Article Figures & Tables
Tables
- Table 1:
Sociodemographic and other characteristics of Canadian grade 11 and 12 students who participated in the 2016–2017 Canadian Student Tobacco, Alcohol and Drugs Survey
Variable No. of respondents
n = 14 520Weighted % (95% CI) Sex Female 7262 48.9 (48.1–49.7) Male 7258 51.1 (50.3–51.9) School grade 11 8257 51.2 (50.4–52.0) 12 6263 48.8 (48.0–49.6) Rural setting No 10 799 82.6 (82.0–83.2) Yes 3721 17.4 (16.8–18.0) Province Ontario 3557 51.8 (51.0–52.6) Quebec 675 9.6 (9.1–10.1) British Columbia 1929 14.0 (13.4–14.6) Alberta 2590 12.0 (11.5–12.5) Saskatchewan 802 3.5 (3.2–3.8) Manitoba 983 4.5 (4.2–4.8) Nova Scotia 1070 2.8 (2.5–3.1) Prince Edward Island 1133 0.4 (0.3–0.5) Newfoundland and Labrador 1781 1.4 (1.2–1.6) Square transformation of autonomy score High 2565 18.3 (17.7–19.0) Moderate 3895 28.5 (27.8–29.3) Low 3373 23.2 (22.5–23.9) Very low 4687 30.0 (29.2–30.7) Perceived risk of regular cannabis use No risk 2092 11.9 (11.4–12.4) Slight risk 2454 15.6 (15.0–16.2) Moderate risk 3488 24.9 (24.2–25.6) Great risk 5245 40.7 (39.9–41.5) Don’t know or not stated 1241 6.9 (6.5–7.3) DUIC No, never 12 480 88.9 (88.4–89.4) Yes, in the last 30 days 907 4.9 (4.6–5.3) Yes, more than 30 days ago 760 3.9 (3.6–4.2) Missing 373 2.3 (2.1–2.6) RWCD No, never 10 137 74.8 (74.1–75.5) Yes, in the last 30 days 2008 11.6 (11.1,12.1) Yes, more than 30 days ago 2025 11.5 (11.0–12.0) Missing 350 2.1 (1.9–2.3) Note: CI = confidence interval, DUIC = driving under the influence of cannabis, RWCD = riding with a cannabis-impaired driver.
- Table 2:
Multinomial logistic regression of driving under the influence of cannabis 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 DUIC
n = 14 147RR (95% CI) Adjusted RR* (95% CI) No. Weighted %† DUIC in past 30 days v. never DUIC more than 30 days ago v. never DUIC in past 30 days v. never DUIC more than 30 days ago v. never Perceived risk of regular cannabis use No risk (reference) 2061 12.1 1.00 1.00 1.00 1.00 Slight risk 2430 15.7 0.54 (0.39–0.75) 0.65 (0.49–0.85) 0.56 (0.39–0.80) 0.67 (0.51–0.88) Moderate risk 3458 25.3 0.17 (0.13–0.22) 0.30 (0.23–0.39) 0.19 (0.14–0.27) 0.34 (0.26–0.44) Great risk 5205 41.4 0.05 (0.03–0.08) 0.09 (0.06–0.12) 0.06 (0.04–0.10) 0.11 (0.08–0.15) Don’t know or not stated 993 5.5 NA NA NA NA Sex Female (reference) 7126 49.2 1.00 1.00 1.00 1.00 Male 7021 50.8 2.17 (1.56–3.02) 1.80 (1.39–2.33) 1.74 (1.25–2.41) 1.50 (1.17–1.93) School grade 11 (reference) 8043 51.2 1.00 1.00 1.00 1.00 12 6104 48.8 1.91 (1.48–2.47) 1.86 (1.44–2.39) 1.91 (1.51–2.42) 1.83 (1.42–2.36) Rural setting No (reference) 10 516 82.6 1.00 1.00 1.00 1.00 Yes 3631 17.4 2.17 (1.59–2.95) 1.72 (1.12–2.65) 1.70 (1.30–2.24) 1.24 (0.90–1.71) Province Ontario (reference) 3475 51.7 1.00 1.00 1.00 1.00 Quebec 670 9.8 0.66 (0.34–1.30) 0.72 (0.37–1.40) 1.59 (0.81–3.13) 1.50 (0.78–2.89) British Columbia 1882 14.0 1.36 (0.78–2.37) 1.58 (0.86–2.89) 1.25 (0.72–2.17) 1.51 (0.81–2.84) Alberta 2533 12.0 1.70 (1.12–2.57) 2.16 (1.32–3.53) 1.37 (0.99–1.91) 1.90 (1.23–2.95) Saskatchewan 788 3.5 3.08 (1.94–4.88) 3.55 (2.19–5.74) 2.10 (1.34–3.29) 2.91 (1.82–4.67) Manitoba 962 4.5 1.47 (0.94–2.31) 2.32 (1.41–3.81) 1.04 (0.74–1.47) 1.88 (1.20–2.96) Nova Scotia 1033 2.7 3.39 (2.41–4.77) 3.61 (2.32–5.60) 2.59 (1.88–3.58) 2.89 (1.90–4.39) Prince Edward Island 1103 0.4 2.13 (1.29–3.51) 2.44 (1.50–3.97) 1.44 (1.07–1.93) 2.02 (1.23–3.31) Newfoundland and Labrador 1701 1.4 2.28 (1.39–3.74) 2.67 (1.71–4.16) 1.82 (1.14–2.89) 2.22 (1.45–3.43) Square transformation of autonomy score High (reference) 2536 18.4 1.00 1.00 1.00 1.00 Moderate 3864 29.0 1.09 (0.75–1.58) 1.15 (0.87–1.52) 0.99 (0.69–1.43) 1.05 (0.78–1.40) Low 3317 23.4 1.05 (0.72–1.54) 1.44 (1.04–2.01) 0.87 (0.58–1.30) 1.21 (0.88–1.68) Very low 4430 29.2 1.91 (1.27–2.87) 1.76 (1.30–2.39) 1.39 (0.90–2.14) 1.37 (1.02–1.84)§ F statistic F(36–464) = 48.13, p < 0.001 Note: CI = confidence interval, DUIC = driving under the influence of cannabis, NA = not applicable, RR = relative risk.
↵* 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 14 147 cases.
- 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 170RR (95% CI) Adjusted RR* (95% CI) 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 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) 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) Don’t know or not stated 999 5.6 NA NA NA NA Sex Female (reference) 7143 49.4 1.00 1.00 1.00 1.00 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) School grade 11 (reference) 8062 51.2 1.00 1.00 1.00 1.00 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) Rural setting No (reference) 10 538 82.6 1.00 1.00 1.00 1.00 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) Province Ontario (reference) 3480 51.8 1.00 1.00 1.00 1.00 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) 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) 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) 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) 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) 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) 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) 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) Square transformation of autonomy score High (reference) 2545 18.6 1.00 1.00 1.00 1.00 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) 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) 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) 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.