(for children, a full year) of both hypomanic and depressive periods without ever fulfilling
the criteria for an episode of mani a, hypomania, or major depression.
A large number of substances of abuse, some prescribed medi cations, and several
medical conditions can be associated with manic-like phenomena. This fact is recognized
in the diagnoses of substance/medication-induced bipolar and related disorder and bipo-
lar and related disorder due to another medical condition.
The recognition that many individuals, partic ularly children and, to a lesser extent, ad-
olescents, experience bipolar-like phenomena that  do not meet the criteria for bipolar I, bi-
polar II, or cyclothymic disorder is reflected in the availability of the other specified
bipolar and related disorder category. Indeed, specific criteria for a disorder involving
short-duration hypomania are provided in Section III in the hope of encouraging further
study of this disorder.
Bipolar I Disorder
Diagnostic Criteria
For a diagnosis of bipolar I disorder, it is nece ssary to meet the following criteria for a manic
episode. The manic episode may have been preceded by and may be followed by hypo-
manic or major depressive episodes.