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Table 1 An overview of the screening tests used to screen for pregestational diabetes in early pregnancy, for GDM before 24 weeks of pregnancy and for GDM ≥ 24 weeks of pregnancy

From: Screening for pregestational and gestational diabetes in pregnancy: a survey of obstetrical centers in the northern part of Belgium

Screening tests used

Pregestational diabetes (n = 37)

GDM < 24 weeks (n = 25)

GDM ≥ 24 weeks (n = 45)

FPG

35% (13)

32% (8)

0

HbA1c

14% (5)

4% (1)

2% (1)

Random glycaemia

35% (13)

28% (7)

0

Glycosuria

30% (11)

4% (1)

0

Combination of tests

14% (5)

52% (13)

9% (4)

Combination of GCT and OGTT

   

   ≥ 130 mg/dl

0

8% (2)

16% (7)

   ≥ 140 mg/dl

0

40% (10)

64% (29)

One-step OGTT

   

   75 g

0

24% (6)

27% (12)

   100 g

0

12% (3)

0

  1. GDM: gestational diabetes; FPG: fasting plasma glucose; GCT: 50 g glucose challenge test; OGTT: oral glucose tolerance test.