Table 1.
Characteristics of the participants of 2014, 2015, and 2016
| Characteristics | 2014 (n = 751) |
2015 (n = 751) |
2016 (n = 715) |
Comparison between 2014 and 2015 | Comparison between 2014 and 2016 | |||
|---|---|---|---|---|---|---|---|---|
| n (%) | [95% CI] | n (%) | [95% CI] | n (%) | [95% CI] | p value | p value | |
| Sociodemographic characteristics | ||||||||
| Males | 365 (48.7) | 45.1, 52.3 | 346 (46.9) | 43.3,50.5 | 323 (46.7) | 43.0,50.4 | 0.419 | 0.415 |
| Age > 13 years | 325 (43.4) | 39.9,46.9 | 354 (47.5) | 43.9,51.1 | 354 (49.9) | 46.2,53.6 | 0.120 | 0.013b |
| Lifetime tobacco use | 82 (11.0) | 8.8,13.2 | 92 (12.5) | 10.1,14.9 | 123 (17.3) | 14.5,20.1 | 0.358 | 0.001 |
| Male | 68 (18.7) | 15.9,21.5 | 70 (20.6) | 17.7,23.5 | 78 (24.5) | 21.3,27.6 | 0.536 | 0.070 |
| Female | 14 (3.7) | 2.3,5.1 | 17 (4.5) | 3.0,6.0 | 43 (11.7) | 9.3,14.1 | 0.578 | < 0.001b |
| ≤13 years | 26 (6.2) | 4.5, 7.9 | 35 (9.0) | 7.0,11.0 | 49 (13.9) | 11.4,16.4 | 0.131 | < 0.001b |
| > 13 years | 55 (17.0) | 14.3,19.7 | 57 (16.7) | 14.0,19.4 | 74 (21.1) | 18.1,24.1 | 0.914 | 0.182 |
| Current tobacco use | 25 (3.4) | 2.1,4.7 | 36 (5.0) | 3.4,6.5 | 29 (4.1) | 2.6,5.5 | 0.131 | 0.446 |
| Male | 23 (6.4) | 4.6,8.1 | 30 (9.0) | 6.9,11.0 | 21 (6.7) | 4.9,8.5 | 0.204 | 0.899 |
| Female | 2 (0.5) | 0.0,1.0 | 3 (0.8) | 0.2,1.4 | 7 (1.9) | 0.9,2.9 | 0.652 | 0.102 |
| ≤13 years | 12 (2.9) | 1.7,4.1 | 15 (3.9) | 2.5,5.3 | 10 (2.8) | 1.6,4.0 | 0.410 | 0.976 |
| > 13 years | 12 (3.8) | 2.4,5.2 | 21 (6.2) | 4.5,7.9 | 19 (5.6) | 3.9,7.3 | 0.155 | 0.275 |
| Tobacco cessation intention among current smokers | 12 (48.0) | 44.4,51.6 | 12 (34.3) | 30.9,37.7 | 8 (30.8) | 27.4,34.2 | 0.287 | 0.211 |
| Lifetime illicit substances use | 4 (0.5) | 0.0,1.0 | 6 (0.8) | 0.2,1.4 | 4 (0.6) | 0.03,1.2 | 0.523 | 0.425 |
| Male | 3 (0.8) | 0.2,1.4 | 4 (1.2) | 0.4,2.0 | 3 (0.9) | 0.2,1.6 | 0.655 | 0.890 |
| Female | , | 0.0,0.4 | 2 (0.5) | 0.0,1.0 | 1 (0.3) | 0.0,0.7 | 0.994 | 0.994 |
| ≤13 years | 2 (0.5) | 0.0,1.0 | 3 (0.8) | 0.2,1.4 | – | – | 0.600 | 0.994 |
| > 13 years | 1 (0.3) | 0.0,0.7 | 3 ((0.9) | 0.2,1.6 | 4 (1.2) | 0.4,2.0 | 0.371 | 0.239 |
| Purchase of illicit substances | 14 (1.9) | 0.9,2.9 | 51 (7.0) | 5.2,8.8 | 32 (4.6) | 3.1,6.1 | < 0.001a | 0.005b |
| Male | 8 (2.3) | 1.2,3.4 | 30 (8.9) | 6.9,10.9 | 16 (5.1) | 3.5,6.7 | < 0.001a | 0.055b |
| Female | 6 (1.6) | 0.7,2.5 | 21 (5.5) | 3.9,7.1 | 15 (4.2) | 2.7,5.7 | 0.006a | 0.043b |
| ≤13 years | 10 (2.4) | 1.3,3.5 | 31 (8.0) | 6.1,9.9 | 15 (4.3) | 2.8,5.8 | 0.001a | 0.143 |
| > 13 years | 4 (1.3) | 0.5,2.1 | 20 (5.8) | 4.1,7.5 | 16 (4.6) | 3.1,6.1 | 0.004a | 0.018b |
| Lifetime inhalants use | 6 (0.8) | 0.2,1.4 | 22 (3.0) | 1.8,4.2 | 40 (5.7) | 4.0,7.4 | 0.004a | < 0.001b |
| Male | 2 (0.6) | 0.1,1.1 | 10 (2.9) | 1.7,4.1 | 15 (4.7) | 3.1,6.2 | 0.015a | 0.001b |
| Female | 4 (1.0) | 0.3,1.7 | 12 (3.1) | 1.9,4.3 | 25 (6.9) | 5.0,8.7 | 0.044a | < 0.001b |
| ≤ 13 years | 1 (0.2) | 0.0,0.5 | 12 (3.1) | 1.9,4.3 | 26 (7.4) | 5.5,9.3 | 0.013a | 0.001b |
| > 13 years | 5 (1.6) | 0.7,2.5 | 10 (2.9) | 1.7,4.1 | 13 (3.8) | 2.4,5.2 | 0.249 | 0.090b |
| Tobacco use among | ||||||||
| Father | 363 (49.1) | 45.5,52.7 | 335 (45.8) | 42.2,49.4 | 337 47.3) | 43.6,51.0 | 0.215 | 0.511 |
| Mother | 4 (0.5) | 0.0,1.0 | 13 (1.8) | 0.8,2.7 | 4 (0.6) | 0.03,1.2 | 0.036a | 0.956 |
| Siblings | 108 (14.6) | 12.1,17.1 | 99 (13.5) | 11.1,15.9 | 108 (15.2) | 12.6,17.8 | 0.562 | 0.759 |
| Illicit substances use among | ||||||||
| Parents | 5 (0.7) | 0.1,1.3 | 4 (0.5) | 0.0,1.0 | 6 (0.9) | 0.2,1.6 | 0.757 | 0.690 |
| Siblings | 2 (0.3) | 0.0,0.7 | 2 (0.3) | 0.0,5.2 | 1 (0.1) | 0.0,0.3 | 0.987 | 0.604 |
| Friends | 19 (2.6) | 1.5,3.7 | 43 (5.9) | 4.2,7.6 | 43 (6.1) | 4.3,7.8 | 0.002a | 0.001b |
| Current psychological symptoms | ||||||||
| Depressive mood | 165 (22.0) | 19.0,25.0 | 173 (23.0) | 20.0,26.0 | 190 (26.6) | 23.4,29.8 | 0.895 | 0.115 |
| Anxiety | 274 (36.5) | 33.1,39.9 | 305 (40.6) | 37.1,44.1 | 300 (42.0) | 38.4,45.6 | 0.263 | 0.101 |
| Insomnia | 514 (68.4) | 65.1,71.7 | 497 (66.2) | 62.8,69.6 | 497 (69.5) | 66.1,72.9 | 0.157 | 0.433 |
| Stress | 169 (22.5) | 19.5,25.5 | 238 (31.7) | 28.4,35.0 | 208 (29.1) | 25.8,32.4 | < 0.001a | 0.019b |
CI Confidence Interval
“a”: significant difference between 2014 and 2015
“b”: significant difference between 2014 and 2016