TABLE 1

Prevalence of Past 30 Days Smoked Tobacco Use, Marijuana Use, and Overall Tobacco and/or Marijuana Use Among Adults Aged 18 to 22 Years by College Enrollment Status (NSDUH, United States, 2002–2016)

	Smoked Tobacco: Overall, % (95% CI)		Marijuana Use: Overall, % (95% CI)		Smoked Tobacco and/or Marijuana Use, % (95% CI)
	2002	2016	2002	2016	2002	2016
College students	n = 5131	n = 3707	n = 5131	n = 3707	n = 5131	n = 3707
Overall	37.9 (36.3–39.5)^a	19.1 (17.5–20.8)^a↓	18.0 (16.8–19.3)	20.2 (18.5–21.9)↑	41.5 (39.8–43.1)^a	30.6 (28.7–32.6)^a↓
Sex
Male	42.1 (39.6–44.6)^a^,^b	25.0 (22.2–27.8)^a^,^b↓	21.4 (19.4–23.5)^b	22.6 (19.8–25.3)^b ↑	46.0 (43.5–48.6)^a^,^b	36.1 (33.0–39.1)^a^,^b↓
Female	34.1 (32.1–36.2)^b	14.1 (12.2–16.0)^a^,^b↓	15.0 (13.5–16.4)^b	18.2 (16.1–20.4)^b ↑	37.4 (35.3–39.5)^a^,^b	26.0 (23.5–28.5)^a^,^b↓
Race and/or ethnicity
Non-Hispanic white	42.8 (40.9–44.7)^a^,^b	23.5 (21.1–26.0)^a^,^b↓	21.4 (19.8–23.0)^b	22.8 (20.5–25.2)^b ↑	47.0 (45.1–48.9)^a^,^b	35.3 (32.6–38.1)^a^,^b↓
Non-Hispanic African American	24.4 (20.6–28.3)^a^,^b	14.0 (10.5–17.6)^a^,^b↓	11.2 (8.4–14.1)^a^,^b	23.3 (18.5–28.2)^b ↑	26.6 (22.6–30.5)^a^,^b	29.3 (24.2–34.3)^b ↑
Hispanic	26.7 (20.8–32.5)^a^,^b	14.7 (11.1–18.2)^a^,^b↓	9.5 (6.5–12.6)^b	16.1 (12.3–19.9)^b ↑	28.9 (23.0–34.8)^a^,^b	24.9 (20.6–29.2)^a↓
Non-Hispanic other	31.4 (25.3–37.5)^a^,^b	12.9 (8.9–16.8)^a^,^b↓	11.0 (7.4–14.5)^b	12.7 (8.7–16.7)^b	33.5 (27.3–39.6)^a^,^b	21.3 (16.3–26.3)^a^,^b↓
Status
Full-time	36.9 (35.1–38.6)	19.3 (17.4–21.1)↓	18.1 (16.7–19.4)	20.2 (18.3–22.0)↑	40.7 (38.9–42.5)	30.8 (28.7–33.0)↓
Part-time	43.5 (39.1–47.8)	18.6 (15.0–22.2)↓	17.8 (14.5–21.0)	20.6 (16.5–24.6)↑	45.8 (41.4–50.2)	29.7 (25.4–34.1)↓

Noncollege individuals	n = 6203	n = 4502	n = 6203	n = 4502	n = 6203	n = 4502
Overall	49.3 (47.7–50.9)^a	30.7 (29.0–32.5)^a↓	18.9 (17.7–20.1)	21.6 (20.1–23.2)↑	52.5 (50.9–54.1)^a	39.3 (37.5–41.2)^a↓
Sex
Male	54.4 (52.2–56.6)^a^,^b	34.6 (32.1–37.1)^a↓	22.7 (20.9–24.5)	25.1 (22.8–27.4)↑	58.1 (55.9–60.3)^a	43.9 (41.3–46.5)^a↓
Female	43.3 (41.1–45.4)^a^,^b	25.8 (23.4–28.1)^a↓	14.4 (13.0–15.9)	17.2 (15.2–19.2)↑	45.9 (43.8–48.1)^a	33.5 (30.9–36.1)^a↓
Race and/or ethnicity
Non-Hispanic white	57.7 (55.8–59.5)^a^,^b	36.7 (34.2–39.2)^a↓	22.2 (20.6–23.8)	22.6 (20.4–24.8)	60.7 (58.9–62.6)^a	44.4 (41.8–46.9)^a↓
Non-Hispanic African American	37.1 (33.4–40.8)^a^,^b	24.2 (20.6–27.8)^a↓	17.0 (14.2–19.7)^a	22.8 (19.2–26.4)↑	42.2 (38.5–46.0)^a	35.0 (30.9–39.0)↓
Hispanic	36.4 (32.7–40.1)^a^,^b	22.0 (18.5–25.5)^a↓	12.3 (9.9–14.7)	19.6 (16.2–23.0)↑	38.9 (35.1–42.6)^a	31.7 (27.7–35.6)^a↓
Non-Hispanic other	48.1 (40.6–55.7)^a^,^b	27.3 (21.6–33.1)^a↓	17.0 (11.4–22.5)	18.2 (13.5–22.8)	50.8 (43.3–58.3)^a	35.0 (28.8–41.2)^a↓
Education
Less than high school	50.2 (47.7–52.6)^b	29.1 (26.1–32.1)↓	19.9 (18.1–21.8)	21.0 (18.2–23.8)	53.1 (50.7–55.6)	37.2 (34.0–40.5)↓
High school	48.6 (46.2–51.0)^b	33.8 (31.1–36.6)↓	18.4 (16.5–20.2)	20.9 (18.5–23.2)↑	52.1 (49.7–54.5)	42.2 (39.3–45.1)↓
Some college or more	48.6 (44.8–52.3)^b	27.8 (24.5–31.2)↓	17.1 (14.2–19.9)	23.5 (20.4–26.6)↑	51.6 (47.9–55.4)	37.3 (33.7–40.9)↓

↑ indicates prevalence linearly increased during 2002–2016 (P < .05), and ↓ indicates prevalence linearly decreased during 2002–2016 (P < .05). Overall use of smoked tobacco was defined as use of cigarettes and/or cigars (big cigars, cigarillos, and/or little cigars) regardless of marijuana use. Overall use of marijuana was defined as use of marijuana (regardless of the mode of consumption) regardless of smoked tobacco use. CI, confidence interval.
↵a Results are significantly different between college students and noncollege individuals (P < .05).
↵b Responses vary significantly (P < .05) within the assessed demographic subgroups.