@Article{信息:doi 10.2196 / / jmir。8550，作者=“Hsu, Greta and Sun, Jessica Y and祝淑红”，标题=“2013-2014 - 2016-2017电子烟品牌演变:品牌网站分析”，期刊=“J Med Internet Res”，年=“2018”，月=“3”，日=“12”，卷=“20”，数=“3”，页=“e80”，关键词=“电子烟;vap;尼古丁;纵向研究;互联网;背景:近年来，电子烟(电子烟)行业的规模和组织复杂性都有所增长，最显著的是2012年大型烟草公司的进入和电子烟商店的激增。许多品牌都有零售网站，提供电子烟营销宣传，并直接向消费者销售。对于不同类型的电子烟品牌网站的演变组成的理解目前还不发达。目的:本文介绍了2013-2014年调查的电子烟品牌网站到2016-2017年的演变情况，以及目前不同类型的电子烟生产商运营的网站有何不同。 Methods: In 2016-2017, we revisited 466 e-cigarette brand websites surveyed in 2013-2014, 288 of which were extant, and identified 145 new English-language websites. We compared product designs, marketing claims, and age-based warnings presented by types of e-cigarette producers: major tobacco companies, independent vape shops, and independent internet-only companies. Results: Among the 433 websites examined in 2016-2017, 12 were owned by major tobacco companies, 162 operated a physical vape shop, and 259 were internet-only operations. Closed-system product designs were sold by 83{\%} (10/12) of tobacco-owned brands. In comparison, 29.0{\%} (47/162, P<.001) of vape shop and 55.2{\%} (143/259, P=.06) of internet-only brands sold closed-system designs. Compared with vape shop and internet-only brands, tobacco-owned brands offered a smaller set of product models (P values <.001) and a narrower range of flavors (P values <.01), with greater emphasis on the traditional combustible cigarette flavors of tobacco and menthol (P values <.001). Tobacco-owned brands also offered a narrower range of nicotine options than the vape shops (P=.002) and were less likely to offer nicotine-free e-liquid compared with internet-only and vape shop brands (P values <.001). Finally, 83{\%} (10/12) of tobacco-owned brand websites featured age verification pop-up windows. In comparison, only 50.2{\%} (130/259) of internet-only brands (P=.01) and 60.5{\%} (98/162) of vape shop brands (P=.06) featured age verification windows. Websites surveyed in both 2013-2014 and 2016-2017 became more likely to sell open-system mods (P<.001) and sold an increased number of product models (P<.001), flavors (P<.001), and nicotine options (P<.001). Prevalence of several types of claims decreased significantly, including indirect claims regarding smoking cessation (P<.001), claims regarding e-cigarettes as healthier (P<.001), less expensive (P<.001), and usable in more places (P<.001) compared with combustible cigarettes. Conclusions: The number of e-cigarette brands has not appeared to increase since 2014, even as website messaging evolved, with brands owned by tobacco companies and vape shops pulling in opposite directions. Brands owned by tobacco companies offered a limited range of e-cigarette products, whereas brands owned by vape shops emphasized a panoply of flavor and nicotine options. Furthermore, the Food and Drug Administration's regulatory action may influence the types of e-cigarette products offered and the market shares of various companies. ", issn="1438-8871", doi="10.2196/jmir.8550", url="//www.mybigtv.com/2018/3/e80/", url="https://doi.org/10.2196/jmir.8550", url="http://www.ncbi.nlm.nih.gov/pubmed/29530840" }