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A shift to a one-step screening for gestational diabetes mellitus (GDM) increased GDM diagnoses by 41%. This change did not lead to improved maternal or neonatal outcomes in pregnant individuals.

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Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Public Health

Background:

  • Screening protocols for gestational diabetes mellitus (GDM) have evolved, with a shift from two-step to one-step approaches.
  • Understanding the impact of these guideline changes on perinatal outcomes is crucial for optimizing maternal and infant care.

Purpose of the Study:

  • To evaluate the effect of transitioning from a two-step to a one-step screening strategy for GDM on various perinatal outcomes.
  • To compare the incidence of GDM diagnoses and associated maternal and neonatal complications before and after the guideline change.

Main Methods:

  • A before-and-after cohort study design was employed using electronic health data and linked birth certificates.
  • Outcomes were compared between women receiving prenatal care from internal providers (exposed to guideline change) and external providers (control group) from January 2009 to December 2014.
  • Adjusted relative risks and 95% confidence intervals were calculated using Poisson generalized estimating equations.

Main Results:

  • The adoption of the one-step approach was associated with a 41% increase in GDM diagnosis.
  • Key outcomes including GDM incidence, labor induction, neonatal hypoglycemia, and nonstress testing showed significant increases post-guideline change.
  • No significant associations were found with cesarean delivery or macrosomia rates.

Conclusions:

  • The implementation of a one-step screening approach for GDM led to a substantial rise in diagnoses.
  • This guideline change was linked to increased rates of labor induction and neonatal hypoglycemia without demonstrable improvements in maternal or neonatal health.
  • Further research may be needed to refine GDM screening and management strategies.