Evaluation of hemoglobin performance in the assessment of iron stores in feto-maternal pairs in a high-risk population: receiver operating characteristic curve analysis
Rev. bras. hematol. hemoter
;
37(3): 178-183, May-Jun/2015. tab, graf
Article
in English
| LILACS
| ID: lil-752537
ABSTRACT
By applying receiver operating characteristic curve analysis, the objective of this study was to see whether hemoglobin levels reflect body iron stores in a group of pregnant women at term who, by using serum ferritin as the reference test, had a high pre-test prob- ability of having iron deficiency anemia. Likewise, we evaluated the ability of hemoglobin and maternal serum ferritin levels to predict iron deficiency anemia in newborns. Methods:
Hemoglobin and serum ferritin were measured in 187 pregnant women at term belonging to a group with a high pre-test probability of iron deficiency anemia and their newborns. Women with Hb <11.0 g/dL and newborns with cord Hb <13.0 g/dL were classified as anemic. A serum ferritin <12.0 µg/L in women and a cord blood serum ferritin <35.0 µg/L were considered to reflect empty iron stores. Receiver operating characteristic curve analysis was applied to select the cut-off points that better reflected iron stores.Results:
The Hb cut-off point selected by receiver operating characteristic curve analysis in women was <11.5 g/dL (sensitivity 60.82, specificity 53.33%, Youden Index 0.450). Most of the newborns had normal Hb which precluded this analysis. Maternal Hb <11.0 g/dL was the cut-off point that best reflected iron deficiency anemia in newborns (sensitivity 55.88%, specificity 57.24%, Youden Index 0.217). The best cut-off point of maternal serum ferritin to reflect empty iron stores in newborns was <6.0 µg/L (sensitivity 76.47%, specificity 31.58%, Youden Index 0.200).Conclusion:
Hemoglobin concentration performed poorly to detect iron deficiency anemia in women at term with high risk for iron deficiency and their newborns.
Full text:
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Index:
LILACS (Americas)
Main subject:
Pregnancy
/
Anemia, Iron-Deficiency
/
Diagnostic Tests, Routine
/
Ferritins
Type of study:
Etiology study
/
Prognostic study
/
Risk factors
Language:
English
Journal:
Rev. bras. hematol. hemoter
Journal subject:
Hematology
Year:
2015
Type:
Article
Affiliation country:
Mexico
Institution/Affiliation country:
Universidad Autónoma de Nuevo León/MX
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