. Author manuscript; available in PMC: 2009 Oct 7.

Published in final edited form as: J Abnorm Child Psychol. 2002 Jun;30(3):199–216. doi: 10.1023/a:1015183927979

Table II.

Predicting Initiation of Substance Use by the Sixth Grade From Demographic Variables

Step	Variable	Standardized β	Odds ratio	95% CI	p level
1.	Age	0.02	1.06	0.56–1.97	.85
	Gender	0.20	2.04	1.14–3.72	.02
	Race	0.27	2.64	1.21–5.88	.02
	SES	−0.08	0.99	0.97–1.01	.38
	Site 0 vs. 1^a	0.18	1.56	0.95–2.55	.08
	Site 0 vs. 2	−0.02	0.94	0.51–1.66	.84
	Site 0 vs. 3	0.04	1.10	0.56–2.12	.78
	Omnibus model χ²(7, N = 295) = 20.53, p < .005

Note. Because of the varying sample sizes between models, all χ² change figures were calculated by estimating the differences between omnibus model χ²s using the smallest possible sample size.

0 = Durham, 1 = Nashville, 2 = Washington, 3 = Pennsylvania; site was analyzed as a categorical variable with three degrees of freedom.