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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: J Psychiatr Res. 2011 Jul 13;45(11):1453–1462. doi: 10.1016/j.jpsychires.2011.06.012

Table 2.

Prevalence of SUDs among psychiatric patients aged 2–17 years by sex, race, and age group (N=11,457)

Ages 2–12 yrs
Mean age1
Overall
N=6210
Male
8.1 yrs
Female
8.4 yrs*
White
8.2 yrs
Black
8.2 yrs
Inpatient
9.7 yrs
Outpatient
8.0 yrs*

Proportion %, 95% CI %, 95% CI %, 95% CI %, 95% CI %, 95% CI %, 95% CI %, 95% CI
Cannabis 1.3, 1.0–1.6 1.6, 1.2–2.0 0.8, 0.4–1.1* 1.2, 0.8–1.5 1.9, 1.3–2.5 7.1, 5.3–8.9 0.4, 0.3–0.6*
Alcohol 0.6, 0.4–0.8 0.7, 0.4–0.9 0.4, 0.1–0.7 0.7, 0.4–1.0 0.5, 0.2–0.7 2.9, 1.7–4.1 0.2, 0.1–0.4*

Number of SUDs
  1 1.0, 0.8–1.3 1.2, 0.9–1.6 0.7, 0.4–1.1 0.7, 0.4–1.0 1.7, 1.1–2.2* 5.8, 4.2–7.5 0.4, 0.2–0.5*
  2+ 0.6, 0.4–0.8 0.8, 0.5–1.0 0.4, 0.1–0.7 0.9, 0.5–1.2 0.5, 0.2–0.8 3.6, 2.3–4.9 0.2, 0.1–0.3*

Ages 13–17 yrs
Mean age1
Overall

N=5247
Male

15.1 yrs
Female

15.2 yrs
White

15.2 yrs
Black

15.0 yrs
Inpatient

15.1 yrs
Outpatient

15.2 yrs

Cannabis 21.2, 20.1–22.3 30.1, 28.4–31.8 12.0, 11.0–13.0* 20.6, 19.1–22.2 21.0, 19.2–22.9 22.5, 20.6–24.3 20.5, 19.1–21.9
Alcohol 10.9, 10.1–11.8 14.4, 13.1–15.7 7.3, 6.3–8.3* 14.2, 12.8–15.5 5.3, 4.3–6.3* 9.8, 8.5–11.1 11.6, 10.5–12.7
Nicotine 2.9, 2.4–3.3 4.2, 3.4–4.9 1.5, 1.0–1.9* 4.3, 3.5–5.1 0.8, 0.4–1.2* 2.1, 1.5–2.8 3.3, 2.7–3.9
Cocaine 2.7, 2.3–3.2 2.8, 2.2–3.5 2.6, 2.0–3.3 3.4, 2.7–4.1 1.8, 1.2–2.4* 4.0, 3.2–4.9 2.0, 1.5–2.4*
Opioid/heroin 2.1, 1.7–2.5 3.1, 2.5–3.8 1.1, 0.7–1.4* 3.3, 2.6–4.0 0.4, 0.1–0.6* 2.1, 1.5–2.8 2.1, 1.6–2.6
Sedative2 0.9, 0.7–1.2 1.3, 0.9–1.8 0.5, 0.2–0.7* 1.3, 0.9–1.8 0.1, 0–0.2 1.0, 0.5–1.4 0.9, 0.6–1.2
Polysubstance 0.9, 0.6–1.1 1.2, 0.8–1.6 0.5, 0.3–0.8 1.3, 0.8–1.7 0.3, 0.1–0.6* 1.3, 0.8–1.8 0.6, 0.3–0.8
Other substance 2.7, 2.3–3.2 3.5, 2.8–4.2 1.9, 1.3–2.4* 3.4, 2.7–4.1 1.3, 0.8–1.8* 4.3, 3.4–5.2 1.8, 1.3–2.2*

Number of SUDs
  1 13.5, 12.6–14.4 17.5, 16.1–19.0 9.3, 8.1–10 * 10.8, 9.6–12.0 17.6, 15.9–19.3* 15.1, 13.5–16.7 12.5, 11.4–13.6
  2+ 11.7, 10.8–12.5 16.2, 14.8–17.6 6.9, 5.9–7.9 * 14.7, 13.4–16.1 5.9, 4.8–6.9* 12.3, 10.9–13.8 11.3, 10.2–12.4

CI: confidence interval; SUD: substance use disorder.

1

Mean age (years) at first psychiatric visit.

2

Sedative diagnoses included tranquilizer diagnoses.

*

P<0.05 between two groups by sex, race, or treatment setting status.