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Journal Article

Iron Metabolism, Hepcidin, and Mortality (the Ludwigshafen Risk and Cardiovascular Health Study)


Mueller-Myhsok,  Bertram
RG Statistical Genetics, Max Planck Institute of Psychiatry, Max Planck Society;

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Grammer, T. B., Scharnagl, H., Dressel, A., Kleber, M. E., Silbernagel, G., Pilz, S., et al. (2019). Iron Metabolism, Hepcidin, and Mortality (the Ludwigshafen Risk and Cardiovascular Health Study). CLINICAL CHEMISTRY, 65(7), 849-861. doi:10.1373/clinchem.2018.297242.

Cite as: https://hdl.handle.net/21.11116/0000-0009-7261-9
BACKGROUND: Anemia has been shown to be a risk factor for coronary artery disease (CAD) and mortality, whereas the role of iron metabolism remains controversial.
METHODS: We analyzed iron metabolism and its associations with cardiovascular death and total mortality in patients undergoing coronary angiography with a median follow-up of 9.9 years. Hemoglobin and iron status were determined in 1480 patients with stable CAD and in 682 individuals in whom significant CAD had been excluded by angiography.
RESULTS: Multivariate-adjusted hazard ratios (HRs) for total mortality in the lowest quartiles of iron, transferrin saturation, ferritin, soluble transferrin receptor (sTfR), and hemoglobin were 1.22 (95% CI, 0.96-1.60), 1.23 (95% CI, 0.97-1.56), 1.27 (95% CI, 1.02-1.58), 1.26 (95% CI, 0.97-1.65), and 0.99 (95% CI, 0.79-1.24), respectively, compared to the second or third quartile, which served as reference (1.00) because of a J-shaped association. The corresponding HRs for total mortality in the highest quartiles were 1.44 (95% CI, 1.10-1.87), 1.37 (95% CI, 1.05-1.77), 1.17 (95% CI, 0.92-1.50), 1.76 (95% CI, 1.39 -2.22), and 0.83 (95% CI, 0.63-1.09). HRs for cardiovascular death were similar. For hepcidin, the adjusted HRs for total mortality and cardiovascular deaths were 0.62 (95% CI, 0.49-0.78) and 0.70 (95% CI, 0.52-0.90) in the highest quartile compared to the lowest one.
CONCLUSIONS: In stable patients undergoing angiography, serum iron, transferrin saturation, sTfR, and ferritin had J-shaped associations and hemoglobin only a marginal association with cardiovascular and total mortality. Hepcidin was continuously and inversely related to mortality. (C) 2019 American Association for Clinical Chemistry