Chapter 3's Figure 2 is a bar chart indicating the number of persons in the Study of High-risk Samples by age in 1992. The largest number (N = 1,165) was found in the 20 to 24 year-old group. After age 25, the number of individuals drops rapidly, going from 1,004 in the 25 to 29 year-old group to 1 case in the 85 to 89 year-old group.

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This page was last updated on June 16, 2008.

SAMHSA, an agency in the Department of Health and Human Services, is the Federal Government's lead agency for improving the quality and availability of substance abuse prevention, addiction treatment, and mental health services in the United States.