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- Title
Dim versus bright red (light-emitting diode) light in the treatment of seasonal affective disorder.
- Authors
Levitt, A. J.; Joffe, R. T.; King, E.
- Abstract
Forty-three subjects with seasonal affective disorder were randomly assigned to receive 2 weeks of treatment with either bright- (mean 4106 lx) or dim-light (mean 96 lx) therapy, using red light-emitting diode light sources, in a head-mounted unit. Defining response as a 50% reduction in the 21-item Hamilton Depression Rating Scale score to a post-treatment score of less than 8, there was no significant difference in response rate between patients receiving bright light (67%) as compared with patients receiving dim light (68%). Possible explanations for the similar response rate to 2 very different illuminances of red light are discussed.
- Publication
Acta Psychiatrica Scandinavica, 1994, Vol 89, Issue 5, p341
- ISSN
0001-690X
- Publication type
Article
- DOI
10.1111/j.1600-0447.1994.tb01526.x