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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CONFLICTS OF INTEREST
No potential conflict of interest relevant to this article was reported.
FUNDING
This work was supported by research grants from Seoul National University Bundang Hospital (Grant No. 02-2021-0017 to Hak Chul Jang) and National Research Foundation of Korea (Grant No. 2021R1C1C1009875 to Joon Ho Moon).
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.
a Currently recommended criteria from the Korean Diabetes Association for the diagnosis of gestational diabetes mellitus.
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.