. Author manuscript; available in PMC: 2013 Jul 1.

Published in final edited form as: Addict Behav. 2012 Mar 13;37(7):875–879. doi: 10.1016/j.addbeh.2012.03.007

Table 1.

Concurrent Incremental Validity.

Model	R²	R²_adj	Δ R²	ANOVA	df	P =
Alcohol Use, 3 Months before Incarceration^a
1) Age, Race, Friend	.050	.022 .	050	F = 1.81	5, 174	.113
Use, Friend Arrested, Age of 1^st Alcohol Use
2) DAS-General:	.101	.064	.052	F = 2.76	7, 172	.01
Stealing/Generalized				F_ch = 4.93	2, 172	.008
Delinquency, Predatory Aggression
Alcohol Use, 3 Months before Incarceration^a
1) Age, Race, Friend	.050	.022 .	050	F = 1.81	5, 174	.113
Use, Friend Arrested, Age of 1^st Alcohol Use
2) DAS-Alcohol:	.364	.338	314	F = 14.06	7, 172	<.001
Stealing/Impulsive				F_ch = 42.51	2, 172	<.001
Delinquency, Predatory Aggression
Marijuana Use, 3 Months before Incarceration^a
1) Age, Race, Friend	.074	.047	.074	F = 2.78	5, 174	.019
Use, Friend Arrested, Age of 1^st Marijuana Use
2) DAS-General:	.088	.051	.014	F = 2.38	7, 172	.024
Stealing/Generalized				F_ch = 1.36	2, 172	.260
Delinquency, Predatory Aggression
Marijuana Use, 3 Months before Incarceration^a
1) Age, Race, Friend	.074	.047	.074	F = 2.78	5, 174	.019
Use, Friend Arrested, Age of 1^st Marijuana Use
2) DAS-Marijuana:	.176	.142	.102	F = 5.24	7, 172	< .001
Stealing/Generalized				F_ch = 10.61	2, 172	<.001
Delinquency, Drug
Dealing & Aggressive
Behavior

N = 180