• Rodrigo Dias Nunes, Mayara Eloisa Flôres, Mayara Seemann, Eliane Traebert, and Jefferson Traebert.
• . Escola de Medicina. Universidade do Sul de Santa Catarina, Palhoça, SC, Brasil.
• Rev Assoc Med Bras (1992). 2020 May 15; 66 (2): 139-145.

ObjectiveTo evaluate two different criteria, one or two cut-off values, of oral glucose tolerance test with 75g of glucose for the diagnosis of gestational diabetes mellitus.MethodsA cross-sectional study involving 120 records of pregnant women who received prenatal care at the service of a Brazilian university was carried out. Bivariate analysis of obstetric and perinatal outcomes was performed using the chi-square test.ResultsConsidering criterion I, 12.5% of patients were diagnosed with gestational diabetes mellitus. Patients were 3.57 times more likely to have a large fetus for the gestational age at birth (p=0.038). Using criterion II, gestational diabetes mellitus was diagnosed in 5.8% of patients, macrosomia was 7.73 times more likely to be found in the presence of gestational diabetes mellitus (p=0.004), and a large fetus for the gestational age at birth was 8.17 times more likely (p=0.004).ConclusionsThere was a difference in the prevalence of gestational diabetes mellitus between the two criteria analyzed. The new criterion proposed increased prevalence.

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