The observed and modeled distributions of transferrin saturation values are shown for each ethnicity and sex.

Distribution of transferrin saturation values for 1301 African American men (A), 1089 African American women (B), 2328 Caucasian men (C), and 2483 Caucasian women (D). A histogram of the observed data is given. The dashed lines represent the fitted normal distributions representing 3 subpopulations. The overall fitted mixture distribution is shown with a solid line.