Hepcidin basal levels in controls and in patient groups A (at diagnosis) and B (iron-depleted) divided according to genotype. Geometric means with 95% confidence intervals (CIs) are shown. *P < .001 versus all patient group B; **P = .001 versus C282Y/C282Y group B, and P = .015 versus C282Y/H63D group A; ***P < .001 versus C282Y/H63D group B.