Bipolar II. Combine or keep separate?

Jean Endicott, John Nee, Nancy Andreasen, Paula Clayton, Martin Keller, William Coryell

Research output: Contribution to journalArticlepeer-review

195 Scopus citations


Data on prior course, characteristics of index episode, and familial aggregation of patients with bipolar II disorder is discussed. The data supports the separation of this condition from both bipolar I and recurrent unipolar disorder.

Original languageEnglish (US)
Pages (from-to)17-28
Number of pages12
JournalJournal of Affective Disorders
Issue number1
StatePublished - 1985

Bibliographical note

Funding Information:
Supported in part by New York State Department of Mental Hygiene, NIMH Grant MH123664 and NIMH Grant MH30906. The paper was reviewed by the publications committee of the collaborative depression study and has its endorsement. Reprint requests: Jean Endicott, Ph.D., Research Assessment and Training Unit, New York State Psychiatric Institute, 722 West 168th Street, New York, NY 10032, U.S.A.


  • Bipolar I disorder
  • Bipolar II disorder
  • Recurrent unipolar disorder


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