Characteristic | Crude | Adjusted | ||||
---|---|---|---|---|---|---|
OR | 95 % CI | P-value | OR | 95 % CI | P-value | |
Gender | ||||||
Male | 1.49 | 1.17–1.90 | 0.001 | 1.73 | 1.32–2.29 | <0.001 |
Female | 1.00 | Ref. | 1.00 | Ref. | ||
Age in years (continuous variable) | 1.05 | 0.98–1.12 | 0.18 | |||
Father’s education | ||||||
Low | 1.16 | 0.82–1.65 | 0.40 | |||
Medium | 0.96 | 0.62–1.47 | 0.84 | |||
High | 1.00 | Ref. | ||||
Mother’s education | ||||||
Low | 6.03 | 4.25–8.54 | <0.001 | 5.95 | 4.11–8.61 | <0.001 |
Medium | 2.22 | 1.57–3.15 | <0.001 | 2.15 | 1.49–3.09 | <0.001 |
High | 1.00 | Ref. | 1.00 | Ref. | ||
Parental smoking | ||||||
None | 1.00 | Ref. | 1.00 | Ref. | ||
One or both parents | 1.55 | 1.22–1.98 | <0.001 | 1.47 | 1.11–1.95 | <0.001 |
Friends’ smoking status | ||||||
Don’t have friends who smoke | 1.00 | Ref. | 1.00 | Ref. | ||
Have friends who smoke | 2.00 | 1.40–2.84 | <0.001 | 2.85 | 1.90–4.27 | <0.001 |
Seen any people using tobacco when watched TV, videos, or movies | ||||||
Yes | 1.11 | 0.94–1.52 | 0.18 | |||
No | 1.00 | Ref. | ||||
Smoking ban at home | ||||||
Yes | 1.00 | Ref. | ||||
No | 1.41 | 1.10–1.81 | 0.007 | |||
Smoke free school | ||||||
Yes | 1.00 | Ref. | ||||
No | 1.14 | 0.83–1.79 | 0.33 | |||
Ever seen friend smoking on the school premises | ||||||
Yes | 1.22 | 0.81–1.64 | 0.35 | |||
No | 1.00 | Ref. | ||||
Ever seen school personnel smoking on the school premises | ||||||
Yes | 1.09 | 0.87–1.24 | 0.22 | |||
No | 1.00 | Ref. | ||||
School training on tobacco harm | ||||||
Yes | 1.00 | Ref. | ||||
No | 0.95 | 0.74–1.22 | 0.71 | |||
Boys who smoke are more or less attractive | ||||||
Less attractive or no difference | 1.00 | Ref. | ||||
More attractive | 1.21 | 0.67–2.17 | 0.53 | |||
Girls who smoke are more or less attractive | ||||||
Less attractive or no difference | 1.00 | Ref. | 1.00 | Ref. | ||
More attractive | 4.69 | 2.67–8.25 | <0.001 | 7.17 | 2.81–9.52 | <0.001 |