Prevalence of current tobacco product use, by year — Youth Risk Behavior Survey, United States, 1991–2019*
* Logistic regression analyses were used to model linear and quadratic time effects while controlling for sex, grade, and race/ethnicity. Electronic vapor products: significant linear increase (2015–2019); cigarettes: significant linear decrease (1991–2019); significant quadratic trend: increase during 1991–1997, decrease during 1997–2019; cigars/cigarillos/little cigars: significant linear decrease (1997–2019); significant quadratic trend: decrease 1997–2013; decrease 2013–2019 (different rate of decrease). Differences from 2017 to 2019 were assessed by t-test (p<0.05): A significant increase occurred in use of electronic vapor products and any tobacco product; a significant decrease occurred in use of cigarettes, cigars/cigarillos/little cigars and smokeless tobacco; and no change occurred in use of ≥2 products.