Tobacco Use Status

E-cigarette use status was defined as never (students who reported having never tried an e-cigarette), former (students who reported having ever tried an e-cigarette but having not used it in the last 30 days), and current (students who reported having used an e-cigarette ≥ 1 day in the past 30 days) (Dai and Hao, 2016). Similarly, I defined the status of cigarette smoking and other tobacco use as never, former and current. Other tobacco products include cigars (cigars, little cigars, and cigarillos), smokeless tobacco (chewing tobacco, snuff, dip, snus, and dissolvable tobacco), hookahs, pipe tobacco, or bidis and those who reported currently using any of these products were defined as current other tobacco users.