Table 3 OR and 95% CI for the presence of decayed teeth according to environmental tobacco smoke exposure at home
N with caries/total | Crude OR (95% CI) | P trend | Multivariate OR (95% CI)a | P trend | |
|---|---|---|---|---|---|
Exposure to maternal smoking | |||||
Never | 86/356 | 1.0 | 1.0 | ||
Past | 2/5 | 2.09 (0.34–12.73) | 2.24 (0.33–15.42) | ||
Current | 17/44 | 1.98 (1.03–3.80) | 1.89 (0.94–3.80) | ||
Pack-years of exposure to maternal smoking | |||||
0 | 86/356 | 1.0 | 1.0 | ||
≤ 3 | 6/23 | 1.11 (0.42–2.90) | 1.11 (0.40–3.08) | ||
> 3 | 13/26 | 3.14 (1.40–7.03) | 2.92 (1.23–6.96) | ||
Per 1 pack-year of exposure | 1.30 (1.08–1.55) | 0.005 | 1.28 (1.05–1.56) | 0.01 | |
Exposure to paternal smoking | |||||
Never | 43/206 | 1.0 | 1.0 | ||
Past | 10/27 | 2.23 (0.95–5.22) | 2.06 (0.84–5.01) | ||
Current | 52/172 | 1.64 (1.03–2.62) | 1.44 (0.88–2.37) | ||
Pack-years of exposure to paternal smoking | |||||
0 | 43/206 | 1.0 | 1.0 | ||
≤ 4 | 32/93 | 1.99 (1.15–3.43) | 1.79 (1.01–3.19) | ||
> 4 | 30/106 | 1.50 (0.87–2.57) | 1.31 (0.74–2.31) | ||
Per 1 pack-year of exposure | 1.08 (1.00–1.18) | 0.06 | 1.05 (0.96–1.15) | 0.28 | |
Pack-years of exposure to smoking by other family members | |||||
0 | 92/372 | 1.0 | 1.0 | ||
≤ 4 | 5/17 | 1.26 (0.43–3.67) | 1.14 (0.36–3.59) | ||
> 4 | 8/15 | 3.45 (1.22–9.78) | 2.28 (0.75–6.91) | ||
Per 1 pack-year of exposure | 1.19 (1.03–1.37) | 0.02 | 1.12 (0.96–1.31) | 0.14 | |
Pack-years of exposure to smoking by all family members | |||||
0 | 37/187 | 1.0 | 1.0 | ||
≤ 5 | 37/125 | 1.72 (1.02–2.92) | 1.61 (0.92–2.82) | ||
> 5 | 31/91 | 2.10 (1.19–3.68) | 1.75 (0.96–3.20) | ||
Per 1 pack-year of exposure | 1.09 (1.03–1.16) | 0.002 | 1.07 (1.01–1.14) | 0.03 | |
Urinary cotinine level (median, μg/g Cr) | |||||
Low (0.82) | 26/133 | 1.0 | 1.0 | ||
Middle (1.44) | 34/133 | 1.41 (0.79–2.52) | 1.66 (0.90–3.06) | ||
High (3.25) | 43/133 | 1.97 (1.12–3.45) | 2.02 (1.10–3.70) | ||
0.04 | 0.10 | ||||