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Int. J. Environ. Res. Public Health 2017, 14(2), 202; doi:10.3390/ijerph14020202

Electronic Cigarette Use and Smoking Abstinence in Japan: A Cross-Sectional Study of Quitting Methods

Center for Cancer Control and Information Services/Center for Public Health Sciences, National Cancer Center, Tokyo 104-0045, Japan
Center for Cancer Control and Statistics, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka 537-8511, Japan
National Cancer Center Hospital, National Cancer Center, Tokyo 104-0045, Japan
Department of Environmental Health, National Institute of Public Health, Saitama 351-0197, Japan
Author to whom correspondence should be addressed.
Received: 17 October 2016 / Accepted: 14 February 2017 / Published: 17 February 2017
(This article belongs to the Special Issue E-Cigarettes: Epidemiology, Policy and Public Health)
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The benefit of electronic cigarettes (e-cigarettes) in smoking cessation remains controversial. Recently, e-cigarettes have been gaining popularity in Japan, without evidence of efficacy on quitting cigarettes. We conducted an online survey to collect information on tobacco use, difficulties in smoking cessation, socio-demographic factors, and health-related factors in Japan. Among the total participants (n = 9055), 798 eligible persons aged 20–69 years who smoked within the previous five years were analyzed to assess the relationship between the outcome of smoking cessation and quitting methods used, including e-cigarettes, smoking cessation therapy, and unassisted. E-cigarette use was negatively associated with smoking cessation (odds ratio (OR) = 0.632; 95% confidence interval (CI) = 0.414–0.964) after adjusting for gender, age, health-related factors, and other quitting methods. Conversely, smoking cessation therapy (i.e., varenicline) was significantly associated with smoking cessation (OR = 1.885; 95% CI = 1.018–3.492) in the same model. For effective smoking cessation, e-cigarette use appears to have low efficacy among smokers in Japan. Allowing for the fact that this study is limited by its cross-sectional design, follow-up studies are needed to assess the prospective association between e-cigarette use and smoking cessation. View Full-Text
Keywords: electronic cigarettes; smoking cessation; smoking cessation therapy; quitting methods electronic cigarettes; smoking cessation; smoking cessation therapy; quitting methods
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hirano, T.; Tabuchi, T.; Nakahara, R.; Kunugita, N.; Mochizuki-Kobayashi, Y. Electronic Cigarette Use and Smoking Abstinence in Japan: A Cross-Sectional Study of Quitting Methods. Int. J. Environ. Res. Public Health 2017, 14, 202.

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