TABLE 1

Sample Characteristics and Substance Use Prevalence, Overall and Stratified by E-cigarette Use Status Among Never Marijuana Users at Wave 1, PATH Study 2013–2015

Marijuana Never Users at Wave 1TotalWave 1 E-cigarette Ever Use
n = 10 364No, n = 9820Yes, n = 511Pa
CharacteristicsnWeighted % (95% CI)bnWeighted % (95% CI)bnWeighted % (95% CI)b
Age, y<.0001
 12–14590155.6 (54.7–56.6)570356.9 (55.9–57.9)17731.7 (27.8–35.8)
 15–17446344.4 (43.4–45.3)411743.1 (42.1–44.1)33468.3 (64.2–72.2)
Sex<.0001
 Male529851.2 (50.2–52.1)497150.6 (49.7–51.6)30760.2 (55.9–64.4)
 Female506648.8 (47.9–49.8)484949.4 (48.4–50.3)20439.8 (35.6–44.1)
Race and/or ethnicity.0205
 NH white507955.1 (54.1–56.0)478354.7 (53.7–55.7)28461.5 (57.3–65.7)
 NH African American141813.9 (13.2–14.5)136114.0 (13.3–14.7)5011.4 (8.8–14.5)
 Hispanic293221.7 (20.9–22.5)279021.8 (21.0–22.6)12919.5 (16.3–23.1)
 NH others9359.4 (8.8–9.9)8869.5 (8.9–10.1)487.6 (5.6–10.3)
Grade performance<.0001
 A280729.2 (28.1–30.4)273930.0 (28.9–31.2)6514.7 (11.7–18.3)
 B452843.4 (42.2–44.5)430643.5 (42.4–44.6)21342.3 (37.7–46.9)
 C or below298627.4 (26.3–28.6)273326.5 (25.4–27.6)23243.1 (38.7–47.6)
Parental education.0110
 Less than high school209717.5 (16.3–18.8)198517.4 (16.2–18.7)10017.5 (14.1–21.6)
 High school graduate187417.4 (16.3–18.6)175217.2 (16.0–18.4)11521.5 (17.6–26.0)
 Some college325631.5 (30.0–33.0)306431.3 (29.7–32.8)18336.1 (31.8–40.6)
 Bachelor’s degree or greater306833.6 (31.4–35.9)295334.1 (31.8–36.5)11024.9 (20.2–30.3)
Region.0110
 Northeast148216.5 (15.8–17.2)142216.7 (16.0–17.5)5913.4 (10.7–16.8)
 South231421.8 (21.1–22.7)219321.9 (21.0–22.7)11421.1 (17.7–25.0)
 Midwest393238.1 (37.2–39.0)369937.7 (36.8–38.7)21844.8 (40.1–49.5)
 West263623.6 (22.8–24.4)250623.7 (22.9–24.6)12020.6 (17.4–24.4)
E-cigarette ever use
 No982094.9 (94.5–95.4)9820100.0
 Yes5115.1 (4.6–5.5)511100.0
Cigarette ever use<.0001
 No973294.0 (93.3–94.6)941696 (95.6–96.5)28555.7 (51.1–60.3)
 Yes6196.0 (5.4–6.7)3934.0 (3.5–4.4)22544.3 (39.7–48.9)
Alcohol ever use<.0001
 No722669.0 (67.6–70.4)701370.7(69.3–72.1)18536.1 (31.5–40.9)
 Yes308831.0 (29.6–32.4)275929.3 (27.9–30.7)32563.9 (59.1–68.5)
Nonmedical use of prescription drugsc.0011
 No946792.7 (92.1–93.3)899292.9 (92.3–93.5)44689.2 (86.2–91.6)
 Yes7437.3 (6.7–7.9)6847.1 (6.5–7.7)5710.8 (8.4–13.8)
Other illicit drug ever used<.0001
 No10 25599.8 (99.7–99.8)972599.8 (99.7–99.9)50099.0 (97.8–99.6)
 Yes290.2 (0.2–0.3)220.2 (0.1–0.3)71.0 (0.4–2.2)
Sensation seeking (mean and SE)e10 1642.54 ± 0.0196332.51 ± 0.015023.08 ± 0.05<.0001
  • —, not applicable.

  • a Rao-Scott χ2 test was performed to compare the distribution of sample characteristics and substance use by e-cigarette use status at wave 1.

  • b Researchers of the PATH study oversampled adult tobacco users, young adults aged 18–24 y, and African Americans, so weighted estimates were calculated to reflect the prevalence in population.

  • c Prescription drugs include Ritalin, Adderall, painkillers, sedatives, or tranquilizers.

  • d Other illicit drugs include cocaine or crack, stimulants like methamphetamine or speed, heroin, inhalants, solvents, or hallucinogens.

  • e Sensation seeking was based on 5-point scales, labeled “strongly disagree,” “disagree,” “neither agree nor disagree,” “agree,” and “strongly agree.”