Table 3.

Sources of alcohol use among the entire sample of alcohol users and consistent alcohol users over time.

		Alcohol Users				Consistent Alcohol Users
Source		Slope	SE	F-value	p-value	Slope	SE	F-value	p-value
Parents
	Time	−0.191	0.052	13.62	<0.001**	−0.277	0.616	20.13	<0.001**
	Treatment	0.010	0.129	0.01	0.941	−0.054	0.198	0.07	0.789
	Gender	0.088	0.090	0.97	0.326	0.104	0.115	0.82	0.366
	Ethnicity	−0.045	0.129	0.12	0.735	−0.303	0.183	2.73	0.099
Friend’s Parent
	Time	−0.120	0.160	0.52	0.470	−0.052	0.622	0.08	0.780
	Treatment	−0.399	0.360	1.23	0.280	−0.336	0.185	0.56	0.463
	Gender	0.699	0.330	4.60	0.032	1.100	0.449	5.81	0.016**
	Ethnicity	0.129	0.395	0.11	0.750	−0.007	0.521	0.00	0.988
Another adult> 21yr
	Time	0.197	0.058	11.60	<0.001**	0.194	0.076	6.49	0.011**
	Treatment	0.106	0.123	0.74	0.398	0.138	0.157	0.77	0.392
	Gender	−0.142	0.117	1.47	0.225	−0.138	0.151	0.84	0.361
	Ethnicity	−0.272	0.175	2.42	0.120	−0.390	0.239	2.65	0.104
Someone< 21yr
	Time	0.190	0.072	7.06	0.008**	0.169	0.088	3.68	0.056
	Treatment	−0.096	0.186	0.27	0.610	0.009	0.205	0.00	0.965
	Gender	−0.140	0.147	0.90	0.344	−0.124	0.179	0.48	0.490
	Ethnicity	0.006	0.217	0.00	0.977	0.072	0.247	0.09	0.769
Took it from Home
	Time	0.366	0.099	13.62	<0.001**	0.431	0.128	11.32	<0.001**
	Treatment	−0.076	0.272	0.08	0.784	−0.328	0.297	1.22	0.283
	Gender	−0.111	0.211	0.28	0.597	−0.284	0.253	1.26	0.263
	Ethnicity	0.354	0.272	1.70	0.193	0.660	0.294	5.03	0.025**
Took it from Friend’s Home
	Time	0.195	0.147	1.75	0.186	0.247	0.184	1.79	0.181
	Treatment	0.154	0.339	0.21	0.654	0.248	0.383	0.042	0.526
	Gender	0.141	0.308	0.21	0.648	−0.157	0.367	0.18	0.669
	Ethnicity	0.443	0.358	1.53	0.216	0.452	0.426	1.13	0.289
Commercial
	Time	0.865	0.306	11.28	<0.001**	1.210	0.492	5.64	0.018**
	Treatment	0.648	0.510	1.60	0.218	0.603	0.471	1.64	0.215
	Gender	2.261	0.970	5.44	0.020**	2.320	1.681	1.91	0.168
	Ethnicity	−0.978	1.145	0.73	0.393	1.250	1.340	0.87	0.351
	Time*gender	−0.699	0.350	3.96	0.047	−0.076	0.551	1.92	0.166
	Time*ethnic	0.487	0.403	1.43	0.233	−0.259	0.485	0.29	0.593

Source: Project Northland Chicago, Chicago, Illinois, 2002–2005

^**p < .025

We explore social versus commercial access to alcohol by young teens in a diverse, urban environment. Social sources dominated all years for alcohol users (n=1328) and consistent users (n=329).