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Epidemiological surveys have provided key information about the prevalence and degree of seriousness at different ages of a wide array of problem behaviors such as delinquency, substance use, early sexual involvement, and mental health disorders. Knowledge of the extent of these problems and changes in their course over time is important. In its absence, interventions and health planning in general can be difficult. Understanding which risk and protective factors are relevant to which problem behaviors is also essential for the formulation of theories that constitute the basis of intervention.
This book draws on the results of the major Pittsburgh Youth Study complemented by follow-up tracking of juvenile court records for more than six years, to address the following questions:
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