TABLE 4

Prevalence of Past 12 Months Exclusive Smoked Tobacco Use, Marijuana Use, and Dual Use Among Adults Aged 18 to 22 Years by College Enrollment Status (NSDUH, United States, 2002–2016)

Smoked Tobacco: Exclusive, % (95% CI)Marijuana: Exclusive, % (95% CI)Dual Use, % (95% CI)
200220162002201620022016
College studentsn = 5131n = 3707n = 5131n = 3707n = 5131n = 3707
 Overall23.2 (21.7–24.6)a12.2 (10.8–13.5)a5.5 (4.8–6.2)14.6 (13.1–16.1)a27.2 (25.7–28.7)20.0 (18.3–21.7)a
 Sex
  Male24.6 (22.3–26.8)a15.8 (13.6–18.0)b4.5 (3.5–5.4)b11.9 (9.8–13.9)b31.1 (28.7–33.4)b24.0 (21.3–26.8)a,b
  Female21.9 (20.1–23.7)a9.1 (7.5–10.7)b6.4 (5.3–7.4)a,b16.9 (14.8–19.0)b23.7 (21.9–25.6)b16.5 (14.4–18.7)b
 Race and/or ethnicity
  Non-Hispanic white24.8 (23.2–26.5)a,b14.8 (12.8–16.8)a,b5.5 (4.7–6.4)a14.4 (12.4–16.4)a,b31.2 (29.4–33.1)b24.3 (21.8–26.7)b
  Non-Hispanic African American16.6 (13.4–19.9)ab,5.9 (3.6–8.2)a,b6.9 (4.7–9.1)21.6 (16.9–26.2)a,b15.0 (11.8–18.2)a,b13.4 (9.8–17.0)a,b
  Hispanic22.1 (16.0–28.2)11.5 (8.6–14.4)b5.0 (2.6–7.5)13.7 (10.5–16.8)b18.3 (13.7–22.9)b16.1 (12.2–20.1)b
  Non-Hispanic other20.5 (15.0–26.0)8.3 (5.0–11.6)a,b9.7 (6.5–12.9)b22.8 (17.4–28.1)b14.9 (10.5–19.3)b
 Status
  Full-time26.6 (22.5–30.6)10.5 (7.8–13.2)↓4.4 (2.9–5.9)12.7 (9.3–16.0)↑26.5 (22.7–30.3)17.8 (14.1–21.6)↓
  Part-time22.6 (21.0–24.1)12.6 (11.1–14.1)↓5.7 (4.9–6.5)15.1 (13.4–16.7)↑27.3 (25.7–28.9)20.5 (18.6–22.5)↓
Noncollege individualsn = 6203n = 4502n = 6203n = 4502n = 6203n = 4502
 Overall30.7 (29.2–32.1)a17.4 (16.0–18.9)a4.6 (3.9–5.3)10.8 (9.6–12.0)a27.1 (25.7–28.4)23.4 (21.8–25.0)a
 Sex
  Male32.1 (30.0–34.1)a,b18.3 (16.3–20.3)↓4.7 (3.7–5.7)9.9 (8.3–11.4)↑31.1 (29.1–33.1)b28.1 (25.7–30.4)a,b
  Female29.0 (27.1–31.0)a,b16.3 (14.3–18.3)↓4.5 (3.6–5.4)a12.0 (10.2–13.8)↑22.3 (20.5–24.2)b17.4 (15.4–19.4)b
 Race and/or ethnicity
  Non-Hispanic white34.3 (32.5–36.0)a,b21.4 (19.3–23.5)a,b4.1 (3.3–4.9)a,b9.9 (8.3–11.5)a,b32.4 (30.6–34.1)b27.0 (24.7–29.3)b
  Non-Hispanic African American22.8 (19.5–26.0)a,b11.9 (9.2–14.6)a,b7.6 (5.7–9.6)b14.3 (11.4–17.3)a,b21.1 (17.9–24.3)a,b19.4 (16.0–22.8)a,b
  Hispanic27.4 (23.9–30.9)b13.0 (10.2–15.8)b4.0 (2.2–5.8)b11.3 (8.7–13.9)b17.5 (14.6–20.4)b17.9 (14.6–21.2)b
  Non-Hispanic other27.4 (20.8–34.0)b13.8 (9.5–18.2)a,b4.8 (2.0–7.7)b8.4 (5.2–11.6)b27.5 (20.6–34.5)b21.8 (16.4–27.3)b
 Education
  Less than high school30.8 (28.5–33.0)15.7 (13.4–18.0)b3.7 (2.7–4.6)b10.9 (8.8–13.1)↑27.6 (25.5–29.8)19.9 (17.2–22.6)b
  High school30.3 (28.2–32.5)20.1 (17.7–22.4)b5.4 (4.2–6.7)b9.8 (8.1–11.6)↑26.0 (23.9–28.1)25.0 (22.4–27.6)b
  Some college or higher31.3 (27.9–34.7)15.4 (12.7–18.1)b5.2 (3.6–6.9)b12.1 (9.7–14.4)↑28.2 (24.7–31.7)24.8 (21.6–28.0)b
  • Data are presented as % (95% CI). ↑ indicates prevalence linearly increased during 2002–2016 (P < .05), and ↓ indicates prevalence linearly decreased during 2002–2016 (P < .05). Exclusive use of smoked tobacco was defined as use of cigarettes and/or cigars (big cigars, cigarillos, and/or little cigars) without using marijuana. Exclusive use of marijuana was defined as use of marijuana (regardless of the mode of consumption) without using smoked tobacco. CI, confidence interval; —, estimates suppressed because of relative SE ≥30%.

  • a Results significantly differ from corresponding estimate among college and noncollege young adults (P < .05).

  • b Responses vary significantly (P < .05) within the assessed demographic subgroups.