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J Lab Clin Med. 2005 Jan;145(1):41-6.

Diet and lifestyle are associated with serum C-reactive protein concentrations in a population-based study.

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Centre de Recerca Biom├Ędica, Hospital Universitari de Sant Joan, Catalonia, Spain.


C-reactive protein (CRP) has been proposed as an independent risk factor for cardiovascular disease. In this study we sought to investigate the association between several nutritional and lifestyle factors and serum CRP concentration in a population-based study. We studied 359 individuals (172 women, 187 men; age range 18-75 years) randomly selected from the town hall's registers and assessed their daily dietary intake using a 3-day estimated-food record. The median serum CRP concentration was 1.40 mg/L (range <0.10-47.48 mg/L; geometric mean 1.20 mg/L). We noted significant and independent direct associations between CRP and age, body-mass index, female sex, and serum triglyceride concentration. Bivariate analysis showed a significant inverse association between CRP and many nutrients (e.g., carbohydrates, proteins, lipids, thiamine, pyridoxine, tocopherol, and folate), but multiple-regression analysis indicated that only the effect of dietary folate intake was not dependent on other factors. Differences in folate intake did not produce changes in plasma homocysteine concentration, and we detected no negative correlation between dietary folate intake and log homocysteine (r = .02, P = .711). Strong positive correlations between the intake of folate and numerous other nutrients were found. This population-based study shows that a higher folate intake, in addition to other known constitutive and lifestyle factors, is significantly associated with a lower serum CRP concentration.

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