Reasons for E-cigarette Use, Vaping Patterns, and Cessation Behaviors among U.S. Adolescents.

E-cigarettes have surpassed cigarettes and become the most commonly used tobacco product by U.S. youths. Adolescents choose to vape for different reasons. This study examined reasons for youth e-cigarette use and their associations with vaping patterns and cessation behaviors. The product characteristics factor (e.g., flavors, concealability, and vape tricks) was associated with more frequent e-cig use and lower odds of cessation behaviors, suggesting a need for flavor bans and product design regulation.