Health-risk behaviors among youth may result in immediate health problems (e.g., injuries and sexually transmitted diseases) or extend into adulthood and increase risk for chronic diseases (e.g., heart disease and cancer). This report uses national data from the Youth Risk Behavior Survey (YRBS), conducted as part of the 1992 National Health Interview Survey (NHIS), to examine the prevalence of selected self-reported health-risk behaviors among persons aged 12-21 years.