Epidemiology of Venous Thrombosis and Pulmonary Embolism (LITE)

November 15, 2023 updated by: University of Minnesota

Longitudinal Investigation of Thromboembolism Etiology

To investigate venous thromboembolism in two carefully conducted prospective epidemiologic studies of African American and white adults -- the Atherosclerosis Risk in Communities (ARIC) Study and the Cardiovascular Health Study (CHS).

Study Overview

Status

Active, not recruiting

Conditions

Detailed Description

BACKGROUND:

Venous thromboembolism, comprising deep venous thrombosis (DVT) and pulmonary embolism (PE), is a major contributor to morbidity and mortality in the United States. Nevertheless, no comprehensive, prospective, population-based epidemiologic studies have simultaneously examined lifestyle, molecular, and biochemical risk factors for this important disease.

DESIGN NARRATIVE:

Deep venous thrombosis and pulmonary embolism cases were identified and verified in order to estimate incident rates of hospitalized venous thromboembolism in the combined ARIC and CHS cohorts. The association of venous thromboembolism was determined prospectively with demographic and lifestyle factors, plasma lipids, medical history, and hemostatic components (including fibrinogen, platelet count, factors VIIc and VIIIc) using existing ARIC and CHS data. A nested case control study was conducted using stored pre-diagnosis blood and DNA specimens to determine the prospective associations of venous thromboembolism with the following: levels of procoagulant or anticoagulant factors and related genetic variants (including factor V Leiden), fibrinolytic factors (e.g., plasminogen activator inhibitor-1) and related genetic variants, markers of thrombin activation, and other potentially important biochemical or related genetic factors (e.g., homocysteine).

The study was renewed in 2003 to extend event follow-up for four more years and to conduct longitudinal analyses of incidence and potential risk factors not fully explored such as diet, frailty, hormone replace therapy and obesity interactions. It was renewed in 2008 to conduct a genome wide association study. It was again renewed in 2013 and 2017.

Study Type

Observational

Enrollment (Actual)

21680

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

45 years to 100 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Probability Sample

Study Population

ARIC and CHS cohorts

Description

Inclusion: in the ARIC or CHS cohorts already

Exclusion: not in the ARIC or CHS cohorts

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Venous thrombosis and pulmonary embolism
Time Frame: Yearly Follow up
venous thrombosis and pulmonary embolism
Yearly Follow up

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Minnesota

Collaborators

National Heart, Lung, and Blood Institute (NHLBI)

Investigators

  • Principal Investigator: Aaron Folsom, MD, MPH, University of Minnesota

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 1, 1998

Primary Completion (Estimated)

April 1, 2030

Study Completion (Estimated)

April 1, 2030

Study Registration Dates

First Submitted

May 25, 2000

First Submitted That Met QC Criteria

May 25, 2000

First Posted (Estimated)

May 26, 2000

Study Record Updates

Last Update Posted (Estimated)

November 17, 2023

Last Update Submitted That Met QC Criteria

November 15, 2023

Last Verified

November 1, 2023

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 9701M12240
  • R01HL059367 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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