. Author manuscript; available in PMC: 2011 Jan 1.

Published in final edited form as: J Subst Use. 2010 Jan 1;15(5):352–366. doi: 10.3109/14659890903531279

Table 2.

Outcomes over time using generalized estimating equation (GEE) models

	Continuous Measures		Dichotomous Measures
Demographic	Days Worked	ASI Legal	ASI Employment	Peak density	Abstinence	Arrests

	Coef (s.e.)	Coef (s.e.)	Coef (s.e.)	Coef. (s.e.)	OR_adj (95% CI)	OR_adj (95% CI)

Interview
Baseline (ref)	---	---	---	---	---	---
6-month	7.98(8.27)	−0.04(0.02)^a	−0.10(0.03) ^c	−15.54(1.75) ^c	16.45(6.61–40.90)^c	0.17(0.06–0.49)^b
12-month	31.31(8.66)^c	−0.06(0.02)^a	−0.16(0.03) ^c	−15.54(1.85) ^c	15.05(5.88–38.50)^c	0.04(0.01–0.28) ^b
18-month	39.14(8.65)^c	−0.04(0.02)	−0.17(0.03) ^c	−10.71(1.84) ^c	6.52(2.60–16.44)^c	0.12(0.03–0.44) ^b

Note: Days Worked, Peak Density, Abstinence and Arrests assess the past 6 months. ASI variables measure past 30 days. Analyses controlled for age, race, and education.

p<.05;

p<.01;

p<.001