Diagnostic assessment

Timo Partonen and Norman E. Rosenthal

in Seasonal Affective Disorder

Second edition

Published on behalf of Oxford University Press

Published in print October 2009 | ISBN: 9780199544288
Published online February 2013 | e-ISBN: 9780191754593 | DOI:
Diagnostic assessment

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Winter SAD constitutes a group of patients with more atypical than classical symptoms of depression. The course of illness is characterized by recurrent depressive episodes that coincide with reduced hours of daylight during the winter season and disappear in summer. Since special investigations at present are uninformative, the diagnosis of winter SAD is based on the patient's history and report. Comorbid conditions influence the clinical picture of winter SAD by modulating the course of illness and make the diagnosis of winter SAD more difficult, particularly in patients presenting with non-specific complaints such as lack of energy, pain, and fatigue during the winter months.

Chapter.  3492 words. 

Subjects: Psychiatry

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