Nathan K. Cobb

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OBJECTIVES We evaluated the social network structure of QuitNet, one of the largest online communities for behavior change, and compared its characteristics to other known social networks. METHODS Using modern network analysis methods, we identified QuitNet members who were active during a 60-day period, along with their ties. We then derived multiple(More)
BACKGROUND Well-being encompasses physical, psychological, and social aspects of health and predicts healthcare utilization and expenditures. Despite their potential clinical impact, interventions that leverage social network effects to target well-being are uncommon. PURPOSE Using a pragmatic design, to evaluate the effectiveness of an online well-being(More)
BACKGROUND Smoking remains one of the most pressing public health problems in the United States and internationally. The concurrent evolution of the Internet, social network science, and online communities offers a potential target for high-yield interventions capable of shifting population-level smoking rates and substantially improving public health. (More)
The extraordinary growth in Internet use offers researchers important new opportunities to identify and test new ways to deliver effective behavior change programs. The information architecture (IA)-the structure of website information--is an important but often overlooked factor to consider when adapting behavioral strategies developed in office-based(More)
n engl j med 365;3 nejm.org july 21, 2011 193 as drug-delivery devices. Previously, products delivering refined nicotine had either been regulated as pharmaceuticals (and subjected to the “safe and effective” standard used in drug approvals) or swiftly removed from the market to protect public safety. The FDA’s decision came after the courts blocked the(More)
BACKGROUND Social media platforms such as Twitter are rapidly becoming key resources for public health surveillance applications, yet little is known about Twitter users' levels of informedness and sentiment toward tobacco, especially with regard to the emerging tobacco control challenges posed by hookah and electronic cigarettes. OBJECTIVE To develop a(More)
n engl j med 371;16 nejm.org october 16, 2014 1469 the devices, deeming them to be subject to regulation as tobacco products.1 The term “e-cigarette” (which the regulations do not define) generally refers to a variety of battery-powered inhaler devices that deliver aerosolized, refined nicotine in a humectant. In 2014, Americans will spend about $2.2(More)
To significantly reduce smoking prevalence, treatments must balance reach, efficacy, and cost. The Internet can reach millions of smokers cost-effectively. Many cessation Web sites exist, but few have been evaluated. As a result, the potential impact of the Internet on smoking prevalence remains unknown. The present study reports the results, challenges,(More)
BACKGROUND Web-based smoking cessation interventions can have a public health impact because they are both effective in promoting cessation and can reach large numbers of smokers in a cost-efficient manner. Their potential impact, however, has not been realized. It is still unclear how such interventions promote cessation, who benefits most, and how to(More)