TABLE 3

Prevalence of Past 30 Days 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 Use: Exclusive, % (95% CI)Dual Use, % (95% CI)
200220162002201620022016
College studentsn = 5131n = 3707n = 5131n = 3707n = 5131n = 3707
 Overall23.5 (22.0–24.9)a10.4 (9.1–11.7)a3.6 (3.0–4.2)11.5 (10.1–12.9)a14.4 (13.3–15.6)8.7 (7.5–9.9)a
 Sex
  Male24.6 (22.4–26.8)a13.5 (11.3–15.6)a,b3.9 (3.1–4.8)11.0 (9.0–13.0)↑17.5 (15.6–19.4)b11.6 (9.4–13.7)a,b
  Female22.5 (20.6–24.3)a7.8 (6.2–9.3)a,b3.3 (2.6–4.0)11.9 (10.0–13.8)a11.7 (10.3–13.0)b6.3 (5.1–7.6)a,b
 Race and/or ethnicity
  Non-Hispanic white25.7 (24.0–27.3)a,b12.5 (10.6–14.4)a,b4.3 (3.5–5.0)a,b11.8 (9.9–13.7)a17.1 (15.6–18.6)b11.0 (9.3–12.8)a,b
  Non-Hispanic African American15.4 (12.1–18.6)a,b5.9 (3.6–8.3)a,b2.1 (1.0–3.3)a,b15.3 (10.9–19.6)↑9.1 (6.5–11.7)b8.1 (5.3–10.9)b
  Hispanic19.3 (13.8–24.9)a,b8.8 (6.1–11.5)b10.2 (7.2–13.3)↑7.3 (4.6–10.1)b5.9 (3.3–8.4)a,b
  Non-Hispanic other22.5 (16.9–28.2)a,b8.6 (5.2–12.0)a,b8.4 (4.9–11.9)↑8.9 (5.6–12.2)b4.3 (2.2–6.5)a,b
 Status
  Full-time28.0 (24.1–32.0)b9.2 (6.6–11.7)↓2.3 (1.3–3.4)b11.1 (7.8–14.4)↑15.4 (12.3–18.6)9.4 (6.7–12.2)↓
  Part-time22.6 (21.1–24.2)b10.7 (9.2–12.2)↓3.8 (3.2–4.5)b11.6 (10.1–13.1)↑14.2 (13.0–15.5)8.6 (7.2–9.9)↓
Noncollege individualsn = 6203n = 4502n = 6203n = 4502n = 6203n = 4502
 Overall33.6 (32.2–35.1)a17.7 (16.3–19.1)a3.2 (2.7–3.8)8.6 (7.5–9.6)a15.7 (14.6–16.8)13.0 (11.7–14.3)a
 Sex
  Male35.4 (33.3–37.5)a,b18.8 (16.8–20.7)a3.7 (2.8–4.6)9.3 (7.8–10.8)↑19.0 (17.3–20.6)b15.8 (13.9–17.8)a,b
  Female31.5 (29.5–33.5)a,b16.4 (14.3–18.4)a2.6 (2.0–3.3)7.7 (6.2–9.2)a11.8 (10.4–13.1)b9.4 (7.9–10.9)a,b
 Race and/or ethnicity
  Non-Hispanic white38.6 (36.7–40.4)a,b21.8 (19.7–23.9)a,b3.1 (2.4–3.7)a,b7.7 (6.3–9.1)a19.1 (17.6–20.6)b14.9 (13.1–16.8)a,b
  Non-Hispanic African American25.3 (21.9–28.6)a,b12.1 (9.4–14.8)a,b5.1 (3.6–6.7)a,b10.7 (8.0–13.5)↑11.8 (9.4–14.2)b12.1 (9.4–14.8)b
  Hispanic26.6 (23.1–30.0)a,b12.1 (9.4–14.8)b9.6 (7.2–12.1)↑9.8 (7.8–11.9)b9.9 (7.3–12.6)a,b
  Non-Hispanic other33.8 (26.7–41.0)a,b16.8 (11.9–21.7)a,b7.6 (4.4–10.8)↑14.3 (8.9–19.7)b10.5 (6.9–14.2)a,b
 Education
  Less than high school33.2 (30.9–35.5)16.3 (14.0–18.6)b3.0 (2.2–3.8)8.1 (6.2–10.0)↑16.9 (15.2–18.7)↓12.8 (10.5–15.1)
  High school33.7 (31.5–36.0)21.3 (18.9–23.7)b3.5 (2.5–4.4)8.3 (6.7–10.0)↑14.9 (13.3–16.5)12.5 (10.6–14.4)
  Some college or more34.5 (30.9–38.1)13.8 (11.2–16.4)b3.1 (1.9–4.3)9.5 (7.4–11.6)↑14.0 (11.3–16.6)13.9 (11.4–16.6)
  • ↑ indicates prevalence linearly increased during 2002 to 2016 (P < .05), and ↓ indicates prevalence linearly decreased during 2002 to 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 between college students and noncollege individuals (P < .05).

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