Table 3.

Serum levels that differentiate ACD from IDA

Variable	ACD	IDA	Both conditions
Iron	Reduced	Reduced	Reduced
Serum transferrin	Reduced to normal	Increased	Reduced
Transferrin saturation	Reduced	Reduced	Reduced
Ferritin	Normal to increased	Reduced	Reduced to normal
Soluble TfR	Normal	Increased	Normal to increased
Ratio of TfR to log ferritin	Low (<1)	High (>2)	High (>2)
Cytokine levels	Increased	Normal	Increased