Serum homocysteine,thermolabile variant of methylene tetrahydrofolate reductase (MTHFR), and venous thromboembolism: Longitudinal Investigation of Thromboembolism Etiology (LITE) |
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Authors: | Tsai Albert W Cushman Mary Tsai Michael Y Heckbert Susan R Rosamond Wayne D Aleksic Nena Yanez N David Psaty Bruce M Folsom Aaron R |
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Institution: | Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis 55454, USA. |
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Abstract: | We sought to examine prospectively the association of serum homocysteine and the methylene tetrahydrofolate reductase (MTHFR) C677T gene polymorphism with risk of venous thromboembolism (VTE). We studied these relationships in a nested case-control study of 303 VTE cases and 635 matched controls from a population-based cohort of 21,680 adults from six U.S. communities. The highest quintile of serum homocysteine carried a non-statistically significant adjusted odds ratio of 1.55 (95% CI, 0.93-2.58) compared to the lowest quintile in the overall cohort but a significant association among adults aged 45-64 years (OR = 2.05, 95% CI, 1.10-3.83) and an inverse association in those > or = 65 years of age. Carriers of the MTHFR C677T polymorphism were not at higher risk for VTE than those with normal genotype (OR = 0.74, 95% CI = 0.56-0.98). Our prospective data showed, at most, a weak relationship between homocysteine and VTE risk, with associations larger among younger participants. MTHFR C677T was not a risk factor for VTE. |
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Keywords: | deep vein thrombosis epidemiology homocysteine MTHFR pulmonary embolism |
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