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VITRO-Trial. B Vitamins and the Secondary Prevention of Venous Thrombosis

Pulmonary Embolism Clinical Trial

Official title:
Homocysteine Lowering by B Vitamins and the Secondary Prevention of Deep-Vein Thrombosis and Pulmonary Embolism. A Randomized, Placebo-Controlled, Double Blind Trial.

Clinical Trial Summary

The VITRO (Vitamins and Thrombosis) study investigated the effect of homocysteine lowering by daily supplementation of B-vitamins on the risk reduction of deep-vein thrombosis and pulmonary embolism. Patients between 20 to 80 years old with a first objectively confirmed proximal deep-vein thrombosis or pulmonary embolism in the absence of major risk factors and a homocysteine concentration above the 75th percentile of a reference group were asked to participate (hyperhomocysteinemic group). A similar study was conducted in a random sample of patients with a homocysteine below the 75th percentile of the reference group (normohomocysteinemic group). After informed consent patients were randomized to daily multivitamin supplementation (5 mg folic acid, 50 mg pyridoxine and 0.4 mg cyanocobalamin) or placebo and were followed for 2.5 years. End-points were objectively diagnosed recurrent deep-vein thrombosis or pulmonary embolism.

Clinical Trial Description

n/a

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Prevention

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00314990
Study type Interventional
Source Radboud University
Contact
Status Completed
Phase N/A
Start date January 1996
Completion date January 2003
View Details
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