Table II. Laboratory values associated with iron deficiency/depletion.

Laboratory Test	Value Indicative of Iron Deficiency
Ferritin	Less than 30 mcg/dL
Serum iron	Less than 50 mcg/dL
Transferrin saturation (T-sat)	Less than 15%
Total iron-binding capacity (TIBC)	Greater than 450 mcg/dL
Red cell count (RBC)	Less than 4 × 106 /mm3
Red cell distribution width (RDW)	Greater than 14.5%
Mean corpuscular volume (MCV)	Less than 80 fL
Hemoglobin (Hgb)	Less than 13 g/dL, males
	Less than 12 g/dL, menstruating females

Adapted from Alleyne et al, 2008, modified per Kiss et al, (2013).