Table 3:
Multinomial logistic regression of riding with a cannabis-impaired driver among Canadian students in grades 11 and 12 who participated in the 2016–2017 Canadian Student Tobacco, Alcohol and Drugs Survey
Variable | Respondents who reported RWCD n = 14 170 |
RR (95% CI) | Adjusted RR* (95% CI) | |||
---|---|---|---|---|---|---|
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No. | Weighted %† | RWCD in past 30 days v. never | RWCD more than 30 days ago v. never | RWCD in past 30 days v. never | RWCD more than 30 days ago v. never | |
Perceived risk of regular cannabis use | ||||||
| ||||||
No risk (reference) | 2066 | 12.0 | 1.00 | 1.00 | 1.00 | 1.00 |
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Slight risk | 2436 | 15.8 | 0.55 (0.45–0.68) | 0.84 (0.66–1.06) | 0.57 (0.46–0.69) | 0.87 (0.69–1.10) |
| ||||||
Moderate risk | 3463 | 25.3 | 0.28 (0.23–0.34) | 0.51 (0.41–0.64) | 0.28 (0.23–0.35) | 0.52 (0.42–0.65) |
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Great risk | 5206 | 41.3 | 0.08 (0.06–0.11) | 0.22 (0.18–0.28) | 0.09 (0.07–0.12) | 0.24 (0.19–0.29) |
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Don’t know or not stated | 999 | 5.6 | NA | NA | NA | NA |
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Sex | ||||||
| ||||||
Female (reference) | 7143 | 49.4 | 1.00 | 1.00 | 1.00 | 1.00 |
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Male | 7027 | 50.6 | 1.18 (0.98–1.44) | 0.92 (0.77–1.10) | 0.90 (0.74–1.10) | 0.77 (0.63–0.94) |
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School grade | ||||||
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11 (reference) | 8062 | 51.2 | 1.00 | 1.00 | 1.00 | 1.00 |
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12 | 6108 | 48.8 | 1.46 (1.16–1.85) | 1.51 (1.31–1.73) | 1.49 (1.17–1.89) | 1.60 (1.37–1.85) |
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Rural setting | ||||||
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No (reference) | 10 538 | 82.6 | 1.00 | 1.00 | 1.00 | 1.00 |
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Yes | 3632 | 17.4 | 1.62 (1.22–2.15) | 1.51 (1.05–2.17) | 1.34 (1.05–1.72) | 1.17 (0.86–1.60) |
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Province | ||||||
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Ontario (reference) | 3480 | 51.8 | 1.00 | 1.00 | 1.00 | 1.00 |
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Quebec | 672 | 9.7 | 1.01 (0.66–1.54) | 1.22 (0.88–1.68) | 1.90 (1.19–3.04) | 2.04 (1.45–2.86) |
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British Columbia | 1874 | 13.9 | 1.36 (0.91–2.04) | 1.25 (0.84–1.86) | 1.31 (0.89–1.93) | 1.26 (0.84–1.91) |
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Alberta | 2541 | 12.0 | 1.53 (1.06–2.21) | 2.19 (1.48–3.23) | 1.32 (0.98–1.76) | 2.07 (1.44–2.98) |
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Saskatchewan | 788 | 3.5 | 1.87 (1.10–3.18) | 2.74 (1.86–4.02) | 1.45 (0.82–2.57) | 2.48 (1.56–3.96) |
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Manitoba | 963 | 4.5 | 1.55 (1.06–2.26) | 1.56 (1.15–2.12) | 1.21 (0.85–1.73) | 1.40 (1.04–1.88) |
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Nova Scotia | 1043 | 2.8 | 3.52 (2.66–4.67) | 3.27 (2.54–4.20) | 2.77 (2.15–3.56) | 2.88 (2.24–3.71) |
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Prince Edward Island | 1107 | 0.4 | 1.86 (1.26–2.77) | 2.10 (1.62–2.72) | 1.49 (1.10–2.01) | 1.93 (1.40–2.67) |
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Newfoundland and Labrador | 1702 | 1.4 | 2.24 (1.69–2.96) | 2.28 (1.73–3.00) | 1.86 (1.41–2.44) | 2.09 (1.57–2.78) |
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Square transformation of autonomy score | ||||||
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High (reference) | 2545 | 18.6 | 1.00 | 1.00 | 1.00 | 1.00 |
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Moderate | 3870 | 29.0 | 1.06 (0.78–1.44) | 1.33 (1.03–1.72) | 0.95 (0.68–1.31) | 1.22 (0.93–1.60) |
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Low | 3331 | 23.4 | 1.43 (1.03–1.99) | 1.24 (0.88–1.73) | 1.25 (0.87–1.79) | 1.14 (0.82–1.58) |
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Very low | 4424 | 29.0 | 1.50 (1.14–1.98) | 1.53 (1.18–2.00) | 1.15 (0.86–1.53) | 1.32 (0.97–1.79) |
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F statistic | F(36–464) = 39.27, p < 0.001 |
Note: CI = confidence interval, NA = not applicable, RR = relative risk, RWCD = riding with a cannabis-impaired driver.
Adjusted for perceived risk of regular cannabis use, sex, school grade, rural setting, province and square transformation of autonomy score.
The weighted prevalence estimates are based on 14 170 cases.