Table 3: Alcohol, Smoking, and Substance Involvement Screening Test (ASSIST) scores for the sub-sample .

%SE95% CI

Lifetime use
 Tobacco39.21.9335.4–43.0
 Alcohol59.02.1054.9–63.1
 Cannabis12.71.3010.2–15.3
 Methamphetamine6.90.915.1–8.7
Frequency of use in past 3 months
 Tobacco
  Never used61.11.9357.3–64.9
  Not in the past 3 months10.51.357.9–13.2
  Occasionally6.71.094.6–8.9
  Weekly/daily21.61.6918.3–24.9
 Tobacco risk
  Low risk70.11.8066.5–73.7
  Medium risk27.71.8024.1–31.2
  High risk2.30.601.1–3.5
 Alcohol
  Never used41.32.1037.1–45.4
  Not in the past 3 months21.91.7518.5–25.4
  Occasionally26.91.9723.1–30.8
  Weekly/daily9.91.357.2–12.5
 Alcohol risk††
  Low risk74.91.9071.2–78.7
  Medium risk21.91.8018.2–25.5
  High risk3.20.801.6–4.8
 Cannabis
  Never used87.31.3184.7–89.8
  Not in the past 3 months9.91.257.4–12.3
  Occasionally1.70.390.9–2.4
  Weekly/daily1.20.300.6–1.8
 Cannabis risk†††
  Low risk96.40.6095.3–97.5
  Medium risk3.20.502.1–4.2
  High risk0.40.200.0–0.9
 Methamphetamine
  Never used93.10.9191.3–94.9
  Not in the past 3 months4.50.852.8–6.1
  Occasionally1.10.220.7–1.6
  Weekly/daily1.30.340.6–2.0
 Methamphetamine risk†††
  Low risk97.20.4096.4–98.1
  Medium risk2.10.401.3–2.8
  High risk0.70.200.3–1.1
 Any drug use 
 (occasionally or weekly/daily)
4.70.603.5–5.9

Tobacco risk 0–3 = low risk; 4–26 = medium risk; 27+ = high risk; ††Alcohol risk 0–10 = low risk; 11–26 = medium risk; 27+ = high risk; †††Drug risk 0–3 = low risk; 4–26 = medium risk; 27+ = high risk.