.3–18.1
High school graduate	1,120	16.5	15.3–17.9
Some college	1,952	29.9	28.0–31.8
Bachelor’s degree or more	2,108	36.9	34.4–39.4
Region of U.S.
Northeast	927	17.1	16.6–17.6
Midwest	1,418	21.4	20.8–22.1
South	2,451	37.8	36.9–38.7
West	1,674	23.7	23.0–24.4
E-cigarette susceptibility at wave 1	2,382	36.3	34.9–37.8
E-cigarette initiation at wave 3	439	7.1	6.5–7.9
Cigarette initiation at wave 2	75	1.2	1.0–1.6
Other tobacco producta initiation at wave 2	128	2.1	1.7–2.5
Convenience store visits
None in past 30 days	1,965	30.1	28.7–31.5
1–3 times per month	2,270	36.0	34.7–37.2
1 × week or more often	2,235	33.9	32.6–35.3
Noticed retail e-cigarette ad	2,515	38.8	37.4–40.2
Has favorite e-cigarette ad	704	10.7	10.0–11.5
Best friends use e-cigarettes	1,134	17.0	15.8–18.3
Household member uses tobacco product	1,742	26.0	24.4–27.7
Sensation-seeking score (mean)	6,470	1.43	1.40–1.46

Data are weighted.

CI = confidence interval; NA = not applicable; PATH = Population Assessment of Tobacco and Health.

^aOther tobacco products included cigars (cigarillos, traditional and filtered), hookah, smokeless, snus, dissolvable, bidis, and kreteks).