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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.

Correspondence: Requests for reprints should be sent to Phyllis L. Ellickson, PhD, RAND, 1700 Main St, PO Box 2138, Santa Monica, CA 90407-2138 (e-mail: phyllis_ellickson{at}rand.org).

Objectives. We evaluated the revised Project ALERT drug prevention program across a wide variety of Midwestern schools and communities.

Methods. Fifty-five South Dakota middle schools were randomly assigned to program or control conditions. Treatment group students received 11 lessons in 7th grade and 3 more in 8th grade. Program effects for 4276 8th-graders were assessed 18 months after baseline.

Results. The revised Project ALERT curriculum curbed cigarette and marijuana use initiation, current and regular cigarette use, and alcohol misuse. Reductions ranged from 19% to 39%. Program effects were not significant for initial and current drinking or for current and regular marijuana use.

Conclusions. School-based drug prevention programs can prevent occasional and more serious drug use, help low- to high-risk adolescents, and be effective in diverse school environments.

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