alexa Hemoglobin A1C but not Glycated Albumin Overestimates G
ISSN: 2155-6156

Journal of Diabetes & Metabolism
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Research Article

Hemoglobin A1C but not Glycated Albumin Overestimates Glycemic Control due to Iron Deficiency in Pregnant Women with Diabetes

Tatsumi Moriya1, Madoka Matsubara1 and Masafumi Koga2*

1Health Care Center, Kitasato University, Kanagawa, Japan

2Department of Internal Medicine, Kawanishi City Hospital, Hyogo, Japan

*Corresponding Author:
Masafumi Koga
Department of Internal Medicine
Kawanishi City Hospital
5-21-1 Higashi-Uneno, Kawanishi
Hyogo 666-0195, Japan
Tel: +81-72- 794-2321
Fax: +81-72-794-6321
E-mail: [email protected]

Received date: July 26, 2014; Accepted date: September 27, 2014; Published date: October 06, 2014

Citation: Moriya T, Matsubara M, Koga M (2014) Hemoglobin A1C but not Glycated Albumin Overestimates Glycemic Control due to Iron Deficiency in Pregnant Women with Diabetes. J Diabetes Metab 5:445. doi: 10.4172/2155-6156.1000445

Copyright: © 2014 Moriya T, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Background: Pregnant women are frequently complicated with iron deficiency. Because Hemoglobin A1c (HbA1c) shows an apparently high value in patients with iron-deficiency, HbA1c was reported to be elevated due to iron deficiency in pregnant women with or without diabetes. In the present study, we investigated whether HbA1c or Glycated Albumin (GA) accurately reflects glycemic control state estimated from the Mean Blood Glucose (MBG) obtained by Continuous Glucose Monitoring (CGM) in pregnant women with diabetes. Methods: We studied 20 pregnant women with diabetes whose glycemic control was stable and CGM was performed to determine MBG. The estimated HbA1c and GA were calculated from the MBG, and the measured values were compared with the estimated values. Correlations between Mean Corpuscular Hemoglobin (MCH), an index of iron-deficiency, and continuous variables were examined. Results: HbA1c was not significantly correlated with GA. The measured GA was not significantly different from the estimated GA (16.0 ± 2.7% vs. 16.0 ± 1.8%, P=0.982). On the other hand, the measured HbA1c was significantly higher than the estimated HbA1c [6.4 ± 0.9% (46.3 ± 10.3 mmol/mol) vs. 5.6 ± 0.5% (38.2 ± 5.4 mmol/mol), P<0.001]. The measured HbA1c (R= –0.598, P=0.005) and the measured HbA1c/estimated HbA1c ratio (R= –0.566, P=0.009) showed significant inverse correlations with MCH. Conclusions: HbA1c overestimates glycemic control due to iron deficiency in pregnant women with diabetes, whereas GA accurately reflected their glycemic control. Therefore, GA is a better index of glycemic control than HbA1c in pregnant women with diabetes.

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