Objective: The purpose of this study was to examine the rate of attent
ion deficit hyperactivity disorder in adolescents with bipolar disorde
r and to explore the potential effects of comorbid attention deficit h
yperactivity disorder on the phenomenology of adolescent bipolar disor
der. Method: The authors assessed the rate of attention deficit hypera
ctivity disorder for adolescents with bipolar disorder who were hospit
alized for treatment of acute mania or hypomania. Results: Eight (57%)
of 14 adolescent bipolar patients also met DSM-III-R criteria for att
ention deficit hyperactivity disorder. Patients with both disorders we
re more likely to be male and Caucasian and to have mixed rather than
manic bipolar disorder. Patients with attention deficit hyperactivity
disorder had a higher mean total score on the Young Mania Rating Scale
than patients with bipolar disorder alone. Conclusions: Although prel
iminary, these findings may have important implications regarding the
potential relationship between bipolar disorder and attention deficit
hyperactivity disorder.