Table 2

Regression analyses† of the relationship between COMPASS year, student gender, student race or ethnicity and five cannabis use outcomes

OR (95% CI)	Lifetime use	Past-year use	Weekly use	Ease of access	Age at first use
Year
2012/2013 (ref)
2013/2014	0.92 (0.87 to 0.97)*	0.92 (0.87 to 0.98)*	0.94 (0.87 to 1.02)	0.98 (0.93 to 1.03)	1.00 (0.90 to 1.11)
2014/2015	0.92 (0.87 to 0.97)*	0.94 (0.88 to 0.99)*	0.94 (0.86 to 1.02)	0.97 (0.91 to 1.03)	0.87 (0.79 to 0.97)*
2015/2016	0.88 (0.84 to 0.92)*	0.92 (0.87 to 0.97)*	0.91 (0.84 to 0.98)*	1.15 (1.08 to 1.22)*	0.87 (0.79 to 0.97)*
2016/2017	0.89 (0.83 to 0.94)*	0.94 (0.89 to 1.00)	0.90 (0.82 to 0.97)*	1.16 (1.10 to 1.23)*	0.95 (0.85 to 1.06)
2017/2018	1.04 (0.97 to 1.10)	1.11 (1.04 to 1.18)*	0.96 (0.88 to 1.04)	1.34 (1.26 to 1.43)*	1.21 (1.08 to 1.35)*
Gender
Female (ref)
Male	1.14 (1.10 to 1.18)*	1.16 (1.12 to 1.20)*	1.80 (1.70 to 1.90)*	1.23 (1.19 to 1.28)*	0.63 (0.59 to 0.66)*
Race/ethnicity
White (ref)
Black	1.50 (1.31 to 1.72)*	1.57 (1.35 to 1.82)*	2.77 (2.30 to 3.34)*	1.11 (1.01 to 1.22)*	0.21 (0.19 to 0.24)*
Asian	0.45 (0.39 to 0.52)*	0.47 (0.41 to 0.55)*	0.66 (0.56 to 0.79)*	0.39 (0.34 to 0.44)*	0.62 (0.53 to 0.72)*
Aboriginal	2.66 (2.38 to 2.97)*	2.24 (2.02 to 2.48)*	3.04 (2.71 to 3.42)*	1.10 (0.99 to 1.22)	0.30 (0.26 to 0.35)*
Hispanic	1.18 (1.09 to 1.27)*	1.11 (1.01 to 1.21)*	1.34 (1.16 to 1.56)*	1.00 (0.93 to 1.07)	0.63 (0.53 to 0.74)*

*Indicates significance at p<0.05
†Models were adjusted for grade, school median income, school urbanicity and school-level clustering.