Fig. 2
Relationships between G6PD activity, ferritin, and hemoglobin. The relationship between glucose-6-phosaphte dehydrogenase (G6PD) activity and hemoglobin concentration (g/L) is presented (left panel) by for all participants (gray circles) along with the locally weighted scatterplot smoothing line (LOESS, red dashed). The concentration of serum ferritin (ng/mL) from a subset of participants with hemoglobin concentrations less than or equal to 100 g/L (anemic, red triangle) and hemoglobin concentrations above 130 g/L (non-anemic, blue squares) are presented (right panel) with the threshold for normal serum ferritin concentration for children aged 6 months to 15 years of age (7 ng/mL, dotted gray line)