title: The Youth Risk Behavior Surveillance System: measuring health-risk behaviors.
abstract: OBJECTIVE
  To measure priority health-riskbehaviors among youth.
  
  
  METHODS
  The Youth Risk Behavior Surveillance System (YRBSS) monitors priority health-risk behaviors among youth.
  
  
  RESULTS
  In 1999, many high school students practiced behaviors that contribute to leading health problems--16.4% rarely or never wore safety belts and, during the past 30 days, 17.3% carried a weapon, 34.8% smoked cigarettes, and 26.7% used marijuana. Also, 49.9% had had sexual intercourse. One quarter (26.0%) were at risk for becoming overweight or were overweight.
  
  
  CONCLUSIONS
  YRBSS data are used to improve policies and programs to reduce priority health-risk behaviors among youth.
authors.affiliation: Surveillance and Evaluation Research Branch, Division of Adolescent and School Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA. LKK1@CDC.GOV
authors.forename: L
authors.initials: L
authors.lastname: Kann
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D003625:Data Collection; D004032:Diet; D015444:Exercise; D015438:Health Behavior; D006801:Humans; D008389:Marketing of Health Services; D011159:Population Surveillance; D012309:Risk-Taking; D012449:Safety; D012574:Schools; D012622:Seat Belts / Q000706:statistics & numerical data; D012725:Sexual Behavior / Q000706:statistics & numerical data; D012907:Smoking / Q000453:epidemiology; D019966:Substance-Related Disorders / Q000453:epidemiology; D014481:United States / Q000453:epidemiology; D014754:Violence / Q000706:statistics & numerical data