Objectives
To evaluate whether gestational diabetes mellitus (GDM) diagnosed by different criteria impacts perinatal outcome.
Methods
This was a retrospective study of deliveries with a diagnosis of GDM (2014–2016). Perinatal outcomes were compared between patients with: (1) GDM diagnosed according to a single abnormal value on the 100-g oral glucose tolerance test (OGTT); (2) two or more abnormal OGTT values; and (3) a 50-g glucose challenge test (GCT) value ≥200 mg/dL.
Results
A total of 1163 women met the inclusion criteria, of whom 441 (37.9%) were diagnosed according to a single abnormal OGTT value, 627 (53.9%) had two or more abnormal OGTT values and 95 (8.17%) had a GCT value ≥200 mg/dL. Diet-only treatment was significantly higher in the single abnormal value group (70.3% vs. 65.1% vs. 50.5%) and rates of medical treatment were significantly higher in the GCT ≥ 200 mg/dL group (P < 0.05). Women in the GCT ≥ 200 mg/dL group had higher rates of neonatal intensive care unit (NICU) admission (10.5% vs. 2.7% vs. 2.8%, P < 0.001) and neonatal hypoglycemia (5.3% vs. 0.5% vs. 0.8%, P < 0.001). On multivariate logistic regression, GCT ≥ 200 mg/dL was no longer associated with higher rates of NICU admission and neonatal hypoglycemia (P > 0.05).
Conclusion
No difference was noted in the perinatal outcome amongst the different methods used for diagnosing GDM.
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