E-Cigarette Use Does Not Up Quitting, Reduce Smoking

Baseline e-cigarette use does not significantly predict quitting smoking one year later

TUESDAY, March 25, 2014 (HealthDay News) -- Use of electronic-cigarettes (e-cigarettes) does not increase the rate of smoking cessation or reduce cigarette consumption after one year, according to a study published online March 24 in JAMA Internal Medicine.

Rachel A Grana, Ph.D., M.P.H., from the University of California in San Francisco, and colleagues conducted a longitudinal analysis using a national sample of current U.S. smokers. The authors sought to examine the impact of e-cigarette use on smoking habits. Data were analyzed from 949 current smokers who competed a baseline survey in November 2011 and a follow-up survey in November 2012.

The researchers observed no significant association between baseline e-cigarette use and greater intention to quit smoking (P = 0.09). Baseline e-cigarette use was not a significant predictor for quitting one year later (odds ratio, 0.71; P = 0.35). Quit status was significantly predicted by intention to quit (odds ratio, 5.59; P < 0.001) and cigarettes smoked per day (odds ratio, 0.97; P = 0.02), but not by past 30-day e-cigarette use (odds ratio, 0.76; P = 0.46). After controlling for baseline cigarette consumption, baseline e-cigarette use was not associated with a change in cigarette consumption among participants who reported smoking at both baseline and follow-up (P = 0.25).

"Regulations should prohibit advertising claiming or suggesting that e-cigarettes are effective smoking cessation devices until claims are supported by scientific evidence," the authors write.

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