Table 5. Diagnostic Criteria of GDM in Two-step and One-step Approaches.

Measurement Time	100 g OGTT in Two-Step Approach with Carpenter and Coustan Criteria (30) a	One-Step Approach with 75 g OGTT b
Fasting plasma glucose	95 mg/dL	92 mg/dL
One-hour plasma glucose	180 mg/dL	180 mg/dL
Two-hour plasma glucose	155 mg/dL	153 mg/dL
Three-hour plasma glucose	140 mg/dL

^aThe diagnosis of GDM is made if at least two of four plasma glucose levels are met or exceeded.

^bOne abnormal value confirms GDM.