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. Author manuscript; available in PMC: 2013 May 1.
Published in final edited form as: Compr Psychiatry. 2011 Jun 21;53(4):379–386. doi: 10.1016/j.comppsych.2011.05.003

Table 2.

Subtypes of ADHD and comorbidities associated with ADHD by age

ADHD subtypes
 Ages 6-12 N=119
 Ages 13-26 N=37
 X2
 P value
N
 %
 N
 %
  
  
Combined 80 67.2 20 54.1 2.13 0.15
Inattentive 35 29.4 14 37.8 0.03 0.34
Hyperactive
 5
 4.2
 2
 5.4
 0.10
 0.76
Any disruptive behavior disorder
 45
 38.5
 6
 16.2
 6.28
 0.01
Any mood disorder
 12
 10.3
 3
 8.1
 0.15
 0.70
Any anxiety disorder
 66
 56.4
 19
 52.8
 0.15
 0.70
Any tic disorder
 25
 21.4
 12
 32.4
 0.84
 0.36
No comorbidities 21 18.0 9 24.3 0.73 0.39

Note: ADHD = attention deficit hyperactivity disorder.