E-cigarette use is associated with other tobacco use among US adolescents.

Introduction:
This text presents the results of a study examining the relationship between e-cigarette use and the likelihood of tobacco use among US adolescents. The study utilizes data from the 2014 and 2015 National Youth Tobacco Survey (NYTS) to make conclusions about the potential public health significance of this relationship.

Key Points:

* The study found that e-cigarette use was associated with an increased likelihood of tobacco use among US adolescents.
* The association was present for both lifetime and current use of tobacco products.
* The study controlled for various socio-ecological factors that may influence tobacco use, such as age, gender, race/ethnicity, peer influence, and household tobacco use.
* The results suggest that promoting e-cigarettes for adults as a smoking cessation tool may increase the likelihood of adolescent tobacco use.
* The study had a large, nationally representative sample, which allows for generalization of the results.
* The study is cross-sectional, which limits the ability to make causal inferences.
* The study did not include information on the frequency or intensity of e-cigarette or tobacco use, which may be important factors to consider.

Main Message:
The study provides evidence for a relationship between e-cigarette use and tobacco use among US adolescents. The results suggest that e-cigarettes may serve as a gateway to tobacco use and that promoting e-cigarettes for adults as a smoking cessation tool may have unintended consequences for adolescents. Further research is needed to better understand the nature of this relationship and its potential public health implications.

auf R, Trepka MJ, Selim M, et al. E-cigarette use is associated with other tobacco use among US adolescents. International Journal of Public health. 2019;64(1):125-134. doi:10.1007/s00038-018-1166-7