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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)
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 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)
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)
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)
The Internet offers a promising channel to conduct smoking cessation research. Among the advantages of Internet research are the ability to access large numbers of participants who might not otherwise participate in a cessation trial, and the ability to conduct research efficiently and cost-effectively. To leverage the opportunity of the Internet in(More)
Unhealthy behaviors increase individual health risks and are a socioeconomic burden. Harnessing social influence is perceived as fundamental for interventions to influence health-related behaviors. However, the mechanisms through which social influence occurs are poorly understood. Online social networks provide the opportunity to understand these(More)
BACKGROUND The Internet is a viable channel to deliver evidence-based smoking cessation treatment that has the potential to make a large population impact on reducing smoking prevalence. There is high demand for smoking cessation information and support on the Internet. Approximately 7% (10.2 million) of adult American Internet users have searched for(More)