Depression Clinical Trial
Official title:
Cognitive Behavioral Approaches to Seasonal Depression
This study will assess the effectiveness of cognitive behavioral therapy (CBT) in treating seasonal affective disorder (SAD), commonly called the "winter blues."
SAD is a condition in which people experience depression as a result of seasonal variations
in sunlight. Although light therapy is a common treatment for SAD, a large proportion of
people with SAD are resistant to this treatment. CBT is effective for nonseasonal depressive
disorders, but its use for SAD has not been thoroughly explored. This study will determine
whether CBT, alone and combined with light therapy, is as effective as light therapy alone
in reducing SAD symptoms.
Participants in this study will be randomly assigned to light therapy, CBT, a combination of
light therapy and CBT, or a control group (no therapy) for 6 weeks. CBT will be conducted
twice a week; light therapy will be conducted twice a day. Assessments will be made before,
during, and after the study treatment. Depression scales, questionnaires, and behavioral
tasks will be used to assess the depressive symptoms of participants. A 6-month and 1-year
follow-up visit will also be conducted. During the follow-up visits, participants will be
interviewed and will complete a questionnaire and a survey.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind, Primary Purpose: Treatment
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