Table 2.
Variables | Crude | Adjusted | |||||
---|---|---|---|---|---|---|---|
OR | 95% CI | p | OR | 95% CI | p | ||
Geographical location | |||||||
Urban | 1 | 1 | |||||
Rural | 1.77 | 1.24–2.51 | 0.002 | 1.23 | 0.86–1.77 | 0.264 | |
Age (years) | 1 | ||||||
10–12 | 1 | ||||||
13–15 | 0.96 | 0.70–1.33 | 0.805 | 0.76 | 0.54–1.07 | 0.117 | |
16–19 | 1.26 | 0.88–1.80 | 0.216 | 0.75 | 0.51–1.11 | 0.15 | |
Sex | |||||||
Female | 0.6 | 0.49–0.74 | <0.001 | 0.73 | 0.59–0.91 | 0.005 | |
Male | 1 | 1 | |||||
Weekly spending money (NGN) | |||||||
None | 1 | 1 | |||||
≤100 | 1.25 | 1.01–1.55 | 0.043 | 1.1 | 0.88–1.39 | 0.405 | |
>100 | 2.13 | 1.67–2.71 | <0.001 | 1.67 | 1.29–2.17 | <0.001 | |
Parents’ work status | |||||||
None | 1 | 1 | |||||
One parent | 0.89 | 0.62–1.26 | 0.499 | 0.95 | 0.65–1.41 | 0.815 | |
Both parents | 0.5 | 0.35–0.70 | <0.001 | 0.58 | 0.39–0.86 | 0.006 | |
Parents live together | |||||||
Yes | 1 | 1 | |||||
No | 1.59 | 1.26–2.01 | 0<0.001 | 1.26 | 0.97–1.63 | 0.08 | |
Father’s SES | |||||||
Low | 1 | 1 | |||||
High | 0.94 | 0.76–1.17 | 0.58 | 0.77 | 0.55–1.06 | 0.111 | |
Exposure to secondhand smoke | |||||||
Yes | 2.44 | 1.98–3.01 | <0.001 | 2.01 | 1.59–2.54 | <0.001 | |
No | 1 | 1 | |||||
Exposure to anti-tobacco messages | |||||||
Yes | 1 | 1 | |||||
No | 1.32 | 1.04–1.68 | 0.023 | 1.12 | 0.84–1.48 | 0.438 | |
Taught about tobacco in school | |||||||
Yes | 0.73 | 0.60–0.88 | 0.001 | 0.59 | 0.47–0.75 | <0.001 | |
No | 1 | 1 | |||||
Exposed to tobacco advertisements | |||||||
Yes | 1.72 | 1.37–2.16 | <0.001 | 1.39 | 1.07–1.80 | 0.013 | |
No | 1 | 1 | |||||
Have smoking parents | |||||||
None | 1 | 1 | |||||
One parent | 2.73 | 2.08–3.60 | <0.001 | 1.51 | 1.10–2.08 | 0.01 | |
Both parents | 3.9 | 2.57–5.91 | <0.001 | 2.26 | 1.43–3.57 | <0.001 | |
Have smoking friends | |||||||
None | 1 | 1 | |||||
Some | 3.33 | 2.61–4.24 | <0.001 | 2.06 | 1.56–2.71 | <0.001 | |
Most | 6.08 | 3.71–9.96 | <0.001 | 3.39 | 1.96–5.86 | <0.001 | |
All | 19.75 | 11.41–34.18 | <0.001 | 7.08 | 3.85–13.04 | <0.001 | |
Have smoking classmates | |||||||
None | 1 | 1 | |||||
Some | 2.16 | 1.70–2.73 | <0.001 | 1.3 | 0.99–1.70 | 0.056 | |
Most | 3.76 | 2.55–5.53 | <0.001 | 1.49 | 0.95–2.34 | 0.081 | |
All | 13.75 | 7.62–24.83 | <0.001 | 4.56 | 2.31–9.00 | <0.001 | |
Sale of cigarettes near school | |||||||
Yes | 2.49 | 1.98–3.13 | <0.001 | 1.79 | 1.39–2.31 | <0.001 | |
No | 1 | 1 | |||||
Interaction between father’s SES and school location | |||||||
Yes | 1.86 | 1.17–2.94 | 0.008 | ||||
No | 1 |
Null model variance (SE) = 0.356 (0.095). Full model variance (SE) = 0.225 (0.07). NGN: Nigerian Naira, 100 NGN about 0.27 US$.