* With 95% confidence intervals indicated with error bars. † Based on the response of “yes” to the survey question “Have you ever used an e-cigarette, even one time?” §… Click to show full abstract
* With 95% confidence intervals indicated with error bars. † Based on the response of “yes” to the survey question “Have you ever used an e-cigarette, even one time?” § Based on a response of “every day” or “some days” to the question “Do you now use e-cigarettes every day, some days or not at all?” ¶ 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.
               
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