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E-cigarettes With Higher Nicotine Linked With More Smoking

by Bidita Debnath on October 24, 2017 at 11:55 PM
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E-cigarettes With Higher Nicotine Linked With More Smoking

Nicotine is the main component of conventional combustible cigarettes that maintains smoking dependence. E-cigarettes or electronic cigarettes are available in a wide variety of nicotine concentrations.

E-cigarette solutions containing nicotine were recently deemed to be tobacco products and to fall under the regulatory jurisdiction of the U.S Food and Drug Administration. The use of electronic cigarettes with higher nicotine concentrations by high school students in California was associated with a greater likelihood of subsequent use of conventional combustible cigarettes and e-cigarettes, according to a new article published by JAMA Pediatrics.

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Adam M. Leventhal, Ph.D., of the University of Southern California Keck School of Medicine, Los Angeles, and coauthors examined associations between baseline e-cigarette nicotine concentration levels vaped (from none to 18 mg/mL or more) and the subsequent frequency and intensity of combustible cigarette smoking and e-cigarette vaping after six months in a group of adolescent e-cigarette users.

The study had an analytic sample of 181 students from high schools in the Los Angeles area who were surveyed during the 10th grade (baseline) and then in the 11th grade for a six-month follow-up. The adolescents reported using e-cigarettes within the past 30 days and the nicotine concentration levels they used at baseline.
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Vaping e-cigarettes at higher nicotine concentrations at baseline was associated with a greater likelihood of using e-cigarettes and smoking combustible cigarettes in the past 30 days at the six-month follow-up and a greater likelihood of more intense use, according to the results.

Limitations of the study include its small sample size and a reliance on self-reported data. The authors acknowledge that shared unmeasured risk factors also could explain the association between the use of e-cigarettes with higher nicotine concentrations and accelerated vaping and smoking, although they attempted to analytically adjust for that possibility.

"Given the U.S. Food and Drug Administration's 2016 Deeming Rule, the results of this study provide preliminary evidence that regulatory policies addressing nicotine concentration levels in e-cigarette products used by adolescents may affect progression of combustible cigarette and e-cigarette use among youths," the article concludes.

Source: Eurekalert
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