. Author manuscript; available in PMC: 2023 Jan 1.

Published in final edited form as: Am J Prev Med. 2021 Aug 20;62(1):57–64. doi: 10.1016/j.amepre.2021.06.003

Table 3.

Results of multi-level linear regression analyses among co-users (n=269,443), beta (standard error)

Variable	Alcohol use	Heavy drinking	Marijuana use
Student level ^a
Pre-post RML^b	−0.02 (.06)	0.05 (.06)	0.36 (.07)**
Grade 11	−1.10 (.06)**	−0.99 (.07)**	0.98 (.09)
Grade 9	−0.59 (.07)**	−0.60 (.07)**	0.74 (.09)
Female	2.02 (.03)**	−2.37 (.03)**	−3.33 (.04)**
Hispanic	0.39 (.04)**	0.44 (.04)**	0.01 (.05)
American Indian/Alaska Native	1.44 (.15)**	1.49 (.15)**	1.21 (.17)**
Asian	0.88 (.09)**	0.95 (.09)**	−0.86 (.11)**
Black	1.30 (.09)**	1.27 (.09)**	1.50 (.10)**
Native Hawaiian/Pacific Islander	0.78 (.14)**	0.76 (.13)**	0.05 (.16)
Multi-racial	0.27 (.06)**	0.27 (.06)**	0.67 (.07)**
Unknown race	1.01 (.15)**	1.10 (.15)**	0.21 (.17)*
School year	−0.05 (.01)**	−0.05 (.01)**	−0.01 (.01)
County level
Rurality	0.08 (.04)*	0.11 (.04)*	0.33 (.06)**

Note: RML – recreational marijuana legalization. Significant results are indicated in boldface (*p < .05, **p < .01).

Referent groups are 7^th graders, males, non-Hispanic students, and non-Hispanic white students.

Pre-post RML is a dummy variable coded 0 for pre-RML years (2010–11 to 2016–17) and 1 for post-RML years (2017–18 to 2018–19).