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Dementia study reveals hidden cases in norway

NCT ID NCT04289389

Knowledge-focused Sponsor: Norwegian Centre for Ageing and Health 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This completed study looked at over 11,000 adults in Trøndelag, Norway, to find out how many people have dementia and how many are undiagnosed. Researchers used standard tests to measure memory and thinking skills. The goal is to get a clearer picture of dementia rates across Norway and identify who is most likely to miss a diagnosis.

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 provide accurate estimates of dementia rates in Norway and highlight gaps in diagnosis, helping to improve healthcare planning.
What could go wrong
This is an observational study, not a treatment trial. It cannot test any new therapy or intervention, so it will not directly change patient care.

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.

Participants

11,675 people

The number who actually took part.

Started

Jan 2018

Finished

Apr 2026

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.

Who is studied

Persons of 70 years of age or older participated in HUNT4 and accepted cognitive screening in HUNT4 70+.

Ages

70 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Living in the designated area Exclusion Criteria: * None

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Conditions

The condition(s) this trial relates to.

Alzheimer disease dementia

As listed by the trial registrant

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

Dementia

Contacts and locations

Locations

  • Norwegian National Advisory Unit on Ageing and Health

    Tønsberg, Norway

More trials for these conditions

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