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Updated: Aug 11, 2026

Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test (OGTT) and Insulin Tolerance Test (ITT)
Published on: January 7, 2018
An appropriate indicator for diagnosing gestational diabetes
Jui-Hung Sun1, Lai-Chu See, Tsung-Hong Chiu
1Division of Endocrinology & Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, Taipei.
Background:
This study was intended to simplify the diagnostic procedure for gestational diabetes mellitus (GDM) through using a single plasma glucose level, after a 100 g oral glucose tolerance test (OGTT), as the most appropriate indicator for diagnosing GDM in pregnant women with a positive 50 g, 1-hour oral glucose challenge test (GCT) in Northern Taiwan.
Methods:
A total of 973 native Taipei metropolitan pregnant women with a positive GCT, who underwent a 100 g, 3-hour OGTT were retrospectively surveyed. GDM was defined according to the standards of National Diabetes Data Group. Plasma glucose levels, obtained 1 hour following a GCT and at multiple timing following a 100 g oral glucose load, were used to plot receiver operative characteristic curves to determine the most appropriate indicator for diagnosing GDM.
Results:
In the 973 pregnant women with a positive GCT, a 2-hour plasma glucose level above 165 mg/dl revealed a sensitivity and specificity of 91.2% and 90.3%, respectively.
Conclusions:
To simplify the diagnostic procedure for GDM, we suggest that a 2-hour plasma glucose level above 165 mg/dl after a 100 g OGTT might be an appropriate indicator for diagnosing GDM in women with a positive GCT.
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