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Seasonal affective disorder is a mood disorder in which symptoms of depression
occur mostly in the winter months. The episodes of depression may be atypical. Bright
light therapy: - reduces the severity of depressive symptoms more than
placebo for seasonal affective disorder
- reduces the severity of depressive
symptoms more than placebo for non-seasonal depression. However bright light therapy
as an adjunct to standard pharmacotherapy does not differ from placebo for non-seasonal
depression
Dawn stimulation: - reduces symptom severity
for seasonal effective disorder
Reference: - Golden
RN et al. The efficacy of light therapy in the treatment of mood disorders: a
review and meta-analysis of the evidence. Am J Psychiatry 2005; 162: 656-62.
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