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  • Title: Gestational diabetes: an alternative, patient-friendly approach for using the diagnostic 100-g OGTT in high-risk populations.
    Author: Agarwal MM, Dhatt GS, Punnose J.
    Journal: Arch Gynecol Obstet; 2006 Mar; 273(6):325-30. PubMed ID: 16328394.
    Abstract:
    OBJECTIVE: To simplify the 100-g oral glucose tolerance test (OGTT) for making a diagnosis of gestational diabetes mellitus (GDM). METHODS: During a 6-year period, 6,801 pregnant women underwent the 3-h, 100-g OGTT in a high-risk, multiethnic population. All these women had either a positive glucose challenge test/clinical history or were part of a universal screening protocol. The area (AUC) under the receiver-operating characteristic curve was used to compare the performance of the fasting plasma glucose (FPG), 1-h, 2-h and 3-h glucose values for GDM diagnosis. Ideal cut-offs of the best performing glucose value alone and in combination were used to find the best predictor for GDM with minimal loss of sensitivity and specificity. RESULTS: Using the American Diabetes Association criteria, 2,127 (31.3%) women were classified as having GDM. The 2-h value was the best performing (AUC 0.933) glucose value; at an optimal cut-off of >or=8.6 mmol/l, the sensitivity was 83.6% with a specificity of 92.8%. It did not achieve sufficient collective specificity and sensitivity at various thresholds to be useful. However, in combination with FPG (either FPG >or=5.3 mmol/l or 2-h >or=8.6 mmol/l) or (either FPG >or=5.6 mmol/l or 2-h >or=8.6 mmol/l), the sensitivity/specificity were 98.5%/84.7% and 92.5%/89.3%, respectively. CONCLUSION: An abbreviated 100-g OGTT, using only the FPG and 2-h glucose value, may be a useful alternative in high-risk populations to make a diagnosis of GDM by being cost-effective and patient-friendly.
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