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. Author manuscript; available in PMC: 2017 Jan 1.

Published in final edited form as: Addict Behav. 2015 Sep 1;52:52–57. doi: 10.1016/j.addbeh.2015.08.009

Table 4.

Influence of Companions on 21^st Birthday Drinking and eBAC

Companion	Number of Drinks R² = .23				eBAC R² = .20

	b	SE(b)	β	t	b	SE(b)	β	t
Intercept	4.22	.61	--	6.91^***	.077	.01	--	5.68^***
Fraternity/Sorority	6.34	.50	.37	12.58^***	.12	.01	.33	10.89^***
Friends	2.41	.59	.12	4.07^***	.06	.01	.13	4.25^***
Romantic Partner	−1.55	.39	−.12	−4.03^***	−.03	.01	−.11	−3.55^***
Casual Acquaintances	1.71	.44	.12	3.92^***	.03	.01	.11	3.45^***
Roommate	1.31	.39	.10	3.32^***	.04	.01	.14	4.39^***
Family	−.35	.37	−.03	−.94	−.01	.01	−.03	−.90
Alone	−2.17	2.14	−.03	−1.01	−.06	.05	−.04	−1.29

^*

Note

^***

p < .001