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Table 2—

GDM cases using the WHO criteria and prevalence estimates

IGTDiabetesTotal
New cases with glucose level ≥ 7.8 mmol/l at the initial screening and completed OGTT (n152 19 171 
New cases with glucose level <7.8 mmol/l at the initial screening (n
Case subjects with known diabetes (n) 
Total cases (n154 23 177 
Crude rates (%) 1.63 0.24 1.87 
Expected cases in those who refused the OGTT (n)§ 38 42 
Adjusted rate (%) 2.03 0.28 2.31 
IGTDiabetesTotal
New cases with glucose level ≥ 7.8 mmol/l at the initial screening and completed OGTT (n152 19 171 
New cases with glucose level <7.8 mmol/l at the initial screening (n
Case subjects with known diabetes (n) 
Total cases (n154 23 177 
Crude rates (%) 1.63 0.24 1.87 
Expected cases in those who refused the OGTT (n)§ 38 42 
Adjusted rate (%) 2.03 0.28 2.31 
*

OGTT performed later in pregnancy, GDM was then confirmed;

cases confirmed before the 15th gestational week;

n = 9,474;

§

predictive values were estimated from the initial screening glucose levels of the 701 women who completed OGTT and applied to the 187 women who refused the OGTT: 7.8–9.0 mmol/l, 19%; 9.1–10.0 mmol/l, 26%; 10.1–11.0 mmol/l, 39%; 11.1–12.0 mmol/l, 50%; and ≥12.1 mmol/l 55%.

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