Table 1.

Screening and diagnosis of gestational diabetes mellitus classifications

Classification	Glucose load	No. of impaired value for diagnosis	Threshold
Group 1	OGTT with 75 g 2-hr	1	>92, 180, and 153 mg/dL for fasting, 1 and 2 hr
Group 2	OGTT with 75 g 2-hr	1	>100 and 144 mg/dL for fasting and 2 hr
Group 3	OGTT with 75 g 2-hr	1	>110 and 140 mg/dL for fasting and 2 hr
Group 4	OGTT with 75 g 2-hr	1	>180 mg/dL for 2 hr
Group 5	GCT with 50 g 1-hr, followed by OGTT with 100 g 3-hr	2	>140 mg/dL >95, 180, 155, and 140 mg/dL for fasting, 1, 2, and 3 hr
Group 6	GCT with 50 g 1-hr, followed by OGTT with 100 g 3-hr	2	>140 mg/dL >105, 155, 165, and 145 mg/dL for fasting, 1, 2, and 3 hr
Group 7	OGTT with 100 g 3-hr	1	>120, 175, 155, and 140 mg/dL for fasting, 1, 2, and 3 hr

OGTT, oral glucose tolerance test; GCT, glucose challenge test.