Footnotes
With 95% confidence intervals indicated with error bars.
Based on a positive response to the question “Have you ever used an e-cigarette even one time?” and a response of “every day” or “some days” to the follow-up question “Do you now use e-cigarettes every day, some days, or not at all?” The denominator was adults aged ≥18 years.
Estimates are based on household interviews of a sample of the civilian, noninstitutionalized U.S. population and are derived from the National Health Interview Survey Sample Adult component.