Table 4.

Multiple regression predicting change in BAC from entrance to exit (entry BAC, demographics, group characteristics, drug use, transportation method).

N = 1414	Step 1				Step 2				Step 3				Step 4				Step 5
	B	SE	β	t	B	SE	β	t	B	SE	β	t	B	SE	β	t	B	SE	β	t
(Constant)	2.79	.13		21.7**	3.40	.63		5.43**	3.08	.71		4.35**	2.98	.71		4.20**	0.46	.73		0.64
Entry BAC	0.87	.02	.69	35.6**	0.86	.03	.68	34.01**	0.84	.03	.67	33.04**	0.84	.03	.66	32.62**	0.78	.03	.62	30.89**
Age					0.01	.02	.01	0.39	0.01	.02	.02	0.65	0.01	.02	.01	0.59	0.03	.02	.05	1.94
Gender (female referent)					−0.28	.21	−.03	−1.35	−0.35	.21	−.03	−1.64	−0.38	.21	−.04	−1.76	−0.25	.21	−.02	−1.20
Sexual orientation (heterosexual referent)					0.40	.23	.03	1.74	0.38	.23	.03	1.63	0.38	.23	.03	1.61	0.31	.23	.03	1.36
Race (White referent)					−0.24	.25	−.02	−0.96	−0.12	.25	−.01	−0.48	−0.12	.25	−.01	−0.48	−0.11	.24	−.01	−0.45
Ethnicity (hispanic referent)					−0.41	.27	−.03	−1.53	−0.41	.27	−.03	−1.54	−0.41	.27	−.03	−1.52	−0.36	.26	−.03	−1.38
Student status (Non-student referent)					−0.42	.25	−.04	−1.66	−0.42	.25	−.04	−1.65	−0.39	.25	−.04	−1.55	−0.23	.24	−.02	−1.38
Employment status (full-time referent)					−0.13	.26	−.01	−0.51	−0.14	.26	−.01	−0.55	−0.15	.26	−.01	−0.58	−0.16	.25	−.02	−0.65
Education level (less than college referent)					0.15	.23	.01	0.65	0.12	.23	.01	0.51	0.16	.23	.02	0.68	0.10	.22	.01	0.45
Income					.00	.01	.00	−0.05	0.00	.01	.00	0.07	0.00	.01	.00	.12	0.00	.01	.01	0.46
Marital status (single referent)					−0.36	.28	−.03	−1.31	−0.36	.28	−.03	−1.30	−0.34	.28	−.03	−1.23	−0.25	.27	−.02	−0.94
Relationship status (no relationship referent)					−0.26	.24	−.02	−1.09	−0.27	.24	−.02	−1.13	−0.24	.24	−.02	−1.01	−0.32	.22	−0.03	−1.39
Size of social group									0.05	.07	.01	0.71	0.05	.07	.01	0.72	0.02	.07	.00	0.20
Concern about group safety									−0.07	.21	−.01	−0.32	−0.06	.21	−.01	−0.29	0.04	.21	.00	0.20
Someone takes responsibility for safety (yes referent)									−0.40	.24	−.03	−1.69	−0.39	.24	−.03	−1.63	−0.20	.23	−.02	−0.85
Frequently drunk group member (no referent)									0.63	.18	.07	3.46**	0.63	.18	.07	3.45**	0.55	.18	.06	3.10**
Drug use													.34	.24	.03	1.42	0.25	.23	.02	1.07
Passenger																	2.45	0.25	.22	9.91**
Non-private transportation method																	2.69	.35	.18	7.66**
	R2 = .47,				R2 = .48, ΔR2 = .01,				R2 = .49, ΔR2 = .01,				R2 = .49, ΔR2 = .00				R2 = .52, ΔR2 = .04
	F(1,1409) = 1267.2**				F(11,1398) = 107.3				F(4,1394) = 82.2**				F(1,1391) = 77.5				F(2,1391) = 80.1**

^*p < .05.

^**p< .01.