The Youth Risk Behavior Surveillance System (YRBSS) monitors six categories of priority health behaviors
among youth and young adults: 1) behaviors that contribute to unintentional injuries and violence; 2) tobacco use; 3) alcohol and
other drug use; 4) sexual behaviors related to unintended pregnancy and sexually transmitted infections (STIs), including human
immunodeficiency virus (HIV) infection; 5) unhealthy dietary behaviors; and 6) physical inactivity. In addition, YRBSS monitors
the prevalence of obesity and asthma and other priority health behaviors.
The YRBSS uses SAS-callable SUDAAN (Research Triangle Institute, Research Triangle Park, NC) to calculate asymmetric confidence intervals based on the logit transformation. The logit transformation constrains confidence interval limits to vary between a lower limit of 0% and an upper limit of 100%. The data for the STATE System were extracted from YRBSS surveys from participating states. Tobacco topics included are cigarette smoking prevalence, cigarette smoking frequency, and smokeless tobacco products prevalence.