Light Therapy for PD - Dose Selection
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ClinicalTrials.gov Identifier: NCT04291014 |
Recruitment Status :
Active, not recruiting
First Posted : March 2, 2020
Last Update Posted : December 14, 2022
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Parkinson Disease Sleep Disorder Fatigue | Device: SunRay Light Boxes | Not Applicable |
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 144 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Intervention Model Description: | This is a 16-week, randomized, phase II, parallel-group, dose-selection clinical trial of LT in participants with PD and co-existing sleep disruption using a comparative selection trial design. |
Masking: | Single (Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Dose Selection Trial of Light Therapy for Impaired Sleep in Parkinson's Disease |
Actual Study Start Date : | September 11, 2020 |
Actual Primary Completion Date : | November 12, 2022 |
Estimated Study Completion Date : | April 2023 |

Arm | Intervention/treatment |
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Experimental: BWLT once daily
Participants in this arm will receive bright white light therapy daily once a day (in the evening)
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Device: SunRay Light Boxes
SunRay light boxes will be used to administer the light therapy. |
Experimental: BWLT twice daily
Participants in this arm will receive bright white light therapy daily twice a day (morning and evening).
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Device: SunRay Light Boxes
SunRay light boxes will be used to administer the light therapy. |
Experimental: BWLT weekly
Participants in this arm will receive bright white light therapy once weekly (in the evening).
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Device: SunRay Light Boxes
SunRay light boxes will be used to administer the light therapy. |
Experimental: DRLT twice daily
Participants in this arm will receive dim red light twice daily (morning and evening).
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Device: SunRay Light Boxes
SunRay light boxes will be used to administer the light therapy. |
- PDSS-2 [ Time Frame: 8 weeks ]The PDSS-2 is a 15-question instrument designed to simultaneously capture the multidimensional aspects of sleep-related problems and changes in sleep quality.
- PFS-16 [ Time Frame: 8 weeks ]The PFS-16 is a patient-rated scale that measures fatigue. The scale allows the measurements of the presence of fatigue (seven items) and its impact on daily function (nine items).

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 45 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Diagnosis of idiopathic PD as defined by the Movement Disorder Society Clinical Diagnostic Criteria for Parkinson's disease;
- PD Hoehn and Yahr stage 2-4;
- A score of 2 (mild) or above on the Sleep Problems question of the MDS-UPDRS Part 1;
- Stable dose of all PD medications for at least 30 days prior to randomization;
- Willingness to wear an Actiwatch and complete daily sleep logs;
- Age 45 or above
Exclusion Criteria:
- Atypical or secondary forms of parkinsonism;
- Co-existent significant sleep apnea at screening, as determined by the PI's clinical assessment; adequately treated sleep apnea, as assessed by sleep apnea machine download (CPAP download) will be permitted;
- Co-existent symptomatic restless legs syndrome (RLS) (as assessed by the International Classification of Sleep Disorders (ICDS) diagnostic criteria for RLS) at screening;
- Cognitive impairment as determined by a Mini Mental State Examination score <25 at screening;
- Presence of moderate depression defined as a Beck Depression Inventory II (BDI-II) score ≥20 at screening;
- Current untreated hallucinations or psychosis (drug-induced or spontaneous) with a score of 2 or above on the Hallucinations and Psychosis question of the MDS-UPDRS Part 2;
- Use of hypno-sedative drugs for sleep or stimulants, unless the participant has been on a stable dose for at least 60 days prior to the screening;
- Ongoing or recent (within 30 days prior to screening) Cognitive Behavioral Therapy for Insomnia;
- Use of antidepressants, unless the participant has been on a stable dose for at least 60 days prior to the screening;
- Work hours between 10 PM and 6 AM, within 60 days prior to randomization or anticipated during the 16 weeks after screening;
- Travel between 3 or more time zones within 45 days prior to study screening or anticipated such travel during the 16 weeks after screening;
- Unstable or serious medical illness;
- History of significant eye trauma or disease, retinopathy, or cataract Grade 4 that would significantly affect transmission or processing of light through either eye;
- Current use, use at any time during study participation, or use within the 30 days prior to screening of photosensitizing or other medications that in the opinion of the investigator would interfere with the safety of the participant during the trial, including: amiodarone, porfimer, psoralens, chlorpromazine, quinidine, demeclocycline, temoporfin, tetracycline, fleroxacin, oral isoretinoin, voriconazole, nalidixic acid, thioridazine, St. John's wort, ofloxacin, and piroxicam;
- Pregnant women will be excluded from participation; if a participant is pre-menopausal, a urine pregnancy test will be conducted at randomization to determine eligibility.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04291014

Responsible Party: | Aleksandar Videnovic, MD, Associate Professor of Neurology, Massachusetts General Hospital |
ClinicalTrials.gov Identifier: | NCT04291014 |
Other Study ID Numbers: |
NN110 1U01NS114001 |
First Posted: | March 2, 2020 Key Record Dates |
Last Update Posted: | December 14, 2022 |
Last Verified: | December 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Plan Description: | This trial will follow the NINDS policy for data sharing. |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Parkinson Disease Light therapy |
Parkinson Disease Sleep Wake Disorders Parkinsonian Disorders Basal Ganglia Diseases Brain Diseases Central Nervous System Diseases |
Nervous System Diseases Movement Disorders Synucleinopathies Neurodegenerative Diseases Neurologic Manifestations Mental Disorders |