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Serum Transferrin Receptor and Its Ratio to Serum Ferritin in the Diagnosis of Iron Deficiency
Open accessAbstract
The objective of the study was to evaluate the diagnostic efficiency of laboratory tests, including serum transferrin receptor (TfR) measurements, in the diagnosis of iron depletion. The patient population consisted of 129 consecutive anemic patients at the University Hospital of Turku who were given a bone marrow examination. Of these patients, 48 had iron deficiency anemia (IDA), 64 anemia of chronic disease (ACD), and 17 patients had depleted iron stores and an infectious or an inflammatory condition (COMBI). Depletion of iron stores was defined as a complete absence of stainable iron in the bone marrow examination. Serum TfR concentrations were elevated in the vast majority of the IDA and COMBI patients, while in the ACD patients, the levels were within the reference limits reported earlier for healthy subjects. TfR measurement thus provided a reliable diagnosis of iron deficiency anemia (AUCROC 0.98). Serum ferritin measurement also distinguished between IDA patients and ACD patients. However, the optimal decision limit for evaluation of ferritin measurements was considerably above the conventional lower reference limits, complicating the interpretation of this parameter. Calculation of the ratio TfR/log ferritin (TfR-F Index) is a way of combining TfR and ferritin results. This ratio provided an outstanding parameter for the identification of patients with depleted iron stores (AUCROC 1.00). In anemic patients, TfR measurement is a valuable noninvasive tool for the diagnosis of iron depletion, and offers an attractive alternative to more conventional laboratory tests in the detection of depleted iron stores.
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“Steady-state levels of hemoglobin and hematocrit in healthy adults typically correlate negatively with log 10 EPO levels (21).”
From Testosterone induces erythrocytosis via increased erythropoietin and suppressed hepcidin: evidence for a new erythropoietin/hemoglobin set point (2014) · cites this paper as [21]
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Metadata
- Authors
- Punnonen, K., Irjala, K., & Rajamäki, A.
- Affiliations
- Turku University Hospital (FI)
- From the Central Laboratory, Departments of Clinical Chemistry and Hematology, University Hospital of Turku, Turku, Finland.
- Venue
- Blood
- Publisher
- American Society of Hematology
- Published
- 1997-02-01
- Volume
- 89
- Issue
- 3
- Pages
- 1052-1057
- ISSN
- 0006-4971 (ISSN-L)
- 1528-0020
- OpenAlex
- W1924847619
- Cited by
- 859
- References
- 28
- Citations by year
- 2026: 11 · 2025: 10 · 2024: 19 · 2023: 20 · 2022: 10 · 2021: 26 · 2020: 29 · 2019: 25 · 2018: 37 · 2017: 22 · 2016: 28 · 2015: 44 · 2014: 35 · 2013: 30 · 2012: 45
- FWCI
- 13.83
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Blood (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
- Health Sciences › Medicine › Hematology › Hematological disorders and diagnostics
- Health Sciences › Medicine › Hematology › Erythropoietin and Anemia Treatment
- Keywords
- serum transferrin receptor, serum ferritin, iron deficiency anemia, anemia of chronic disease, iron depletion, diagnostic accuracy, inflammatory diseases
- MeSH terms
- Adult, Anemia, Blood Cell Count, Bone Marrow, Chronic Disease, Female, Ferritins, Humans, Iron, Male, Receptors, Transferrin, Staining and Labeling, Anemia, Iron-Deficiency
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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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