Figure 3.

Association between serum ferritin and hemoglobin (Hb) levels. (a) There was a positive relationship between Hb and serum ferritin levels. (b) The corresponding serum ferritin level for the current definition of female anemia (Hb: 12.0 g/dL) was 5.1 ng/mL, which was lower than the adequate ferritin level for hair growth (40–60 ng/mL). The corresponding Hb value for a ferritin level of 40–60 ng/mL was 13.1–13.8 g/dL, which was higher than the level for the current definition of female anemia (Hb: 12.0 g/dL), implying that ferritin was a more sensitive marker than Hb for the early detection of ID. Hb: Hemoglobin