The British study found that use of e-cigarettes "has been positively associated with the success rates of quit attempts after adjustment for a range of confounding variables." They did not detect an increase in quit attempts, but among those who try, vapers seem to quit more frequently.
They estimate that use of vapor products accounted for about 18,000 additional long-term ex-smokers among the British populace. They also noted that regular use by people who have never smoked remains rare, less than one percent.
The California researchers looked at smokers over a two-year period. Some of them vaped during all of the two years, some for part of the time, and some not at all. They found that the long-term vaping usersÂ had a higher quit attempt rate than the other groups, and a much higher cessation rate.
More than 42 percent of the long-term e-cigarette users were able to quit smoking for three months or more, versus fewer than 16 percent of the other groups. The researchers concluded, Among those making a quit attempt, use of e-cigarettes as a cessation aid surpassed that of FDA-approved pharmacotherapy.