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
| Â | 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) |