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Digital nudge: could a letter save your heart?

NCT ID NCT07382414

Knowledge-focused Sponsor: Tor Biering-Sørensen 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 09, 2026 · Updated 2 times

Summary

This study tests whether sending an electronic letter to people with heart disease and high cholesterol encourages them to get their cholesterol checked. Researchers will compare those who receive the letter to those who don't, using national health records to track results. The goal is to see if a simple reminder can improve heart health monitoring.

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

About 123,000 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Sep 2026

An estimate. Start dates often move.

Expected to finish

Sep 2031

An estimate. End dates often move.

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

18 to 85 years

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 (primary study population) * Alive and resident in Denmark on the identification date * Diagnosis of IHD defined as an A (action) diagnosis code of I20-I25 in the Danish National Patient Register, first registered \> 6 months prior to the identification date but after January 1, 2000 * Latest available LDL-C is over 1.4 mmol/l measured up to 3 years prior to the identification date, defined using NPU codes NPU01568, NPU10171 or DNK35308 from the Danish National Laboratory Register * Age \>= 18 years and \<= 85 years on the identification date Exclusion criteria * Nursing home residents * Exemption from, and thus no access to, Digital Post Definition of the elevated Lp(a) subgroup (secondary study population) Participants in the primary study population who, in addition, have an elevated Lp(a) level recorded at any time prior to the identification date, identified in the Danish National Laboratory Register using NPU codes NPU21687 or NPU19840. Elevated Lp(a) is defined as \>= 105 nmol/L or \>= 50 mg/dL. Only participants in this subgroup undergo the second randomization to the Lp(a) letter.

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Conditions

The condition(s) this trial relates to.

coronary artery disorder Hypercholesterolemia hyperlipidemia myocardial ischemia

As listed by the trial registrant

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

Coronary artery disease Hypercholesterolemia Ischemic heart disease Lipoprotein(A) Secondary prevention

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Center for Translational Cardiology and Pragmatic Randomized Trials, Department of Cardiology, Copenhagen University Hospital - Herlev and Gentofte, Hellerup, 2900

    Hellerup, Region Sjælland, 2900, Denmark

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