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Equation of Witte et al for Predicting Iron Deficiency from Serum Ferritin and the Erythrocyte Sedimentation Rate (ESR)

Purpose:	To estimate the probability of iron deficiency in a patient based on the serum ferritin level and ESR using the equation of Witte et al.
Specialty:	Hematology Oncology Clinical Laboratory Nephrology, Urology, Obstetrics & Gynecology, Pedatrics, Genetics Nephrology, Urology, Obstetrics & Gynecology, Pedatrics, Genetics General Surgery & Anesthesiology Gastroenterology
Objective:	laboratory tests
ICD-10:	D50
Description:	Serum ferritin may be increased as an acute phase reactant in some patients with iron deficiency and a chronic inflammatory condition. The erythrocyte sedimentation rate (ESR) is an indicator of the inflammatory response. It can be used to predict which patients with "normal" ferritin levels in the range of 10-90 ng/mL could be iron deficient.

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