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. Author manuscript; available in PMC: 2011 Jul 30.
Published in final edited form as: Psychiatry Res. 2010 May 21;178(2):317–322. doi: 10.1016/j.psychres.2009.11.013

Table 3. Comorbidity rates (%) by diagnostic group.

DIAGNOSIS TD (N=40) OCD (N=206) TD+OCD (N=32) p
Any Anxiety Disorder 7.5% a 40.3% ab 18.2% b 0.000
 Generalized Anxiety 2.5 a 23.2 ab 6.1 b 0.000
 Social Phobia 2.5 12.0 3.0 0.06
 Separation Anxiety 0.0 a 11.6 ab 6.1 b 0.05
 Specific Phobia 0.0 4.3 0.0 0.19
Depression / Dysthymia 2.5 12.1 11.6 0.20
ADHD 35.0 a 12.9 ab 24.2 b 0.001
ODD/CD 17.5 a 5.6 ab 12.1 b 0.02

Note: Means sharing superscripts (a b) are significantly different at the (minimum) p < 0.05 level. χ2 coefficients are present χ2ed in the text. N = Number of participants; ADHD = Attention Deficit Hyperactivity Disorder; ODD = Oppositional Defiant Disorder; CD = Conduct Disorder; OCD = Obsessive-Compulsive Disorder; TD = Tic Disorder