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. Author manuscript; available in PMC: 2017 Jun 27.
Published in final edited form as: Psychol Addict Behav. 2015 Nov 30;30(2):246–251. doi: 10.1037/adb0000141

Table 1.

Sample Characteristics

M (SD) N (%)
Baseline person-level variables
 Age 22.40 (1.77)
 Female 22 (28.21%)
 Employment status
  Full-time student 17 (21.79)
  Part-time student, part-time employed 12 (15.38)
  Full-time student, full-time employed 11 (14.10)
  Employed part-time 5 (6.41)
  Employed full-time 25 (32.05)
  Not employed, looking for work 8 (10.26)
FTND 2.10 (1.92)
 Smoked a full cigarette prior to age 17 years 52 (66.67)
 Number of cigarettes per day during the past 30 days
  2–5 cigs 27 (34.62)
  6–10 cigs 37 (47.44)
  11–20 cigs 13 (16.67)
  20+ cigs 1 (1.28)
 Participants reporting any EC use 20 (25.64%)
EMA day-level variables
 Days EC reported (% of days during which EC use was reported) 79 (14.47%)
 Average number of CC smoked 6.92 (3.02)
 Average daily mean: craving (1–6) 1.87 (.76)

Note. Person level (Level 2) N = 78. Day level (Level 1) N = 501. FTND = Fagerström Test for Nicotine Dependence; EC = electronic cigarettes; CC = combustible cigarettes.