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Poor sleep in seniors linked to brain changes that may precede Alzheimer's

NCT ID NCT04044495

Knowledge-focused Sponsor: University Hospital, Bordeaux 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 examined whether older adults with disrupted sleep or irregular daily rhythms show early brain changes linked to Alzheimer's disease. Researchers used wrist-worn activity monitors and brain MRI scans in 47 people over 65 without major memory problems. The goal was to see if sleep issues could serve as an early warning sign for cognitive decline.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this study could help identify early warning signs for Alzheimer's disease based on sleep patterns, potentially leading to preventive strategies.
What could go wrong
This is an observational study with only 47 participants, so results may not apply to everyone. It looks for associations, not causes, and cannot prove that sleep changes lead to Alzheimer's.

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

47 people

The number who actually took part.

Started

Sep 2019

Finished

Feb 2022

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: * Belonging to AMImage 2 cohort and preferentially belonging to subjects included in the first actimetric assessment. AMI subjects have been selected based on Mutualité Sociale Agricole of Gironde (agricultural Health Insurance system database as followed : * \>65 years old * Retired from agriculture * Living in Gironde countryside * Being affiliated to the French Farmers Health Insurance * Signed Informed Consent Exclusion Criteria: * Left Handed subjects * Severe dementia (MMSE\<13) * Stroke * Parkinson's disease * MRI contraindication * Health state not allowing displacement to the hospital * Person under gardianship and not able to give its informed consent

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Conditions

The condition(s) this trial relates to.

Alzheimer disease sleep disorder

As listed by the trial registrant

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

Alzheimer disease Sleep

Contacts and locations

Locations

  • CHU de Bordeaux

    Bordeaux, 33 076, France

More trials for these conditions

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