Jenssen Brian P, Klein Jonathan D, Salazar Laura F, Daluga Nichole A, DiClemente Ralph J
Julius B. Richmond Center of Excellence, American Academy of Pediatrics, Elk Grove Village, Illinois, USA.
Pediatrics. 2009 Aug;124(2):e180-6. doi: 10.1542/peds.2008-3838. Epub 2009 Jul 20.
We performed a content analysis of all Web pages viewed by a random sample of adolescents to describe exposure to tobacco- and smoking-related text and images.
Adolescents (14-17 years of age) with home Internet access were recruited. Internet-tracking software was installed on home computers used by 346 eligible consenting participants. All Web pages viewed by adolescent participants were captured during a 30-day period for each subject. Keywords on smoking and tobacco were used to identify tobacco images or text.
The 346 participants viewed 1.2 million Web pages, of which 8702 (0.72%) contained tobacco or smoking content. Exposure to tobacco content did not vary according to smoking status. Content was protobacco on 1916 pages, antitobacco on 1572, and complex or unclear on 5055. Social networking sites, mainly MySpace, represented 53% of pages (n = 4612) on which tobacco content was found. All pages with smoking content contained references in text, and 256 (3%) contained images. Many (43%) of the adolescents were exposed to protobacco imagery (median: 3 pages per month). Cigarettes were mentioned on 20% of pages. Tobacco products were sold on 50 pages, and 242 pages contained links to tobacco products sold on other pages. On social networking sites, 4121 pages included a mention of smoking status in the authors' individual profiles, with 23% of authors identifying themselves as smokers.
Many adolescents are consistently exposed to tobacco content on the Internet, but the volume of exposure is limited and not all content represents protobacco content.
我们对青少年随机样本浏览的所有网页进行了内容分析，以描述其接触烟草及吸烟相关文本和图像的情况。
招募了家中可上网的青少年（14 - 17岁）。在346名符合条件且同意参与的参与者使用的家用电脑上安装了网络跟踪软件。在30天内，记录每位青少年参与者浏览的所有网页。使用与吸烟和烟草相关的关键词来识别烟草图像或文本。
346名参与者浏览了120万个网页，其中8702个（0.72%）包含烟草或吸烟内容。接触烟草内容的情况与吸烟状况无关。1916个网页的内容是支持烟草的，1572个是反对烟草的，5055个是复杂或不明确的。社交网站，主要是MySpace，占发现有烟草内容网页的53%（n = 4612）。所有有吸烟内容的网页都有文字提及，256个（3%）包含图像。许多（43%）青少年接触到支持烟草的图像（中位数：每月3个网页）。20%的网页提到了香烟。50个网页售卖烟草产品，242个网页包含指向其他网页售卖烟草产品的链接。在社交网站上，4121个网页在作者个人资料中提到了吸烟状况，23%的作者表明自己是吸烟者。
许多青少年持续接触互联网上的烟草内容，但接触量有限，且并非所有内容都代表支持烟草的内容。
