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New Inroads in Preventing Adolescent Drug Use: Results From a Large-Scale Trial of Project ALERT in Middle Schools
Phyllis L. Ellickson, PhD,
Daniel F. McCaffrey, PhD,
Bonnie Ghosh-Dastidar, PhD and
Douglas L. Longshore, PhD
All of the authors are with RAND, Santa Monica, Calif.

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FIGURE 1— Project ALERTs impact on cigarette, marijuana, and alcohol use (combined sample) 18 months after baseline.
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Copyright © 2003 by the American Public Health Association
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