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Influence of insulin sensitivity and secretion on glycated albumin and hemoglobin A1c in pregnant women with gestational diabetes mellitus.


Int J Gynaecol Obstet. 2013 Mar 20;


Authors: Pan J, Zhang F, Zhang L, Bao Y, Tao M, Jia W


Abstract

OBJECTIVE: To examine the differential effects of insulin sensitivity and secretion on hemoglobin A1c (HbA1c) and glycated albumin (GA) at 24-32weeks of pregnancy in women with gestational diabetes mellitus (GDM). METHODS: A cross-sectional, sequential case series study was performed in pregnant women with an abnormal 50-g oral glucose-screening test. Hemoglobin A1c and GA measurements were taken during oral glucose tolerance test (OGTT). The homeostasis model assessment of insulin resistance (HOMA-IR) and beta-cell function (HOMA-%β), insulin sensitivity index (ISOGTT), and modified insulinogenic index were calculated to assess insulin sensitivity and secretory function. RESULTS: A total of 713 pregnant women were enrolled. The GDM group had lower ISOGTT and insulinogenic index scores, and a higher HOMA-IR score. Hemoglobin A1c was positively correlated with HOMA-IR. Glycated albumin was negatively correlated with insulinogenic index and HOMA-%β. Multiple regression analysis revealed that HbA1c was independently associated with diastolic pressure, 0- and 120-minute glucose, and HOMA-IR; GA was independently associated with 0- and 120-minute glucose. CONCLUSION: Compared with HbA1c, GA is more closely correlated with fasting and postprandial glucose, regardless of insulin resistance and blood pressure, and might be a better monitoring index in women with GDM.

PMID: 23522873 [PubMed - as supplied by publisher]