| B-LBC (1) | O-LBC (2) | N-LBC (3) | χ2 | PC$ |
---|---|---|---|---|---|
Ever smoking | Â | Â | Â | 0.09 | Â |
 Yes | 130 (18.6) | 104 (18.8) | 135 (18.2) |  |  |
 No | 569 (81.4) | 448 (81.2) | 606 (81.8) |  |  |
Smoking at least 1Â day during the 30Â days before the survey | 0.96 | Â | |||
 0 days | 108 (87.1) | 85 (82.5) | 107 (85.6) |  |  |
  ≥ 1 days | 16 (12.9) | 18 (17.5) | 18 (14.4) |  |  |
Ever drinking | Â | Â | Â | 0.77 | Â |
 Yes | 278 (39.8) | 217 (39.3) | 278 (37.6) |  |  |
 No | 421 (60.2) | 335 (60.7) | 461 (62.4) |  |  |
Drinking at least 1Â day during the 30Â days before the survey | 0.27 | Â | |||
 0 days | 188 (67.4) | 149 (69.3) | 190 (69.1) |  |  |
  ≥ 1 days | 91 (32.6) | 66 (30.7) | 85 (30.9) |  |  |
Having been sick or had uncomfortable reactions after had drunk | 9.19* | (1, 3) | |||
 0 times | 249 (89.2) | 200 (92.2) | 265 (96.0) |  |  |
  ≥ 1 times | 30 (10.8) | 17 (7.8) | 11 (4.0) |  |  |
Internet addiction | Â | Â | Â | 14.17* | (1, 3) |
 None (20–40) | 251 (47.4) | 188 (44.5) | 279 (49.4) |  |  |
 Low (41–60) | 189 (35.7) | 175 (41.5) | 230 (40.7) |  |  |
 Mild (61–80) | 79 (14.9) | 53 (12.6) | 49 (8.7) |  |  |
 Severe (81–100) | 11 (2.1) | 6 (1.4) | 7 (1.2) |  |  |