title: QuickStats: Cigarette Smoking Status* Among Current Adult E-cigarette Users,†by Age Group - National Health Interview Survey,§United States, 2015.
abstract: In 2015, 3.5% of U.S. adults were current e-cigarette users. Among adult e-cigarette users overall, 58.8% also were current cigarette smokers, 29.8% were former cigarette smokers, and 11.4% had never been cigarette smokers. Among current e-cigarette users aged ≥45 years, 98.7% were either current or former cigarette smokers, and 1.3% had never been cigarette smokers. In contrast, among current e-cigarette users aged 18-24 years, 40.0% had never been cigarette smokers.