The usage of e-cigarettes among smokers had increased dramatically by 2014, with estimates from various studies ranging from 15% to 30%.
Smokers who use e-cigarettes are more likely to quit using conventional cigarettes.
Ever users referred to those who had ever tried e-cigarettes, while current users were those who answered "every day" or "some days".
E-cigarette users were identified from the most recent survey, while smoking quit rates were obtained from those who had reported smoking cigarettes 12 months before the survey.
Smokers who use e-cigarettes are more likely to quit smoking as compared to those who use traditional cigarettes, a recent study had revealed. USA health officials have continued to promote abstinence to the public rather than encourage smokers to switch to less harmful products: online fact sheets published by CDC, FDA, and the National Cancer Institute list multiple health risks associated with smokeless tobacco, but give no indication it is less harmful than cigarettes.
Sally Haw, professor of public and population health, said: "The greater impact of e-cigarette use on young people thought to be at lower risk of starting smoking is of particular concern". Moreover, they do not contain the harmful, cancer-causing chemicals found in traditional cigarettes.
Overall, the number of people who quit smoking increased by 1.1 percentage points in 2015 from 2011. Nor did the researchers explain details about the type of e-cigs being used, or if other smoking cessations tools like pharmacotherapy were used at the same time.
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"This is the first statistically significant increase observed in population smoking cessation among United States adults in almost a quarter of a century".
Lead study author Professor Shu-Hong Zhu said the research was based on the largest representative sample of e-cigarette users to date, and provided "a strong case" that e-cigarette use was associated with an increase in smoking cessation at the population level.
AACS CEO Jeff Rogut has argued that while the ban remains in place, e-cigarette users must source their nicotine online without quality assurance.
Current approaches for smoking cessation do not work for a vast majority of smokers; this calls for the need of alternative approaches, like e-cigs.
"Other interventions that occurred concurrently, such as a national campaign showing evocative ads that highlight the serious health consequences of tobacco use and state tobacco control efforts, no doubt played a role", Zhu said in the release. The report said another limitation was that this study was not a randomized trial at the population level.
The survey was the fifth US Current Population Survey-Tobacco Use Supplement (CPS-TUS).