Table 4.
Odds ratios (OR) and 95% confidence intervals (CI) for smoked in privately owned vehicles, smoked in privately owned vehicles transporting children age <16 years, and knowledge about legislation prohibiting smoking in cars with children present according to potential socio-demographic correlates (N = 754), Québec, 2011–12
| Smoked in privately owned vehicle (n = 746) | Smoked in privately owned vehicle with children age <16 years (n = 747) | Knowledge about legislation prohibiting smoking in cars with children present (n = 748) | |||||||
|---|---|---|---|---|---|---|---|---|---|
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| % | OR | (95% CI) | % | OR | (95% CI) | % | OR | (95% CI) | |
| Sex | |||||||||
| Male | 70.0 | Ref. | 20.5 | Ref. | 41.6 | Ref. | |||
| Female | 60.1 | 0.57** | 0.41–0.80 | 25.6 | 1.32 | 0.89–1.96 | 33.6 | 0.74 | 0.54–1.02 |
| Age, years | |||||||||
| ≤34 | 68.5 | Ref. | 19.8 | Ref. | 37.9 | Ref. | |||
| 35–44 | 66.8 | 0.69 | 0.46–1.03 | 27.2 | 1.39 | 0.87–2.22 | 37.5 | 0.82 | 0.56–1.19 |
| 45–54 | 64.1 | 0.52** | 0.32–0.84 | 31.2 | 1.35 | 0.79–2.31 | 40.8 | 0.99 | 0.63–1.55 |
| ≥55 | 47.4 | 0.23*** | 0.13–0.39 | 11.3 | 0.26*** | 0.12–0.54 | 27.8 | 0.58* | 0.34–0.98 |
| Highest completed level of education | |||||||||
| Elementary or high school | 65.7 | Ref. | 28.5 | Ref. | 35.3 | Ref. | |||
| CEGEP | 66.5 | 1.04 | 0.71–1.54 | 22.2 | 0.64 | 0.41–1.00 | 37.3 | 1.01 | 0.70–1.45 |
| University | 57.6 | 0.83 | 0.53–1.29 | 11.1 | 0.31*** | 0.16–0.57 | 41.7 | 1.19 | 0.78–1.82 |
| Annual household income | |||||||||
| <$20,000 | 66.3 | Ref. | 35.0 | Ref. | 31.3 | Ref. | |||
| $20–$39,999 | 66.7 | 1.30 | 0.69–2.44 | 28.6 | 0.93 | 0.49–1.79 | 37.6 | 1.41 | 0.77–2.58 |
| $40–$59,999 | 66.7 | 1.31 | 0.69–2.48 | 23.1 | 0.81 | 0.41–1.58 | 35.4 | 1.25 | 0.68–2.28 |
| $60–$79,999 | 62.7 | 1.05 | 0.53–2.07 | 17.5 | 0.65 | 0.30–1.39 | 42.7 | 1.62 | 0.85–3.08 |
| ≥$80,000 | 63.4 | 1.38 | 0.71–2.72 | 17.0 | 0.99 | 0.47–2.09 | 47.1 | 1.98* | 1.0–3.74 |
| Missing | 60.7 | 1.04 | 0.55–1.96 | 23.7 | 0.80 | 0.41–1.58 | 25.9 | 0.78 | 0.41–1.46 |
| Adult non-smoker lives in household | |||||||||
| No | 64.7 | Ref. | 26.7 | Ref. | 35.2 | Ref. | |||
| Yes | 63.9 | 1.10 | 0.78–1.55 | 19.6 | 0.89 | 0.59–1.33 | 39.2 | 1.10 | 0.80–1.53 |
| Smoking prohibited at home | |||||||||
| No | 75.0 | Ref. | 36.8 | Ref. | 38.7 | Ref. | |||
| Yes | 52.8 | 0.24*** | 0.17–0.35 | 8.9 | 0.16*** | 0.10–0.25 | 35.2 | 0.68* | 0.48–0.94 |
| Nagelkerke's Pseudo R2 | 0.153 | 0.245 | 0.053 | ||||||
Notes: Participants with missing data were not included in the multivariable analysis. The model included all variables in the table concurrently.
*
p < 0.05;
**
p < 0.01;
***
p < 0.001.