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Massive study tracks blood clot risks in 21,000 adults

NCT ID NCT00005504

Knowledge-focused Sponsor: University of Minnesota 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study looks at what causes dangerous blood clots in the legs (venous thrombosis) and lungs (pulmonary embolism) in over 21,000 African American and white adults. Researchers are using data from two long-running heart health studies to find patterns and risk factors. The goal is to better understand these conditions, not to test a new treatment.

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

21,680 people

The number who actually took part.

Started

Feb 1998

Expected to finish

Apr 2030

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.

Who is studied

ARIC and CHS cohorts

Ages

45 to 100 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: in the ARIC or CHS cohorts already Exclusion: not in the ARIC or CHS cohorts

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Conditions

The condition(s) this trial relates to.

cardiovascular disorder pulmonary embolism thrombophilia due to thrombin defect venous thromboembolism Venous Thrombosis

As listed by the trial registrant

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

Cardiovascular diseases Pulmonary embolism Venous thrombosis

More trials for these conditions

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