ADHD and Comorbidity in Childhood
J Clin Psychiatry 2006;67(suppl 8):27-31
© Copyright 2014 Physicians Postgraduate Press, Inc.
In recent years, evidence has been accumulating regarding high levels of comorbidity between
attention-deficit/hyperactivity disorder (ADHD) and a number of disorders, including mood and anxiety
disorders and conduct disorder. Thus, ADHD is most likely a group of conditions, rather than a
single homogeneous clinical entity, with potentially different etiologic and modifying risk factors and
different outcomes. Follow-up studies of children with ADHD indicate that subgroups of subjects
with ADHD and comorbid disorders have a poorer outcome as evidenced by significantly greater social,
emotional, and psychological difficulties. Investigation of these issues should help to clarify the
etiology, course, and outcome of ADHD.