Perceived benefits of e-cigarettes may lead to higher experimentation rates

Despite years of anti-smoking education and legislation, tobacco use still remains an important public health issue in the United States. In 2010, 25.2% of all adults and 35.6% of young adults reported current tobacco use. While anti-tobacco efforts continue across the county, the introduction of electronic cigarettes (e-cigarettes) has been marketed as a less harmful alternative to cigarettes and also as a smoking cessation aid.

E-cigarettes supply nicotine through inhaled water vapor. While the addictiveness and long-term effects of using e-cigarettes as a nicotine delivery system are unknown, many people anecdotally believe that they are safer than traditional tobacco products. According to a new study published in the February issue of the American Journal of Preventive Medicine, the belief that e-cigarettes pose less of a health risk may lead to increased experimentation with e-cigarettes among young adults.

Investigators from the Division of Epidemiology and Community Health, University of Minnesota looked at whether or not there was a relationship between perceived notions about the harmfulness of e-cigarettes relative to cigarettes and subsequent e-cigarette use among young adults. Investigators surveyed 1379 participants from the Minnesota Adolescent Community Cohort who had never used e-cigarettes. The initial baseline survey explored their opinions about e-cigarettes and their effect on health relative to cigarettes or their usefulness as an aid to stop smoking. Then, a follow-up survey conducted one year later asked participants if they had experimented with e-cigarettes.

"Participants who agreed e-cigarettes can help people quit smoking and those who agreed that e-cigarettes are less harmful than cigarettes were more likely than those who did not agree to subsequently report experimenting with e-cigarettes. These associations did not vary by gender or smoking status," says study lead author Kelvin Choi, PhD.

Specifically, the follow-up study found that 7.4% of participants who had never used an e-cigarette at baseline reported subsequently using an e-cigarette, with 21.6% among baseline current smokers, 11.9% among baseline former smokers, and 2.9% among baseline nonsmokers reporting use.

"The study showed that 2.9% of baseline nonsmokers in this U.S. regional sample of young adults reported ever using e-cigarettes at follow-up, suggesting an interest in e-cigarettes among nonsmoking young adults," explains Dr. Choi. "This is problematic because young adults are still developing their tobacco use behaviors, and e-cigarettes may introduce young adults to tobacco use, or promote dual use of cigarettes and smokeless tobacco products."

While the risks associated with long-term e-cigarette use are largely unknown, recent studies suggest that they can significantly increase plasma nicotine levels, which means they are potentially as addictive as cigarettes. "This study also suggested that about 12% of former young adults smokers at baseline were re-introduced to nicotine through e-cigarettes. Future prospective studies including adults of all ages are needed to confirm these finding related to e-cigarette use among nonsmokers and former smokers, and to determine the role of e-cigarettes on relapse of smoking," adds Dr. Choi.