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Sponsored by: |
National Heart, Lung, and Blood Institute (NHLBI) |
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Information provided by: | National Heart, Lung, and Blood Institute (NHLBI) |
ClinicalTrials.gov Identifier: | NCT00005504 |
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 Type: | Observational |
Study Design: | Cohort, Prospective |
Official Title: | Longitudinal Investigation of Thromboembolism Etiology |
DNA, serum, plasma
Enrollment: | 21680 |
Study Start Date: | February 1998 |
Estimated Study Completion Date: | December 2006 |
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.
Ages Eligible for Study: | 45 Years and older |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Sampling Method: | Probability Sample |
ARIC and CHS cohorts
No eligibility criteria
Responsible Party: | NHLBI ( Jean Olson ) |
Study ID Numbers: | 5022 |
Study First Received: | May 25, 2000 |
Last Updated: | May 14, 2008 |
ClinicalTrials.gov Identifier: | NCT00005504 |
Health Authority: | United States: Federal Government |
Embolism and Thrombosis Pulmonary Embolism Respiratory Tract Diseases Embolism Lung Diseases |
Vascular Diseases Venous Thrombosis Thromboembolism Thrombosis |
Cardiovascular Diseases |