Efficacy of enhanced evening light for advanced sleep phase syndrome |
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Authors: | Palmer Christopher R Kripke Daniel F Savage Henry C Cindrich Larry A Loving Richard T Elliott Jeffrey A |
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Affiliation: | a Department of Psychiatry and Sam and Rose Stein Institute for Research on Aging, University of California, San Diego.b Apollo Lighting Systems, Orem, UT. |
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Abstract: | This study tested whether a newly designed enhanced evening light therapy was well tolerated and effective in relieving symptoms of Advanced Sleep Phase Syndrome (ASPS). Participants with self-reported ASPS symptoms were 47 older adults (21 men and 26 women, age 60-86). After baseline, participants underwent 28 consecutive days of either dim or enhanced intensity light treatment for 2-3 hr in the evening. Enhanced evening light (~265 lux) exposure was no more effective than a placebo dim light (~2 lux) at alleviating advanced sleep phase as measured by actigraphically recorded sleep and urinary 6-sulphatoxymelatonin (aMT6s) excretion patterns. Participants receiving the enhanced light reported subjective benefit and a significant delay in sleep onset as compared to the placebo. Although compliance was good and the new enhanced evening light therapy design was well tolerated, the benefits were statistically equivocal. |
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