1999-2017. Centers for Disease Control and Prevention (CDC). State Tobacco Activities Tracking and Evaluation (STATE) System. YTS Data. The YTS was developed to provide states with comprehensive data on both middle school and high school students regarding tobacco use, exposure to environmental tobacco smoke, smoking cessation, school curriculum, minors' ability to purchase or otherwise obtain tobacco products, knowledge and attitudes about tobacco, and familiarity with pro-tobacco and anti-tobacco media messages. The YTS uses a two-stage cluster sample design to produce representative samples of students in middle schools (grades 6–8) and high schools (grades 9–12). The data for the STATE System were extracted from Youth Tobacco Surveys from participating states. Tobacco topics included are cigarette smoking prevalence, cigarette smoking frequency, smokeless tobacco products prevalence and quit attempts.

1993, 1995, 1997, 1999, 2001, 2003, 2005, 2007, 2009, 2011, 2013, 2015, 2017. Centers for Disease Control and Prevention (CDC). State Tobacco Activities Tracking and Evaluation (STATE) System. YRBSS Data. The YRBS is conducted biennially and collects data on a variety of youth risk behaviors including tobacco use. The YRBS uses a two-stage cluster sample design to produce representative samples of students in high schools (grades 9-12). The YRBS uses SUDAAN 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 include cigarette and e-cigarette use prevalence, cigarette and e-cigarette use frequency, and smokeless tobacco products.