Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
Copyright © 2022 Korean Diabetes Association
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Screening methods | Glucose concentration, mg/dL |
||||
---|---|---|---|---|---|
Fasting | 1-hour | 2-hour | 3-hour | ||
One-step | All women undergo a 75 g OGTT after fasting for ≥8 hours. | ||||
GDM is diagnosed when ≥1 value exceeds the criteria. | |||||
IADPSG (plasma)a | 92 | 180 | 153 | NA | |
Two-step | Initial screening: a 50 g GCT is done without fasting. | ||||
Women with a positive GCT whose 1-hour glucose ≥130 to 140 mg/dL undergo a 100 g OGTT after fasting for ≥8 hours. | |||||
GDM is diagnosed when ≥2 values exceed the criteria. | |||||
O' Sullivan (whole blood) | 90 | 165 | 145 | 125 | |
NDDG (plasma) | 105 | 190 | 165 | 145 | |
Carpenter and Coustan (plasma)a | 95 | 180 | 155 | 140 |
One-step | Two-step | |
---|---|---|
Fact | More women are diagnosed GDM (2- to 3-fold compared to the two-step approach). | Less women are diagnosed with GDM. |
Strength | Using a 75 g OGTT as in the nonpregnant state | Easier screening (a 50 g GCT), which does not require fasting |
GDM screening test can be done at a single visit. | ||
Based on a large-scale, multinational study assessing adverse pregnancy outcomes (HAPO study) | Less socioeconomic burden | |
May prevent long-term maternal and offspring complications by including milder forms of GDM (but no differences were found for adverse pregnancy outcomes from the two RCTs). | ||
Weakness | All pregnant women need fasting ≥8 hours and undergo a 2-hour OGTT. | ~20% of women should return for a 3-hour OGTT with fasting ≥8 hours. |
More women may suffer from mental stress having been diagnosed and treated for GDM. | ||
Higher socioeconomic burden |
OGTT, oral glucose tolerance test; GDM, gestational diabetes mellitus; IADPSG, International Association of Diabetes and Pregnancy Study Group; GCT, glucose challenge test; NDDG, National Diabetes Data Group. Currently recommended criteria from the Korean Diabetes Association for the diagnosis of gestational diabetes mellitus.
GDM, gestational diabetes mellitus; OGTT, oral glucose tolerance test; HAPO, the Hyperglycemia and Adverse Pregnancy Outcome; RTC, randomized controlled trial; GCT, glucose challenge test.