Figure 1.

The prevalence of current e-cigarette/ENDS use among the total adult population, online and traditional survey estimates *, 2010–2017. * The estimates from online surveys are indicated by an X, and the estimates from traditional surveys are indicated by a circle. The legend adopts the format “author’s name, publication year (survey name and year(s)),” and the names of all online surveys are omitted. For surveys that collected data over a two-year period, we plotted the estimates in the mid-period (e.g., the estimate 2.6% from Jaber et al. using NHANES 2013–14 is plotted in 2013.5). ** Authors’ estimate one is measured by daily/non-daily ENDS use, and authors’ estimate two is measured by past-30-day ENDS use.