Table 1.

Characteristics of sample, NSDUH 12–17 year olds, 2007–2011 (N= 91,152)

Variable	N	Weighted % (95% CI)
Tobacco use
Non-user	80,118	88.8 (88.5–89.0)
Cigars, smokeless tobacco a, and/or pipe only	2,345	2.4 (2.3–2.6)
Cigarettes only	5,452	5.6 (5.4–5.8)
Cigarettes + cigars, smokeless tobacco a, and/or pipe	3,237	3.2 (3.1–3.4)
Alcohol use disorder symptoms b
0–1 symptoms	83,967	94.5 (94.3–94.7)
≥ 2 symptoms	5,161	5.5 (5.3–5.7)
Marijuana use disorder symptoms b
0–1 symptoms	86,032	95.4 (95.3–95.6)
≥ 2 symptoms	4,365	4.6 (4.4–4.8)
Other illicit drug use disorder symptoms b
0–1 symptoms for one or more classes of drugs	84,553	97.7 (97.6–97.9)
≥ 2 symptoms for one or more classes of drugs	2,016	2.3 (2.1–2.4)
Sex
Male	46,573	51.1 (50.7–51.5)
Female	44,579	48.9 (48.5–49.3)
Race
Caucasian	53,808	58.1 (57.4–58.8)
African American	12,529	14.9 (14.5–15.3)
Hispanic	16,110	19.8 (19.2–20.4)
Other	8,705	7.3 (7.0–7.6)
Age
12–13 years	28,558	31.7 (31.3–32.1)
14–15 years	30,603	33.9 (33.5–34.3)
16–17 years	31,991	34.4 (34.0–34.8)
Income
<$20,000	15,595	16.6 (16.2–17.1)
$20,000 – $49,999	29,199	31.1 (30.5–31.7)
$50,000 – $74,999	17,175	17.8 (17.4–18.1)
$≥75,000	29,183	34.5 (33.8–35.2)
County metro status
Large metro	39,732	53.5 (52.7–54.2)
Small metro	31,361	30.4 (29.6–31.3)
Non-metro	20,059	16.1 (15.6–16.6)
Year
2007	17,727	20.4 (19.9–20.8)
2008	17,842	20.1 (19.6–20.6)
2009	17,705	19.8 (19.4–20.3)
2010	18,614	19.6 (19.1–20.1)
2011	19,264	20.1 (19.7–20.6)

^aSmokeless tobacco products include chewing tobacco or snuff.

^bMissing data not included in frequency calculations. 2,024 (2.2%) missing data for alcohol use disorder symptoms, 755 (0.8%) missing data for marijuana use disorder, 4,583 (5.0%) missing data for other drug use disorder.