BACKGROUND: Hemoglobin and erythrocyte protoporphyrin (EP) tests are commonly used to screen for iron deficiency. However, little research has been done to systematically evaluate the sensitivity and specificity of these 2 tests. OBJECTIVE: The objective of this study was to evaluate the sensitivity and specificity of hemoglobin and EP measurements in predicting iron deficiency in preschool children and in women of childbearing age. DESIGN: We examined data from the third National Health and Nutrition Examination Survey (n = 2613 children aged 1-5 y and n = 5175 nonpregnant women aged 15-49 y). Children or women with blood lead >or= 10 microg/dL were excluded from this study. We used the receiver operating characteristic (ROC) curve to characterize the sensitivity and specificity of hemoglobin and EP measurements in screening for iron deficiency, defined as having abnormal values for >or= 2 of the following 3 indexes: mean cell volume, transferrin saturation, and serum ferritin. RESULTS: The ROC performance of EP was consistently better than that of hemoglobin for detecting iron deficiency in preschool children. However, in nonpregnant women, we found no significant difference between EP and hemoglobin in ROC performance for detecting iron deficiency. We observed the same results when we stratified the analyses by sex and race of the children and by race of the women. CONCLUSIONS: For children aged 1-5 y, EP is a better screening tool for iron deficiency than is hemoglobin. However, for nonpregnant women, EP and hemoglobin have similar sensitivity and specificity for predicting iron deficiency.
BACKGROUND: Hemoglobin and erythrocyte protoporphyrin (EP) tests are commonly used to screen for iron deficiency. However, little research has been done to systematically evaluate the sensitivity and specificity of these 2 tests. OBJECTIVE: The objective of this study was to evaluate the sensitivity and specificity of hemoglobin and EP measurements in predicting iron deficiency in preschool children and in women of childbearing age. DESIGN: We examined data from the third National Health and Nutrition Examination Survey (n = 2613 children aged 1-5 y and n = 5175 nonpregnant women aged 15-49 y). Children or women with blood lead >or= 10 microg/dL were excluded from this study. We used the receiver operating characteristic (ROC) curve to characterize the sensitivity and specificity of hemoglobin and EP measurements in screening for iron deficiency, defined as having abnormal values for >or= 2 of the following 3 indexes: mean cell volume, transferrin saturation, and serum ferritin. RESULTS: The ROC performance of EP was consistently better than that of hemoglobin for detecting iron deficiency in preschool children. However, in nonpregnant women, we found no significant difference between EP and hemoglobin in ROC performance for detecting iron deficiency. We observed the same results when we stratified the analyses by sex and race of the children and by race of the women. CONCLUSIONS: For children aged 1-5 y, EP is a better screening tool for iron deficiency than is hemoglobin. However, for nonpregnant women, EP and hemoglobin have similar sensitivity and specificity for predicting iron deficiency.
Authors: Betsy Lozoff; Mary Lu Angelilli; Jigna Zatakia; Sandra W Jacobson; Agustin Calatroni; John Beard Journal: Am J Hematol Date: 2007-02 Impact factor: 10.047
Authors: Andrea J Sharma; Nicole D Ford; Joanna E Bulkley; Lindsay M Jenkins; Kimberly K Vesco; Anne M Williams Journal: J Nutr Date: 2021-11-02 Impact factor: 4.687
Authors: Martin N Mwangi; Sumi Maskey; Pauline E A Andang o; Noel K Shinali; Johanna M Roth; Laura Trijsburg; Alice M Mwangi; Han Zuilhof; Barend van Lagen; Huub Fj Savelkoul; Ayşe Y Demir; Hans Verhoef Journal: BMC Med Date: 2014-11-26 Impact factor: 8.775