Vaping Status
Respondents were asked which statement best described their experience with e-cigarettes: “I have never heard of e-cigarettes and never tried them,” “I have heard of e-cigarettes but have never tried them,” “I have tried e-cigarettes but do not use them (anymore),” “I have tried e-cigarettes but still use them,” and “Don’t know.” Ever vapers were subsequently asked how often they had used or currently used e-cigarettes, with response options ranging from “Less than once a month” to “Every day.” Responses were classified into 3 categories: “never vapers,” “ever vapers,” and “current vapers” (including occasional and regular vaping) (eTable 1 in 