Bipolar disorder rates are similar in males and females.
=== Comorbid conditions ===People with bipolar disorder often have other co-existing psychiatric conditions such as anxiety (present in about 71% of people with bipolar disorder), substance abuse (56%), personality disorders (36%) and attention deficit hyperactivity disorder (1020%) which can add to the burden of illness and worsen the prognosis
 A more recent analysis of data from a second US National Comorbidity Survey found that 1% met lifetime prevalence criteria for bipolar I, 1

