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Light Treatment for Sleep/Wake Disturbances in Alzheimer's Disease

This study has been completed.
Palo Alto Veterans Institute for Research
Information provided by (Responsible Party):
Jerome A Yesavage,, Stanford University Identifier:
First received: July 23, 2009
Last updated: February 9, 2017
Last verified: December 2016
The aim of this study is to demonstrate the efficacy of timed exposure to bright light for the treatment of disturbed nighttime sleep and daytime wake in community-dwelling dementia patients and their caregivers, and to determine if there are genetic relationships between memory problems and sleep problems

Condition Intervention
Sleep Initiation and Maintenance Disorders Device: Bright light Device: Control

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Light Treatment for Sleep/Wake Disturbances in Alzheimer's Disease

Resource links provided by NLM:

Further study details as provided by Jerome A Yesavage,, Stanford University:

Primary Outcome Measures:
  • Total Sleep Time [ Time Frame: 2 weeks ]
    The amount of actual sleep time in a sleep episode.

Secondary Outcome Measures:
  • WASO (Wake After Sleep Onset) [ Time Frame: 2 weeks ]
    WASO (Wake After Sleep Onset): the amount of time test subjects have spent awake after initially falling sleep and before they awaken for good.

Enrollment: 118
Study Start Date: September 2004
Study Completion Date: December 2010
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Bright Light
received bright light
Device: Bright light
Participants uses bright light
Placebo Comparator: Control
received regular light
Device: Control
Participants uses dim light

Detailed Description:
  1. Efficacy: Up to 4 weeks of morning bright light exposure will be more efficacious than morning dim light in consolidating nighttime sleep as assessed by actigraphy.
  2. Predictors of response: We expect the primary predictor of treatment response will be initial MMSE score. Secondary predictors include baseline sleep/wake and circadian parameters and age.
  3. Effectiveness: Bright light treatment will be more effective than dim light in improving quality of life.
  4. An understanding of some of the genetic markers of memory and/or sleep problems.

Ages Eligible for Study:   55 Years to 100 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:Alzheimer's Disease Patients:

  • Stanford Alzheimer's Disease Core Center member or potential member, with diagnostic criteria met for probable AD, living with caregiver willing to participate in the protocol
  • Non-institutionalized


-- Living in home of AD patient and willing to participate in protocol

Exclusion Criteria:Alzheimer's Disease Patients:

  • History of manic or bipolar disorder
  • Prior bright light treatment
  • Irregular or non-24 hour sleep/wake cycle
  • Positive result on multi-staged RLS/PLMD
  • Medical/Ophthalmologic Exclusions
  • RDI >20 on overnight EdenTrace® recording


  • History of manic or bipolar disorder
  • Medical/Ophthalmologic Exclusions
  Contacts and Locations
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Please refer to this study by its identifier: NCT00946530

United States, California
VA Palo Alto Health Care System
Palo Alto, California, United States, 94304
Sponsors and Collaborators
Stanford University
Palo Alto Veterans Institute for Research
Principal Investigator: Jerome A Yesavage Stanford University
  More Information

Responsible Party: Jerome A Yesavage,, Professor of Psychiatry, Stanford University Identifier: NCT00946530     History of Changes
Other Study ID Numbers: SU-06302009-2840
1677 ( Other Identifier: Stanford University IRB )
Study First Received: July 23, 2009
Results First Received: December 5, 2013
Last Updated: February 9, 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No
Plan Description: This was not required at the time.

Additional relevant MeSH terms:
Alzheimer Disease
Sleep Initiation and Maintenance Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders
Sleep Disorders, Intrinsic
Sleep Wake Disorders processed this record on September 20, 2017