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Can morning light help Alzheimer's patients sleep better?

NCT ID NCT05837819

Symptom relief Sponsor: Icahn School of Medicine at Mount Sinai Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at whether different lengths of light exposure can improve sleep, mood, and agitation in people with Alzheimer's disease. 135 participants were randomly assigned to receive 2 hours, 4 hours, or all-day morning light. The goal was to see which light schedule works best for reducing sleep problems.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

135 people

The number who actually took part.

Started

Feb 2023

Finished

Jul 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

65 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Diagnosis of Alzheimer's disease or related dementia with a Montreal Cognitive Assessment score \<25 * Sleep disturbance with a Pittsburgh Sleep Quality Index score ≥5 Exclusion Criteria: * Extensive brain vascular disease, traumatic brain injury, multiple sclerosis, Parkinson's Disease * Obstructing cataracts * Severe macular degeneration * Use of sleep medication * Use of oral melatonin * untreated moderate to severe sleep apnea * Severe restless leg syndrome * Blindness

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Conditions

The condition(s) this trial relates to.

Alzheimer disease Parasomnias sleep disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Alzheimer's disease Sleep disturbance

Contacts and locations

Locations

  • Icahn School of Medicine at Mount Sinai

    Albany, New York, 12204, United States

  • Icahn School of Medicine at Mount Sinai

    New York, New York, 10029, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.