Transferrin Receptor-Ferritin Index for Diagnosis of Iron deficiency Anemia

 

Input
 

Transferrin Receptor		mcg/mL mg/L
Ferritin		mcg/L ng/mL pmol/L

 
Result
 
Important: Inputs must be complete to perform calculation.

 

TR Ferritin Index		# count index logit none number points score
Decimal Precision   0 1 2 3

 

 

Notes

• In this calculator, mcg is the abbreviation for micrograms.
• A TR Ferritin Index greater than 1.5 is both a sensitive and specific indication of iron deficiency anemia.
• An Index of less than 1.5 is associated with anemia of chronic disease

 
Equations used
 

TRFerritinIndex = TransferrinReceptor / log(Ferritin)

 

 

References

1. Punnonen K, Irjala K, Rajamaki A. Serum transferrin receptor and its ratio to serum ferritin in the diagnosis of iron deficiency. Blood. 1997 Feb 1;89(3):1052-7.
2. Rimon E, Levy S, Sapir A, et al. Diagnosis of iron deficiency anemia in the elderly by transferrin receptor-ferritin index. Arch Intern Med. 2002 Feb 25;162(4):445-9.
3. Weiss G, Goodnough LT. Anemia of chronic disease. N Engl J Med. 2005 Mar 10;352(10):1011-23. Review.