. Author manuscript; available in PMC: 2015 Jan 26.

Published in final edited form as: J Child Adolesc Subst Abuse. 2014 Nov 10;24(1):37–45. doi: 10.1080/1067828X.2012.756442

Table 1.

Demographics of the Study groups

	ADHD- externalizers^a	ADHD-only	Comparison	χ² or F	p
	(n=90)	(n=29)	(n=93)	(df=2)
Male, %	80	86.2	68.8	5.07	.08
Caucasian, %	91.1	96.6	97.8	4.43	.11
Inattention (BASC), Time 1	63.5 (9.2)^b	61.4 (8.8)^c	46.5 (9.0)^bc	85.78	<.001
Mean Age, Time 4	18.4 (1.1)	18.1 (0.9)	18.3 (1.2)	0.62	.54
Mean Age, Time 5	20.5 (1.5)	19.9 (1.5)	19.9 (1.5)	2.85	.12
Mean Age, Time 6	22.0 (1.3)	21.5 (1.1)	21.9 (1.3)	1.04	.36
Did Not Complete HS, %	11.9	6.9	4.3	1.91	.15
Childhood Stimulant Medication Use, %	53.1	30.8	-	3.93	.047
Current Stimulant Medication Use at T4, %	36.7	17.2	-	3.81	.051

Note.

Conduct Disorder diagnosis, 11.1%; Oppositional Defiant Disorder diagnosis, 88.9%.

^b,c

Significant post hoc comparison pairs at p < .001 with Bonferroni corrections.