Table 2.

Estimated Adjusted Odds Ratio of Cumulative Logit Model with Partial Proportional Odds Assumption (N=1,707)

	Dividing point of drinking stages
	Susceptible to drinking	Ever drank	Past-month drinking	Binge drinking
Age			1.64*** (0.20)
Female			1.39** (0.14)
Hispanic/Latino			2.31*** (0.33)
Academic grade level	0.60*** (0.04)	0.61*** (0.04)	0.57*** (0.04)	0.50*** (0.05)
Receiving free lunch			1.19 (0.17)
Ratio of room to people	1.12 (0.11)	1.06 (0.11)	1.06 (0.11)	1.32* (0.15)
Parental drinking	2.16*** (0.27)	1.99*** (0.24)	1.88*** (0.24)	1.66** (0.25)
Popularity (sqrt of indegrees)	1.28** (0.09)	1.24** (0.09)	1.09 (0.08)	1.14 (0.11)
Drinking exposure to friends			1.18*** (0.05)
Total number of crowds identified		1.04* (0.02)
Total number of sports participated		1.04 (0.04)
Model 1: Individual affiliation exposures
(1) Drinking exposure through crowd identity			1.24** (0.09)
(2) Drinking exposure through sports activities			1.54* (0.31)
Model 2: Decomposed affiliation exposures
(2-a) Drinking exposure through sports with shared identification	1.07 (0.12)	1.18 (0.13)	1.28* (0.14)	1.27* (0.15)
(2-b) Drinking exposure through sports without shared identification	1.20† (0.13)	1.12 (0.12)	1.04 (0.11)	1.02 (0.12)

^†p<0.1;

^*p<0.05;

^**p<0.01;

^***p<0.001 for two-tailed test;

Numbers in parentheses represent standard errors; Reported adjusted odds ratio for controlled variables (i.e., age, female, Hispanic/Latino, academic level, receiving free lunch, ratio of room to people, parental drink, popularity, drinking exposure to friends, number of crowd identified with, and number of sports participated in) were estimated based on Model 1. Models control for school identifiers and dummy marker of activity participation.