151. A controlled trial of the Litebook light-emitting diode (LED) light therapy device for treatment of Seasonal Affective Disorder (SAD)
- Author
-
Martine J. Ruiter, Hani Iskandar, Edwin M. Tam, Erin E. Michalak, John I. Telner, Ybe Meesters, Edward Horn, Paul H. Desan, Diane B. Boivin, Andrea J. Weinstein, Raymond W. Lam, and Faculteit Medische Wetenschappen/UMCG
- Subjects
Adult ,Male ,WINTER DEPRESSION ,MECHANISM ,Light therapy ,BRIGHT LIGHT ,MELATONIN ,medicine.medical_specialty ,Randomization ,Adolescent ,PHOTORECEPTOR ,lcsh:RC435-571 ,medicine.medical_treatment ,Seasonal affective disorder (SAD) ,Placebo ,Severity of Illness Index ,FLUOXETINE ,behavioral disciplines and activities ,law.invention ,03 medical and health sciences ,0302 clinical medicine ,Double-Blind Method ,Randomized controlled trial ,law ,lcsh:Psychiatry ,mental disorders ,medicine ,Circadian rhythm ,Aged ,SUPPRESSION ,Seasonal Affective Disorder ,Repeated measures design ,HUMANS ,Middle Aged ,Phototherapy ,EFFICACY ,medicine.disease ,030227 psychiatry ,3. Good health ,ACTION SPECTRUM ,Exact test ,Psychiatry and Mental health ,Treatment Outcome ,Physical therapy ,Female ,Psychology ,030217 neurology & neurosurgery ,Research Article ,Clinical psychology - Abstract
Background Recent research has emphasized that the human circadian rhythm system is differentially sensitive to short wavelength light. Light treatment devices using efficient light-emitting diodes (LEDs) whose output is relatively concentrated in short wavelengths may enable a more convenient effective therapy for Seasonal Affective Disorder (SAD). Methods The efficacy of a LED light therapy device in the treatment of SAD was tested in a randomized, double-blind, placebo-controlled, multi-center trial. Participants aged 18 to 65 with SAD (DSM-IV major depression with seasonal pattern) were seen at Baseline and Randomization visits separated by 1 week, and after 1, 2, 3 and 4 weeks of treatment. Hamilton Depression Rating Scale scores (SIGH-SAD) were obtained at each visit. Participants with SIGH-SAD of 20 or greater at Baseline and Randomization visits were randomized to active or control treatment: exposure to the Litebook LED treatment device (The Litebook Company Ltd., Alberta, Canada) which delivers 1,350 lux white light (with spectral emission peaks at 464 nm and 564 nm) at a distance of 20 inches or to an inactivated negative ion generator at a distance of 20 inches, for 30 minutes a day upon awakening and prior to 8 A.M. Results Of the 26 participants randomized, 23 completed the trial. Mean group SIGH-SAD scores did not differ significantly at randomization. At trial end, the proportions of participants in remission (SIGH-SAD less than 9) were significantly greater (Fisher's exact test), and SIGH-SAD scores, as percent individual score at randomization, were significantly lower (t-test), with active treatment than with control, both in an intent-to-treat analysis and an observed cases analysis. A longitudinal repeated measures ANOVA analysis of SIGH-SAD scores also indicated a significant interaction of time and treatment, showing superiority of the Litebook over the placebo condition. Conclusion The results of this pilot study support the hypothesis that light therapy with the Litebook is an effective treatment for SAD. Trial registration Clinicaltrials.gov: NCT00139997
- Full Text
- View/download PDF