Article Figures & Tables
Tables
- Table 1: Prevalence of cannabis use among Ontario middle and high school students, 2015 Ontario Student Drug Use and Health Survey (n = 9920)
Variable Unweighted count Weighted estimate (95% CI), % Cannabis use Lifetime 2087 24.1 (21.7-26.5) Previous 12 mo 1863 21.5 (19.3-23.8) Previous month 1142 13.9 (12.2-15.7) Weekly 396 4.9 (4.0-5.8) Daily 207 2.8 (2.1-3.5) Don't know what cannabis is 444 4.2 (3.5-5.0) Never used cannabis in life 7833 75.9 (73.4-78.2) Synthetic cannabis use Lifetime 147 1.6 (1.1-2.1) Previous 12 mo 112 1.3 (0.9-1.7) First time tried cannabis Never tried 7783 75.3 (72.0-77.5) Grade 6 or before 105 1.0 (0.7-1.3) Grade 7 205 1.8 (1.4-2.4) Grade 8 350 3.7 (3.1-4.4) Grade 9 627 7.0 (6.1-8.1) Grade 10 491 6.2 (5.4-7.2) Grade 11 269 3.7 (3.2-4.2) Grade 12 90 1.3 (0.9-1.7) Note: CI = confidence interval.
- Table 2: Bivariable associations between cannabis use and demographic and behavioural factors among Ontario middle and high school students*
Factor Cannabis use category;† % of respondents Total sample Lifetime use Use in previous 12 mo Use in previous month Never used in life Age, mean ± SD, yr 15.1 ± 1.8 16.4 ± 1.2‡ 16.4 ± 1.2‡ 16.4 ± 1.2‡ 14.8 ± 1.9 Sex Male 51.3 25.5 22.4 15.0 74.5 Female 48.7 22.6 20.7 12.8 77.4 Grade 7/8 25.7 3.4‡ 3.0‡ 2.2‡ 96.6 9 16.1 11.9 10.1 6.6 88.1 10 16.7 26.8 24.7 14.7 73.2 11 17.3 38.8 34.7 23.5 61.2 12 24.1 42.0 37.3 24.0 58.0 Ethnicity White 57.7 28.7‡ 25.4‡ 16.4‡ 71.3 Black 7.0 26.8 25.0 17.3 73.2 East/South East Asian 13.3 11.7 10.8 5.6 88.3 South Asian 8.8 10.9 9.0 6.2 89.1 Other 13.2 23.7 21.9 15.2 76.3 Subjective socioeconomic status Low 67.3 26.3 20.6 13.1 77.0 High 32.7 23.0 23.5 15.6 73.7 Immigration status Nonimmigrant 81.7 26.5‡ 23.7‡ 15.4‡ 73.5 Immigrant 18.3 13.4 11.6 7.6 86.6 Tobacco cigarette use in previous year No 81.9 11.8‡ 10.0‡ 5.4‡ 88.2 Yes 18.1 80.0 73.7 53.0 20.0 Alcohol use in previous past year None/sip 53.7 3.6‡ 2.8‡ 1.8‡ 96.4 Occasional 19.8 27.5 23.9 13.6 72.5 Regular 26.5 63.2 57.8 39.0 36.8 Met physical activity recommendation No 77.9 24.0 21.7 14.0 76.0 Yes 22.1 24.6 20.9 13.8 75.4 Met screen time recommendation No 64.3 24.6 21.9 14.7 75.4 Yes 35.7 23.3 20.8 12.7 76.7 Met age-appropriate sleep duration recommendation No 64.1 26.6‡ 23.9‡ 15.6‡ 73.4 Yes 35.9 19.6 17.3 10.9 80.4 Note: SD = standard deviation.
*Data are shown as weighted column percentage in "Total sample" column; weighted row percentage is used elsewhere unless indicated otherwise.
†Cannabis use measures are dichotomous; however, only "yes" responses are shown.
‡p < 0.05.
- Table 3: Logistic regression of past-year cannabis use among Ontario middle and high school students by demographic and behavioural factors*
Factor Model; OR (95% CI)† Model 1, unadjusted Model 2, adjusted‡ Model 3, adjusted§ Model 4, adjusted¶ Sex Male 1 1 1 Female 0.90 (0.73-1.13) 0.93 (0.75-1.14) 0.94 (0.73-1.19) 0.91 (0.71-1.16) Grade 7/8 1 1 1 1 9 3.65 (1.68-7.94) 3.67 (1.67-8.05) 1.63 (0.83-3.21) 1.64 (0.85-3.19) 10 10.63 (4.9-22.81) 11.18 (5.17-24.16) 3.77 (1.98-7.18) 3.71 (1.96-7.04) 11 17.24 (8.07-36.81) 17.51 (8.13-37.69) 3.75 (1.97-7.12) 3.66 (1.94-6.92) 12 19.26 (8.97-41.36) 21.15 (9.83-45.51) 3.87 (2.06-7.26) 3.85 (2.07-7.16) Ethnicity White 1 1 1 1 Black 0.98 (0.68-1.41) 1.16 (0.81-1.66) 2.70 (1.77-4.11) 2.67 (1.76-4.05) East/South East Asian 0.35 (0.26-0.49) 0.43 (0.31-0.59) 0.81 (0.58-1.14) 0.77 (0.54-1.10) South Asian 0.29 (0.21-0.41) 0.31 (0.22-0.44) 0.94 (0.58-1.52) 0.92 (0.56-1.50) Other 0.82 (0.67-1.01) 1.01 (0.78-1.31) 1.18 (0.81-1.72) 1.16 (0.79-1.71) Subjective socioeconomic status High 1 1 1 1 Low 1.19 (0.98-1.43) 1.13 (0.94-1.34) 1.03 (0.85-1.26) 1.01 (0.83-1.22) Immigration status Nonimmigrant 1 1 1 1 Immigrant 0.42 (0.32-0.56) 0.48 (0.37-0.64) 0.56 (0.39-0.79) 0.55 (0.39-0.78) Tobacco cigarette use in previous year No 1 1 1 Yes 25.18 (20.58-30.81) 10.90 (8.60-13.83) 10.10 (8.68-13.92) Alcohol use in previous year None/sip 1 1 1 Occasional 10.94 (8.24-14.52) 5.42 (4.08-7.21) 5.35 (4.01-7.13) Regular 47.53 (35.53-63.58) 14.84 (10.87-20.26) 14.6 (10.8-19.89) Met physical activity recommendation No 1.05 (0.88-1.25) 1.10 (0.87-1.38) Yes 1 1 Met screen time recommendation No 1.07 (0.91-1.26) 1.09 (0.82-1.45) Yes 1 1 Met sleep duration recommendation No 1.50 (1.25-1.81) 1.21 (0.95-1.55) Yes 1 1 Note: CI = confidence interval, OR = odds ratio.
*Models compare past-year cannabis use to no use.
†Bolded values significant at p < 0.05.
‡Adjusted for sex, grade, ethnicity, socioeconomic status and immigration status.
§Adjusted for sex, grade, ethnicity, socioeconomic status, immigration status, tobacco cigarette use and alcohol use.
¶Adjusted for sex, grade, ethnicity, socioeconomic status, immigration status, tobacco cigarette use, alcohol use, and adherence to the physical activity, screen time and sleep duration recommendations.