The role of beliefs and attitudes about sleep in seasonal and nonseasonal mood disorder, and nondepressed controls

Abstract Background Unhelpful sleep-related cognitions play an important role in insomnia and major depressive disorder, but their role in seasonal affective disorder has not yet been explored. Therefore, the purpose of this study was to determine if individuals with seasonal affective disorder (SAD...

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Bibliographic Details
Published in:	Journal of affective disorders Vol. 150; no. 2; pp. 466 - 473
Main Authors:	Roecklein, Kathryn A, Carney, Colleen E, Wong, Patricia M, Steiner, Jessica L, Hasler, Brant P, Franzen, Peter L
Format:	Journal Article
Language:	English
Published:	Oxford Elsevier B.V 05-09-2013 Elsevier
Subjects:	Adult Adult and adolescent clinical studies Affective disorders Attitude to Health Attitudes Biological and medical sciences Case-Control Studies Culture Depression Depressive Disorder - physiopathology Depressive Disorder - psychology Disorders of higher nervous function. Focal brain diseases. Central vestibular syndrome and deafness. Brain stem syndromes Fatigue Female Humans Hypersomnia Insomnia Male Medical sciences Mood disorders Nervous system (semeiology, syndromes) Neurology Psychiatry Psychology. Psychoanalysis. Psychiatry Psychopathology. Psychiatry Seasonal affective disorder Seasonal Affective Disorder - physiopathology Seasonal Affective Disorder - psychology Seasonal affective disorders Sleep Sleep - physiology Sleep problems Sleep Wake Disorders - psychology Seasonal affective disorder Fatigue Depression Hypersomnia Sleep Belief Mood disorder Nervous system diseases Attitude Sleep disorder Seasonal variation Sleep wake cycle Neurological disorder
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Summary:	Abstract Background Unhelpful sleep-related cognitions play an important role in insomnia and major depressive disorder, but their role in seasonal affective disorder has not yet been explored. Therefore, the purpose of this study was to determine if individuals with seasonal affective disorder (SAD) have sleep-related cognitions similar to those with primary insomnia, and those with insomnia related to comorbid nonseasonal depression. Methods Participants ( n =147) completed the Dysfunctional Beliefs and Attitudes about Sleep 16-item scale (DBAS-16) and the Structured Interview Guide for the Hamilton Depression Rating Scale, Seasonal Affective Disorder Version (SIGH-SAD), which assesses self reported sleep problems including early, middle, or late insomnia, and hypersomnia in the previous week. All participants were assessed in winter, and during an episode for those with a depressive disorder. Results Individuals with SAD were more likely to report hypersomnia on the SIGH-SAD, as well as a combined presentation of hypersomnia and insomnia on the Pittsburgh Sleep Quality Index (PSQI). The SAD group reported DBAS-16 scores in the range associated with clinical sleep disturbance, and DBAS-16 scores were most strongly associated with reports of early insomnia, suggesting circadian misalignment. Limitations Limitations include the self-report nature of the SIGH-SAD instrument on which insomnia and hypersomnia reports were based. Conclusions Future work could employ sleep- or chronobiological-focused interventions to improve clinical response in SAD.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0165-0327 1573-2517
DOI:	10.1016/j.jad.2013.04.041