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This population-based cross-sectional study in South London looks at the total homocysteine (tHcy) levels in groups of different ethnic background and the possible role of environmental factors and the 677C→T genetic polymorphism of the methylenetetrahydrofolate reductase (MTHFR). Fasting plasma tHcy was measured in 1392 men and women, age 40–59 years; 475 were white, 465 of African origin (of whom...
The reproducibility of nutrient intakes measured by a semi-quantitative food frequency questionnaire were examined in 418 African American and white men and women between the ages of 45 and 64 years. Subjects were a subset of participants in the Atherosclerosis Risk in Communities (ARIC) study. Reliability coefficients were calculated for nutrient intakes reported over a mean elapsed period of three...
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