BACKGROUND: The aim of this study was to evaluate the screening for gestational diabetes identify the validation of 50g-Oral glucose challenge test, a cutoff of >130 mg/dl is better for GDM screening.
METHODS: A total 1,279 pregnant women were delivered at our facility during 2015 to 2016, 436 cases were excluded. Finally, 843 pregnant women underwent 50-g oral glucose-tolerance testing for gestational diabetes mellitus at 18 to 24 weeks of gestation. Gestational diabetes mellitus (GDM) diagnosed on the International Diabetes in Pregnancy Consensus Group (IADPSG) criteria. The screening glucose challenge test for gestational diabetes mellitus involves drinking a solution containing 50 grams of glucose, and measuring blood sugar levels 1 hour later. Most of institutes accept the cut-off point > 140mg/dl. We set the cut-off point at 130 mg/dl for strictly screening. Forty-five cases of negative results of 50g-GCT include the 8 cases of GDM.
RESULTS: A casual blood glucose test (>100mg/dl) is insufficient screening for GDM. The morbidity of GDM is 18% between 130-139mg/dl blood glucose level . The morbidity of GDM is 24% between 140-149mg/dl blood glucose level . There is no difference between both groups. For GDM, 50g-Oral glucose challenge test, a cutoff of >130 mg/dl is better than 140 mg/dl for screening.
CONCLUSION: We propose GDM screening should be strictly (cutoff of >130 mg/dl ) in accordance with changes of diagnostic criteria.