Figures (1)  Tables (1)

    • Figure 1. 

      Participant recruitment flowchart.

    • Characteristics Total
      (n = 25)      		 Exclusive e-cigarette user
      (n = 10)      		 Dual cigarette/
      e-cigarette user (n = 15)
      Sex Male 12 (48.0) 5 (50.0) 7 (46.7)
      Female 13 (52.0) 5 (50.0) 8 (53.3)
      Age, mean (SD) 22.5 (1.6) 23.0 (1.5) 22.1 (1.6)
      Education level Secondary 3 (12.0) 1 (10.0) 2 (13.3)
      Tertiary 22 (88.0) 9 (90.0) 13 (86.7)
      Occupation Student 14 (56.0) 2 (20.0) 12 (80.0)
      Employed 11 (44.0) 8 (80.0) 3 (20.0)
      E-cigarette use frequency per day (times) < 10 4 (16.0) 2 (20.0) 2 (13.3)
      10−29 14 (56.0) 5 (50.0) 9 (60.0)
      > 30 7 (28.0) 3 (30.0) 4 (26.7)
      Duration of e-cigarette use (years), mean (SD) 2.3 (1.1) 2.5 (1.2) 2.2 (1.1)
      Duration of combustible cigarette use (years), mean (SD)a 3.6 (2.5) 5.2 (3.0) 3.1 (2.2)
      Residence Urban 22 (88.0) 9 (90.0) 13 (86.7)
      Rural 3 (12.0) 1 (10.0) 2 (13.3)
      a For exclusive e-cigarette users, this reflects prior combustible cigarette use history.

      Table 1. 

      Participants' demographics and tobacco use characteristics (n = 25).