Figure 1.

Receiver -operating characteristic curves for serum iron indicators using the presence or absence of bone marrow hemosiderin as the reference standard for iron sufficiency or deficiency, respectively. The points along the curves from left to right represent calculations for ferritin level ≤12, ≤20, ≤50, ≤100, and ≤150 μg/L; total iron-binding capacity ≥81, ≥72, ≥63, ≥54, and ≥45 μmol/L; and transferrin saturation value of 0.10, 0.1, 5, and 0.20.