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Letters to the Editor
July 1999

Factor Analysis of Mania

Arch Gen Psychiatry. 1999;56(7):671-672. doi:10.1001/archpsyc.56.7.671

Manic episodes, which are mandatory for the diagnosis of bipolar disorder, are traditionally viewed as "mood episodes."1 It has been proposed that variables related to activation level, and not to mood state, constitute the core characteristics of the manic syndrome.2

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