Drug prevention program results found to be modest, slow.
D000293:Adolescent; D003362:Cost-Benefit Analysis; D006266:Health Education / Q000191:economics / Q000458:organization & administration*; D006801:Humans; D015397:Program Evaluation; D012572:School Health Services / Q000191:economics / Q000458:organization & administration*; D019966:Substance-Related Disorders / Q000453:epidemiology / Q000517:prevention & control*; D014481:United States / Q000453:epidemiology