@文章{信息:doi/10.2196/17104，作者="Massey, Zachary B和Li, Yachao和Holli, Jessica和Churchill, Victoria和Yang, Bo和Henderson, Katherine和Ashley, David L和Huang, Jidong和Popova, Lucy"，标题="电子尼古丁输送系统的修改:YouTube视频的内容分析"，期刊="J医学互联网Res"，年="2020"，月="Jun"，日="2"，卷="22"，数="6"，页="e17104"，关键词="ENDS修改;YouTube;线圈;e-liquid;背景:由于用户修改可以改变电子尼古丁输送系统(ENDS)的成瘾性和毒性，需要更多的研究来了解导致这些产品更改的类型、动机、风险和信息来源。YouTube已被确定为ENDS用户获取和分享有关ENDS产品和修改信息的主要平台。然而，目前还缺乏对YouTube上ENDS修改视频的全面研究。目的:本研究旨在分析YouTube上描述ENDS修饰的视频内容。方法:在2019年3月搜索YouTube，以确定描述ENDS修改的视频。搜索词来源于对ENDS用户的采访和当前文献。 We used 28 search phrases that combined the words vape and vaping with modification-related key terms (eg, custom build, modification, and dripping). The final sample included 168 videos. Results: Videos were 1 to 108 min long (median 9.55). Presenters were largely male (117/168, 69.6{\%}), white (94/168, 56.0{\%}), and older than 25 years (94/168, 56.0{\%}). Most videos gave how to instructions (148/168, 88.1{\%}), but few offered warnings (30/168, 17.9{\%}) or mentioned commercial alternatives to modifications they presented (16/168, 9.5{\%}). The ENDS devices most often featured were drippers (63/168, 37.5{\%}) and refillable tanks (37/168, 22.0{\%}). The most often modified ENDS components were coils (82/168, 48.8{\%}) and e-liquids (34/168, 20.2{\%}), which included adding other substances, such as cannabis, to the e-liquids (6/168, 3.6{\%}). Most videos portrayed ENDS modifications positively (106/168, 63.1{\%} positive; 60/168, 35.7{\%} neutral; and 2/168, 1.2{\%} negative) and were either neutral or positive in their overall portrayal of ENDS devices (78/168, 46.4{\%} positive; 89/168, 53.0{\%} neutral; and 1/168, 0.6{\%} negative). Conclusions: This study identified several concerning trends in popular YouTube videos on ENDS modifications, including lack of warnings, the addition of marijuana derivatives to e-liquids, and the positive portrayal of ENDS devices and modifications. By identifying the types of modifications (coil and e-liquid being the most prevalent), this study sets an agenda for research on the effects of modifications. ", issn="1438-8871", doi="10.2196/17104", url="//www.mybigtv.com/2020/6/e17104", url="https://doi.org/10.2196/17104", url="http://www.ncbi.nlm.nih.gov/pubmed/32348288" }