When light therapy is used to treat seasonal affective disorder (SAD), a response should occur within:
a. 2 weeks
b. 4 weeks
c. 3 months
d. 1 year
A
When used for SAD, light therapy relieves symptoms in about 75% of persons. Response should occur within 2 weeks, and neither safety nor efficacy has be established for treatment lasting longer than this. Researchers have evaluated the use of light therapy in a small population of women with nonseasonal depression and reported improvements, indicating that light therapy may have use in treating depression outside of SAD.
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1. 1 2. 1.5 3. 2 4. 3
Olig- means:
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