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Table 1 Characteristics of students, current e-cigarette users and nonusers in Hong Kong

From: Electronic cigarette use among adolescents: a cross-sectional study in Hong Kong

  Full sample Current e-cigarette usersa Nonusers
(N = 45857; 100 %) (n = 560; 1.1 %) (n = 45297; 98.9 %)
No. (%) No. (%) No. (%)
Age, mean (SD) 14.8 (1.9) 15.4 (2.0) 14.8 (1.9)
Sex
  Girl 21117 (48.6) 166 (29.3) 20951 (48.8)
  Boy 24740 (51.4) 394 (70.7) 24346 (51.2)
Parental smoking
  No 30648 (68.7) 315 (60.2) 30333 (68.8)
  Yes 15209 (31.3) 245 (39.8) 14964 (31.2)
Peer smoking
  No 27149 (60.9) 106 (18.3) 27043 (61.4)
  Less than half 14568 (30.8) 195 (36.4) 14373 (30.8)
  Half or more 4068 (8.3) 254 (45.3) 3814 (7.9)
Knowledge about the harm of cigarette smoking
  Good 40604 (89.1) 312 (56.1) 40292 (89.5)
  Poor 5235 (10.9) 248 (43.9) 4987 (10.5)
Attitudes toward smoking
  Negative 33878 (75.8) 167 (31.7) 33711 (76.3)
  Neutral 10454 (21.4) 248 (44.1) 10206 (21.1)
  Positive 1304 (2.8) 140 (24.2) 1164 (2.5)
Cigarette smokingb
  Never smoker 37740 (85.1) 65 (11.7) 37675 (85.9)
  Experimental smoker 3721 (7.6) 77 (15.8) 3644 (7.5)
  Former smoker 1899 (3.9) 153 (39.3) 1746 (3.6)
  Current smoker 1694 (3.3) 171 (33.2) 1523 (3.0)
Other tobacco usec
  No 44459 (97.0) 323 (57.6) 44136 (97.4)
  Yes 1398 (3.0) 237 (42.4) 1161 (2.6)
Alcohol consumption
  Non-drinker 29633 (66.8) 103 (16.0) 29530 (67.4)
  <1 day/month 8221 (18.4) 81 (15.9) 8140 (18.4)
  ≥1 day/month 6846 (14.8) 354 (68.1) 6492 (14.2)
  1. Note
  2. aCurrent e-cigarette users reported e-cigarette use within the past 30 days
  3. bNever smokers have never smoked a cigarette; Experimental smokers smoked once or a few times; Former smokers smoked in the past but not now; Current smokers reported smoking now and smoked on at least one day in the past 30 days
  4. cOther tobacco use includes using any of the following in the past 30 days: waterpipe, chewing tobacco, cigars, snus, smoking pipe/snuff, or any other form of tobacco (other than cigarettes and e-cigarettes)