. Author manuscript; available in PMC: 2015 Jul 1.

Published in final edited form as: J Child Psychol Psychiatry. 2014 Jan 24;55(7):811–818. doi: 10.1111/jcpp.12199

Table 2.

Rates of comorbid disorders in groups with and without ADHD and COP

	Control N = 69	ADHD only N = 80	COP only N = 10	COP + ADHD N = 30
Anxiety Disorders					χ²
Specific Phobia	0 (0%)_a	3 (4%)_a	4 (40%)_b	6 (20%)_b	31.5^***
Separation Anxiety Disorder	2 (3%)_a	6 (8%)_a	3 (30%)_b	7 (23%)_b	15.4^**
Generalized Anxiety Disorder	2 (3%)_a	14 (18%)_b	3 (30%)_b	6 (20%)_b	11.3^**
Obsessive Compulsive Disorder	0 (0%)_a	3 (4%)_a	1 (10%)_ab	13 (43%)_b	52.7^***
Mood Disorders
Major Depressive Disorder	1 (1%)_a	12 (15%)_b	2 (20%)_b	6 (20%)_b	10.9^*
Bipolar Disorder	0 (0%)_a	6 (8%)_b	2 (20%)_b	1 (3%)_ab	10.0^*
Disruptive Behavior Disorders
Oppositional Defiant Disorder	3 (4%)_a	40 (50%)_b	2 (20%)_ab	17 (57%)_b	44.6^***
Conduct Disorder	0 (0%)_a	18 (23%)_b	0 (0%)_ac	3 (10%)_c	20.4^***
Other Disorders
Tourette’s Disorder	0 (0%)_a	2 (3%)_a	1 (10%)_ab	10 (33%)_b	40.4^***

Note: If the overall omnibus test was significant planned pairwise comparisons were conducted. Groups with no shared subscripts are significantly different (p < .05).

^***

p < .001;

^**

p < .01;

p < .05