Use of electronic cigarettes is increasing rapidly in the United States, although the negative health outcomes associated with these products are still unknown . Ever users and current users were on average younger than those who did not use e-cigarettes (57.5 vs. 61.2 years; p20 times more likely (odds ratio, 20.75; 95% confidence interval, 12.84–33.55) than never-smokers . The authors used data from the Detroit Research on Cancer Survivors cohort study, comprised of AA adult cancer survivors .