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Abstract
Previous reports have shown that bright light exposure may benefit patients with seasonal
depression. In the present study, the possible therapeutic effect of bright light
in non-seasonal major depressive disorder was examined. Forty-two depressed patients
not receiving additional antidepressant medication were exposed to bright white light
of 2500 lux or dim red light of 50 lux over one week for two hr daily in the morning.
The change in depressive symptoms was assessed by rating scales (Hamilton Depression
Rating Scale, CGI) and by self-rating scales (Depression Scale, Complaint List, Visual
Analgue Scale). Consistent for all ratings, the decrease in depressive symptoms after
bright white light was only slight and not different from dim red-light exposure.
Contrary to the findings in seasonal affective disorder, phototheraphy administered
over one week for two hr daily is not effective in nonseasonal major depressive disorder.
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Article info
Publication history
Received in revised form:
February 27,
1991
Received:
September 2,
1990
Identification
Copyright
© 1991 Published by Elsevier Inc.