A 2 hour versus the 3 hour 100 g glucose tolerance test for diagnosing gestational diabetes mellitus
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P. Jakobi
Abstract
Aim: To determine how the omission of the third hour glucose measurement of the 100 g oral glucose tolerance test (GTT) affects the diagnosis of gestational diabetes mellitus (GDM).
Methods: Retrospective chart review of 876 women delivered in a tertiary care hospital in Israel during a three-year period, who underwent a 100 g 3 hour oral GTT following an abnormal 50 g glucose screen. GDM was diagnosed according to the “criterion standard” accepted in the Fourth International Workshop Conference on GDM. The results of the 100 g 3 hour oral GTT were then retrospectively re-evaluated by omission of the third hour plasma glucose measurement from the “criterion standard”.
Results: GDM was diagnosed in 28.4% of the study patients, while the omission of the third hour glucose measurement resulted in a 26.4% diagnosis of GDM. The perinatal data of the 18-omitted cases suggests that their exclusion from the GDM group would not have altered substantially the perinatal outcome of the study cohort.
Conclusions: A 100 g 2 hour oral GTT is a simple and economic alternative to the 100 g 3 hour oral GTT.
Copyright © 2004 by Walter de Gruyter GmbH & Co. KG
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