History of OGTT for diagnosis of GDM
| Year | Author or organisation | Gestational age | Main contribution or changes |
|---|---|---|---|
| 1964 | O'Sullivan and Mahan | No recommendation | Set up OGTT as diagnostic criteria of GDM |
| 1979 | NDDG | No recommendation | Test plasma rather than whole blood to increase reproducibility |
| 1982 | Carpenter and Coustan | 24–33 | Apply the glucose oxidase method rather than the Somogyi-Nelson method to avoid the measurement of other substances |
| 1991 | The 3rd Workshop | No recommendation | Apply 75 g glucose rather than 100 g glucose |
| 1996 | CNGOF | 24–28 | First recommend gestational age |
| 1996 | EASD | 28 | |
| 2000 | ADA | 24–28 | Test fasting, 1 and 2 hours |
| 2008 | HAPO study | 24–32 | Focus on perinatal outcome associated with OGTT value |
| 2010 | IADPSG | 24–28 | Adjust diagnosis cut-off |
| 2011 | ADA | 24–28 | |
| 2013 | WHO | 24–28* | |
| 2015 | ADA | 24–28 | |
| 2015 | FIGO | 24–28 |
*The WHO-2013 guideline recommended that an OGTT could be performed at any time during pregnancy for diagnosis of GDM, but as an update of the WHO-1999 version, the formal systematic testing for GDM is between 24 and 28 gestational weeks.
ADA, American Diabetes Association; CNGOF, French College of Gynecologists and Obstetricians; EASD, European Association for the Study of Diabetes; FIGO, International Federation of Gynecology and Obstetrics; GDM, gestational diabetes mellitus; HAPO, Hyperglycemia and Adverse Pregnancy Outcomes; IADPSG, International Association of Diabetes and Pregnancy Study Groups; NDDG, National Diabetes Data Group; OGTT, oral glucose tolerance test; The 3rd Workshop, The 3rd International Workshop-Conference on GDM.