Bitte wählen Sie ihr Lieferland und ihre Kundengruppe
In the United States, 72% of all deaths among youth and young adults aged 10-24 years result from four causes: motor vehicle crashes (26%), other unintentional injuries (17%), homicide (16%), and suicide (13%). Substantial morbidity and social problems also result from the estimated 410,000 births; 517,174 cases of chlamydia, gonorrhea, and syphilis; and 2,036 cases of human immunodeficiency virus (HIV) reported in 2009 among youth aged 15-19 years. Among adults aged <25 years, 57% of all deaths in the United States result from cardiovascular disease (34%) and cancer (23%). These leading causes of morbidity and mortality among youth and adults in the United States are related to six categories of priority health-risk behaviors: (1) behaviors that contribute to unintentional injuries and violence; (2) tobacco use; (3) alcohol and other drug use; (4) sexual behaviors that contribute to unintended pregnancy and sexually transmitted diseases (STDs), including HIV infection; (5) unhealthy dietary behaviors; and (6) physical inactivity. These behaviors frequently are interrelated and are established during childhood and adolescence and extend into adulthood. To monitor priority health-risk behaviors in each of these six categories and obesity and asthma among youth and young adults, CDC developed the Youth Risk Behavior Surveillance System (YRBSS). YRBSS includes school-based national, state, and large urban school district Youth Risk Behavior Surveys (YRBS) conducted among representative samples of students in grades 9-12. National, state, and large urban school district surveys have been conducted biennially since 1991.