Multivariate analyses of hepcidin levels according to different definitions of iron status.

Abbreviations: TSAT, Transferrin saturation; CRP, C-reactive protein; BIC, Bayesian Information Criterion; AIC, Akaike information Criterion; Ref, reference class. β±sd Regression coefficients for the different iron indexes in the linear regression models of hepcidin values (square-root transformed). 1Models were adjusted for measured glomerular filtration rate, gender, age, body mass index, albuminemia, erythropoietin, oral iron and centre. 2Models for Lipschitz’s iron index and the four-class iron index were also adjusted for C-reactive protein (CRP) in two classes (≤8 vs >8 ng/mL).