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Conventional Repetitive Transcranial Magnetic Stimulation for Depression: A Step-by-Step Protocol

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Cognitive-behavioral therapy vs. light therapy for preventing winter depression recurrence: study protocol for a

Kelly J Rohan¹, Maggie Evans, Jennifer N Mahon

¹Department of Psychology, University of Vermont, John Dewey Hall, Burlington, VT 05405-0134, USA. kelly.rohan@uvm.edu

|March 22, 2013

Summary

Cognitive-behavioral group therapy (CBT) may offer a more effective long-term solution for preventing seasonal affective disorder (SAD) recurrence than light therapy (LT). This study compared CBT and LT for SAD management, focusing on long-term outcomes.

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Area of Science:

Psychiatry
Clinical Psychology
Public Health

Background:

Seasonal affective disorder (SAD) is a recurrent depressive disorder impacting individuals during fall and winter.
Preventing winter depression recurrence is a major public health challenge for SAD management.
Current treatments like light therapy (LT) have poor long-term compliance, necessitating alternative interventions.

Purpose of the Study:

To test the efficacy of a novel, SAD-tailored cognitive-behavioral group therapy (CBT) against LT.
To compare CBT and LT in preventing depression recurrence in the subsequent winter.
To assess long-term outcomes of SAD treatments beyond acute intervention.

Main Methods:

A randomized clinical trial involving 160 adults with recurrent major depression with seasonal pattern.
Participants were randomized to either CBT or LT for 6 weeks.
Follow-up occurred in the subsequent summer, the next winter, and two winters later to assess long-term outcomes.

Main Results:

The study design is set up to determine if prior CBT exposure is associated with a lower likelihood of depression recurrence compared to LT.
The primary outcome is the difference in depression recurrence in the next winter between the CBT and LT groups.
The study focuses on clinically meaningful differences in long-term outcomes.

Conclusions:

The study design directly addresses whether CBT is superior to LT in preventing SAD recurrence.
The findings aim to inform the development of time-limited treatments with enduring effects for SAD.
The chosen design prioritizes detecting a clinically meaningful difference in long-term recurrence rates.