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Serum ferritin, soluble transferrin receptor, and total body iron for the detection of iron deficiency in early pregnancy: a multiethnic population-based study with low use of iron supplements.
Am J Clin Nutr. 2019 03 01; 109(3):566-575.AJ

Abstract

BACKGROUND

Which blood-based indicator best reflects the iron status in pregnant women is unclear. Better assessments of iron status in today's multiethnic populations are needed to optimize treatment and clinical recommendations.

OBJECTIVES

We aimed to determine the prevalence of anemia (hemoglobin <11.0 g/dL in first and <10.5 g/dL in second trimester) and iron deficiency (ID) by the iron indicators serum ferritin <15 µg/L, serum soluble transferrin receptor (sTfR) >4.4 mg/L, and calculated total body iron <0 mg/kg, and their associations with ethnicity.

METHODS

This was a population-based cross-sectional study from primary antenatal care of 792 healthy women in early pregnancy in Oslo, Norway. We categorized the women into 6 ethnic groups: Western European, South Asian, Middle Eastern, Sub-Saharan African, East Asian, and Eastern European.

RESULTS

Anemia was found in 5.9% of women (Western Europeans: 1.8%; non-Western: 0-14%, P < 0.05). ID from ferritin was found in 33% (Western Europeans: 15%; non-Western: 27-55%, P < 0.05). ID from sTfR was found in 6.5% (Western Europeans: 0.3%; non-Western: 0-20%, P < 0.01). Calculated total body iron indicated ID in 11% (Western Europeans: 0.6%, non-Western: 7.0-28%, P < 0.01). The prevalence of ID was significantly higher by all measures in South Asian, Sub-Saharan African, and Middle Eastern than in Western European women, and the ethnic differences persisted after adjusting for confounders. South Asians, Sub-Saharan Africans, and Middle Easterners had lower iron concentrations by all measures for all hemoglobin intervals. Anemia related to ID varied from 35% (sTfR) to 46% (total body iron) and 72% (ferritin) depending on the iron indicator used.

CONCLUSIONS

Women at the highest risk of ID and anemia were of South Asian, Middle Eastern, and Sub-Saharan African origin. The prevalence of ID differed considerably depending on the iron indicator used.

Authors+Show Affiliations

Department of General Practice, Institute of Health and Society, University of Oslo, Oslo, Norway.Department of General Practice, Institute of Health and Society, University of Oslo, Oslo, Norway.Department of Medical Biochemistry, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway.General Practice Research Unit (AFE), Department of General Practice, Institute of Health and Society, University of Oslo, Oslo, Norway.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30831600

Citation

Næss-Andresen, Marthe-Lise, et al. "Serum Ferritin, Soluble Transferrin Receptor, and Total Body Iron for the Detection of Iron Deficiency in Early Pregnancy: a Multiethnic Population-based Study With Low Use of Iron Supplements." The American Journal of Clinical Nutrition, vol. 109, no. 3, 2019, pp. 566-575.
Næss-Andresen ML, Eggemoen ÅR, Berg JP, et al. Serum ferritin, soluble transferrin receptor, and total body iron for the detection of iron deficiency in early pregnancy: a multiethnic population-based study with low use of iron supplements. Am J Clin Nutr. 2019;109(3):566-575.
Næss-Andresen, M. L., Eggemoen, Å. R., Berg, J. P., Falk, R. S., & Jenum, A. K. (2019). Serum ferritin, soluble transferrin receptor, and total body iron for the detection of iron deficiency in early pregnancy: a multiethnic population-based study with low use of iron supplements. The American Journal of Clinical Nutrition, 109(3), 566-575. https://doi.org/10.1093/ajcn/nqy366
Næss-Andresen ML, et al. Serum Ferritin, Soluble Transferrin Receptor, and Total Body Iron for the Detection of Iron Deficiency in Early Pregnancy: a Multiethnic Population-based Study With Low Use of Iron Supplements. Am J Clin Nutr. 2019 03 1;109(3):566-575. PubMed PMID: 30831600.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Serum ferritin, soluble transferrin receptor, and total body iron for the detection of iron deficiency in early pregnancy: a multiethnic population-based study with low use of iron supplements. AU - Næss-Andresen,Marthe-Lise, AU - Eggemoen,Åse Ruth, AU - Berg,Jens Petter, AU - Falk,Ragnhild Sørum, AU - Jenum,Anne Karen, PY - 2018/08/31/received PY - 2018/12/01/accepted PY - 2019/3/5/pubmed PY - 2020/1/22/medline PY - 2019/3/5/entrez KW - anemia KW - ethnicity KW - iron deficiency KW - pregnancy KW - serum ferritin KW - serum sTfR KW - total body iron SP - 566 EP - 575 JF - The American journal of clinical nutrition JO - Am J Clin Nutr VL - 109 IS - 3 N2 - BACKGROUND: Which blood-based indicator best reflects the iron status in pregnant women is unclear. Better assessments of iron status in today's multiethnic populations are needed to optimize treatment and clinical recommendations. OBJECTIVES: We aimed to determine the prevalence of anemia (hemoglobin <11.0 g/dL in first and <10.5 g/dL in second trimester) and iron deficiency (ID) by the iron indicators serum ferritin <15 µg/L, serum soluble transferrin receptor (sTfR) >4.4 mg/L, and calculated total body iron <0 mg/kg, and their associations with ethnicity. METHODS: This was a population-based cross-sectional study from primary antenatal care of 792 healthy women in early pregnancy in Oslo, Norway. We categorized the women into 6 ethnic groups: Western European, South Asian, Middle Eastern, Sub-Saharan African, East Asian, and Eastern European. RESULTS: Anemia was found in 5.9% of women (Western Europeans: 1.8%; non-Western: 0-14%, P < 0.05). ID from ferritin was found in 33% (Western Europeans: 15%; non-Western: 27-55%, P < 0.05). ID from sTfR was found in 6.5% (Western Europeans: 0.3%; non-Western: 0-20%, P < 0.01). Calculated total body iron indicated ID in 11% (Western Europeans: 0.6%, non-Western: 7.0-28%, P < 0.01). The prevalence of ID was significantly higher by all measures in South Asian, Sub-Saharan African, and Middle Eastern than in Western European women, and the ethnic differences persisted after adjusting for confounders. South Asians, Sub-Saharan Africans, and Middle Easterners had lower iron concentrations by all measures for all hemoglobin intervals. Anemia related to ID varied from 35% (sTfR) to 46% (total body iron) and 72% (ferritin) depending on the iron indicator used. CONCLUSIONS: Women at the highest risk of ID and anemia were of South Asian, Middle Eastern, and Sub-Saharan African origin. The prevalence of ID differed considerably depending on the iron indicator used. SN - 1938-3207 UR - https://www.unboundmedicine.com/medline/citation/30831600/Serum_ferritin_soluble_transferrin_receptor_and_total_body_iron_for_the_detection_of_iron_deficiency_in_early_pregnancy:_a_multiethnic_population_based_study_with_low_use_of_iron_supplements_ L2 - https://academic.oup.com/ajcn/article-lookup/doi/10.1093/ajcn/nqy366 DB - PRIME DP - Unbound Medicine ER -