Table 3.

SAOM selection and influence results.

	Parameter	Estimate (SE)	Odds Ratio (95% CI)	p-value
Effects on Friendship Tie Formation and Maintenance (Selection)	Marijuana Use Similarity	0.58 (0.06)	1.79 (1.59 – 2.01)	<0.001
	Marijuana Use Alter	0.03 (0.02)	1.03 (1 – 1.07)	0.064
	Marijuana Use Ego	−0.01 (0.02)	0.99 (0.96 – 1.02)	0.567
	Marijuana Lifetime at T1 Alter	0.04 (0.03)	1.04 (0.99 – 1.1)	0.148
	Marijuana Lifetime at T1 Ego	−0.03 (0.03)	0.97 (0.9 – 1.03)	0.297
	Marijuana Lifetime at T1 Homophily	0.04 (0.02)	1.04 (1 – 1.08)	0.050
Effects on Marijuana Use Behaviors (Influence)	Marijuana Use Average Alter	0.31 (0.05)	1.36 (1.24 – 1.50)	<0.001
	Marijuana Use Indegree	0.05 (0.02)	1.05 (1.01 – 1.08)	0.009
	Marijuana Use Outdegree	0 (0.01)	1.00 (0.97 – 1.03)	0.842
	Marijuana Use: Effect from Lifetime at T1 Marijuana Use	0.4 (0.08)	1.49 (1.28 – 1.73)	<0.001

Notes. Marijuana use reflects past 30-day use. SAOM results including control variables can be found in Tables 1 and 2 in Supplemental Materials. Terms are further explained in Supplemental Materials.