In the United States, 71% of all deaths among persons aged 10-24 years result from 4 causes: motor vehicle crashes, other unintentional injuries, homicide, and suicide. Results from the 2005 national Youth Risk Behavior Survey (YRBS) indicated that during the 30 days preceding the survey, many high school students engaged in behaviors that…

In the United States, 70.8% of all deaths among youth and young adults aged 10-24 years result from only four causes: motor-vehicle crashes (32.3%), other unintentional injuries (11.7%), homicide (15.1%), and suicide (11.7%). Substantial morbidity and social problems also result from the approximately 870,000 pregnancies that occur each year among…