4.5 Article

Applying WHO2013 diagnostic criteria for gestational diabetes mellitus reveals currently untreated women at increased risk

Journal

ACTA DIABETOLOGICA
Volume -, Issue -, Pages -

Publisher

SPRINGER-VERLAG ITALIA SRL
DOI: 10.1007/s00592-023-02148-2

Keywords

Diagnosis; Gestational diabetes mellitus; IADPSG; Outcomes; Prevalence; WHO

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This study aims to compare the prevalence of gestational diabetes mellitus (GDM) in a Danish cohort using the current Danish criteria and the WHO2013 criteria, and evaluate the adverse pregnancy outcomes among untreated women who fall between the diagnostic thresholds. The results showed a significantly higher GDM prevalence when using the WHO2013 criteria compared to the Danish criteria, and untreated GDM in the gap between the two criteria resulted in higher risks of adverse pregnancy outcomes.
AimsTo estimate the prevalence of gestational diabetes mellitus (GDM) in a Danish cohort comparing the current Danish versus the WHO2013 diagnostic criteria, and to evaluate adverse pregnancy outcomes among currently untreated women in the gap between the diagnostic thresholds.MethodsDiagnostic testing was performed by a 75 g oral glucose tolerance test (OGTT) at 24-28 weeks' gestation in a cohort of pregnant women. GDM diagnosis was based on the current Danish criterion (2-h glucose & GE; 9.0 mmol/L, GDM(DK)) and on the WHO2013 criteria (fasting & GE; 5.1, 1 h & GE; 10.0 or 2 h glucose & GE; 8.5 mmol/L, GDM(WHO2013)). Currently untreated women fulfilling the WHO2013 but not the Danish diagnostic criteria were defined as New-GDM-women (GDM(WHO2013)-positive and GDM(DK)-negative). Adverse outcomes risks were calculated using logistic regression.ResultsOGTT was completed by 465 women at a median of 25.7 weeks' gestation. GDM(DK) prevalence was 2.2% (N = 10) and GDM(WHO2013) 21.5% (N = 100). New-GDM was present in 19.4% (N = 90), of whom 90.0% had elevated fasting glucose. Pregnancies complicated by New-GDM had higher frequencies of pregnancy-induced hypertension (13.3% vs 4.1%, p = 0.002), large-for-gestational-age infants (22.2% vs 9.9%, p = 0.004), neonatal hypoglycaemia (8.9% vs 1.9%, p = 0.004) and neonatal intensive care unit admission (16.7% vs 5.8%, p = 0.002) compared to pregnancies without GDM.ConclusionsGDM prevalence increased tenfold when applying WHO2013 criteria in a Danish population, mainly driven by higher fasting glucose levels. Untreated GDM in the gap between the current Danish and the WHO2013 diagnostic criteria resulted in higher risks of adverse pregnancy outcomes.

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