Background
Methods
Baseline and follow-up surveys
Tobacco use measures
Sociodemographic and behavioural measures
Total | Snus use, but not smoke | Smoking, but not snus | Dual use | No tobacco | p-value** | |
---|---|---|---|---|---|---|
Participants | 1346 (100) | 149 (11) | 105 (8) | 109 (8) | 983 (73) | |
Age years, mean ± SD | 16.2 ± 1.8 | 17.0 ± 1.6 | 16.8 ± 1.6 | 16,7 ± 1.5 | 15.9 ± 1.8 | < 0.001 |
13–15 years, n (%) | 625 (100) | 40 (6) | 32 (5) | 33 (5) | 520 (83) | |
16–19 years, n (%) | 721 (100) | 109 (15) | 73 (10) | 76 (11) | 463 (64) | < 0.001 |
Parents living together | ||||||
Mother and father married/ living together, n (%) | 1116 (100) | 118 (11) | 80 (7) | 81 (7) | 837 (75) | |
Mother and father divorced/ not living together, n (%) | 187 (100) | 29 (16) | 23 (12) | 25 (13) | 110 (59) | < 0.001 |
Family smoking | ||||||
No family member smoke, n (%) | 685 (100) | 71 (10) | 35 (5) | 31 (5) | 548 (80) | |
Father or mother smokes, n (%) | 362 (100) | 41 (11) | 39 (11) | 39 (11) | 243 (67) | |
Father and mother smoke, n (%) | 235 (100) | 30 (13) | 22 (9) | 29 (12) | 154 (66) | |
Siblings and/ or others smoke, but no parent, n (%) | 59 (100) | 7 (12) | 8 (14) | 10 (17) | 34 (58) | < 0.001 |
Parental alcohol use | ||||||
Have never seen parents drunk, n (%) | 507 (100) | 21 (4) | 21 (4) | 21 (4) | 444 (88) | |
Yes, a few times, n (%) | 451 (100) | 59 (13) | 42 (9) | 42 (9) | 308 (68) | |
Yes, sometimes a year, monthly or weekly, n (%) | 347 (100) | 65 (19) | 39 (11) | 45 (13) | 198 (57) | < 0.001 |
Plans for own education | ||||||
Not yet decided, n (%) | 403 (100) | 36 (9) | 37 (9) | 30 (7) | 300 (74) | |
Vocational high school or similar, n (%) | 420 (100) | 54 (13) | 33 (8) | 44 (10) | 289 (69) | |
High school until 4 years, n (%) | 237 (100) | 25 (11) | 16 (7) | 15 (6) | 181 (76) | |
University, more than 4 years, n (%) | 242 (100) | 30 (12) | 17 (7) | 17 (7) | 178 (74) | < 0.301 |
Statistics
Results
Study participants
Current tobacco use as young adults | |||||
---|---|---|---|---|---|
No tobacco | Snus only | Smoke only | Dual use | All | |
Ever tobacco use age 13–15 | |||||
No tobacco | 260 (54.4) | 87 (18.2) | 57 (11.9) | 74 (15.5) | 478 (100) |
Snus only | 6 (12.5) | 21 (43.8) | 8 (16.7) | 13 (27.1) | 48 (100) |
Smoke only | 14 (31.1) | 7 (15.6) | 14 (31.1) | 10 (22.2) | 45 (100) |
Dual use | 7 (13.0) | 18 (33.3) | 6 (11.1) | 23 (42.6) | 54 (100) |
All | 287 (45.9) | 133 (21.3) | 85 (13.6) | 120 (19.2) | 625 (100) |
Ever tobacco use age 16–19 | |||||
No tobacco | 313 (73.1) | 74 (17.3) | 23 (5.4) | 18 (4.2) | 428 (100) |
Snus only | 24 (35.3) | 46 (40.0) | 8 (7.0) | 12 (10.4) | 115 (100) |
Smoke only | 49 (42.6) | 11 (16.2) | 20 (29.4) | 13 (19.1) | 68 (100) |
Dual use | 19 (17.3) | 32 (29.1) | 23 (20.9) | 36 (32.7) | 110 (100) |
All | 405 (56.2) | 163 (22.6) | 74 (10.3) | 79 (11.0) | 721 (100) |
Bivariable analyses
Multivariable analyses
Current smoking/dual us as young adultsa | Current snus only use as young adultsa | No tobacco use as young adultsb | ||||
---|---|---|---|---|---|---|
Adjusted for age | Adjusted for age and family smoking | Adjusted for age | Adjusted for age and family smoking | Adjusted for age | Adjusted for age and family smoking | |
N = 1050 | N = 1046 | N = 988 | N = 984 | N = 1346 | N = 1341 | |
Tobacco use at baseline: | ||||||
No tobacco | ref. | ref. | ref. | ref. | ref. | ref. |
Snus use | 2.18 (1.67–2.85) | 2.15 (1.69–2.73) | 2.87 (2.32–3.55) | 2.78 (2.24–3.44) | 0.50 (0.40–0.62) | 0.49 (0.40–0.61) |
Smoking | 2.59 (2.12–3.16) | 2.68 (2.15–3.34) | 1.51 (1.02–2.26) | 1.47 (0.98–2.22) | 0.50 (0.38–0.64) | 0.52 (0.40–0.68) |
Dual use | 3.02 (2.56–3.55) | 3.61 (3,04–4.30) | 3.04 (2.51–3.69) | 3.14 (2.53–3.89) | 0.23 (0.16–0.33) | 0.24 (0.16–0.34) |