Table 2.

GLMM results for association between location and substance use

	Alc [ref] v. SAMa			CB [ref] v. SAMb			Alc [ref] v. CBc
	OR	CI	p	OR	CI	p	OR	CI	p
Covariate and Situational Indicator Model
Sex	1.99	1.17 – 3.38	0.011	0.85	0.58 – 1.24	0.390	2.65	1.33 – 5.27	0.006
Age	1.06	0.87 – 1.31	0.555	1.31	1.14 – 1.52	<0.001	0.78	0.60 – 1.02	0.070
School B	2.01	1.06 – 3.80	0.032	0.95	0.60 – 1.50	0.822	2.56	1.11 – 5.88	0.027
School C	0.91	0.47 – 1.76	0.789	0.92	0.57 – 1.48	0.719	0.97	0.41 – 2.27	0.945
ODU	2.19	1.25 – 3.83	0.006	5.79	3.45 – 9.71	<0.001	0.42	0.22 – 0.81	0.009
Weekend	1.06	0.85 – 1.31	0.607	2.82	2.36 – 3.35	<0.001	0.42	0.36 – 0.50	<0.001
Evening	2.85	2.03 – 4.01	<0.001	5.59	4.26 – 7.33	<0.001	0.72	0.59 – 0.88	0.002
Primary Indicator Models
Home	1.28	1.01 – 1.62	0.042	0.37	0.29 – 0.45	<0.001	3.31	2.69 – 4.08	<0.001
Friend’s place	1.53	1.20 – 1.94	0.001	2.60	2.11 – 3.21	<0.001	0.77	0.62 – 0.95	0.014
Party	1.43	1.00 – 2.06	0.049	-	-	-	-	-	-
Bar/restaurant	0.46	0.34 – 0.64	<0.001	-	-	-	-	-	-

Note. Covariate model intraclass correlations (ICCs), conditional R², Number of individuals (N_id), and N_observations (N_obs) for each outcome –

^aICC = .48, R² = .515, N_id = 268, N_obs = 2862;

^bICC = .26, R² = .398, N_id = 244, N_obs = 4827;

^cICC = .68, R² = .699, N_id = 298, N_obs = 5837. The primary indicators in the second panel show results from four separate models that included all of the covariates from the first panel. Full model effects for each primary indicator are provided in supplemental materials, Tables S1–S3. ODU = other drug use, school A = illegal; school B = decriminalized, school C = legal, reference group for both school effects = school A (illegal); evening = survey completed after 5pm. Statistically significant effects are in bold typeface. Cells with no data were models that were not conducted due to small number of observations in those comparisons. Alc=alcohol-only occasion; CB=cannabis-only occasion; SAM=simultaneous alcohol and cannabis use occasion.