• Su Hyun Park, Dustin T Duncan, ShahawyOmar ElOEDepartment of Population Health, New York University School of Medicine, New York, New York; NYU/Abu Dhabi Public Health Research Center, Abu Dhabi, United Arab Emirates., Lily Lee, Jenni A Shearston, Kosuke Tamura, Scott E Sherman, and Michael Weitzman.
• Department of Pediatrics, New York University School of Medicine, New York, New York; Department of Population Health, New York University School of Medicine, New York, New York. Electronic address: suhyun.park@nyumc.org.
• Am J Prev Med. 2017 Nov 1; 53 (5): 652660652-660.

IntroductionBecause of the rapidly increasing use of electronic cigarettes (e-cigarettes), this study aimed to investigate the individual characteristics and state-level prevalence of U.S. adults who have switched to e-cigarettes from traditional cigarettes.MethodsData from the 2012-2013 and 2013-2014 National Adult Tobacco Surveys were analyzed in 2016. Relative percent change in switching was estimated, and the state-specific prevalence of adults who switched to e-cigarettes from traditional cigarettes was calculated and mapped. Multivariate logistic regression was conducted to examine how switching varied by sociodemographic subgroups and region.ResultsOverall, the number of individuals who switched from traditional cigarettes to e-cigarettes increased by approximately 100% over the 1-year interval. Significant increases were found among a number of sociodemographics and regions. Multivariate logistic regression analyses showed that young adults and those living in the South and West were more likely to switch to e-cigarettes, compared to former smokers who did not switch. Compared with current dual users, those with higher education and those who were not single were more likely to switch to e-cigarettes. The state with the highest prevalence of switching was New Mexico (7.3%), whereas Connecticut had the lowest prevalence (0.8 %) among former smokers.ConclusionsThere is an increase in the progression from traditional cigarette use to e-cigarette use. Further research is warranted to determine whether this change continues and facilitates cigarette smoking cessation as a possible public health benefit and opportunity to save lives rather than constitutes a potential threat to public health.Copyright © 2017 American Journal of Preventive Medicine. Published by Elsevier Inc. All rights reserved.

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