• Prevention of suicidal ideation and suicide attempts

  • Significantly reduced risk of illicit drug abuse or dependence disorder at ages 19-21

Life Skills Training, a school-based substance use prevention program:

  • Significantly reduced drug and polydrug (tobacco, alcohol, and marijuana) use three years after the program

  • Strongest effects when delivered with fidelity—44 percent fewer drug users; 66 percent fewer polydrug users

  • Significantly reduced methamphetamine use up to 4.5 years later when combined with the Strengthening Families Program

Linking Interests of Families and Teachers, a combined family–school intervention focused on skills and communication:

  • Reduced levels of aggressive behavior, less involvement with deviant peers and lower arrest rates, less use of alcohol and marijuana

  • For fifth graders, continued preventive effects three years later

Fast Track, a multicomponent intervention in grades K-10:

  • Reduced self-reported antisocial behavior and significantly reduced incidence of conduct disorder for children at highest initial risk

  • Significantly reduced incidence of a diagnosis of attention deficit hyperactivity disorder for children at highest initial risk

Seattle Social Development Project, a combined elementary grade parent–teacher training intervention:

  • Reduced diagnosable mental health disorders by age 24 and heavy alcohol use and violence by age 18

  • Effects particularly strong for African Americans

Adolescent Transitions Program, a parenting intervention delivered in schools:

  • Reduced rates of growth in tobacco, alcohol, and marijuana use between ages 11 and 17 and lowered likelihood of being diagnosed with a substance use disorder

  • Reduced rates of arrest

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