Intrauterine exposure to gestational diabetes, child adiposity, and blood pressure

Area of Science:

• Pediatric Health
• Endocrinology
• Public Health

Background:

• Intrauterine exposure to gestational diabetes mellitus (GDM) is linked to offspring obesity and elevated systolic blood pressure (SBP) in adolescence.
• Research on GDM's effects on adiposity and SBP in younger children is limited.
• This study investigates the association between maternal glucose tolerance and offspring adiposity/SBP at age 3.

Purpose of the Study:

• To examine the relationship between maternal glucose tolerance during pregnancy and offspring adiposity and SBP at age 3.
• To assess if GDM exposure in utero influences early childhood body composition and cardiovascular markers.

Main Methods:

• A prospective prebirth cohort study (Project Viva) involving 1,238 mother-child pairs.
• Maternal blood glucose levels and GDM diagnosis via oral glucose tolerance test were assessed.
• Child outcomes included BMI z-score, sum and ratio of skinfold thicknesses (subscapular and tricep), and SBP at age 3, analyzed using adjusted multivariable models.

Main Results:

• Children exposed to GDM exhibited higher SBP (3.2 mm Hg) and greater adiposity (sum of skinfolds: 1.31 mm).
• No significant association was found between GDM exposure and BMI z-score.
• The link between GDM and SBP was attenuated and became non-significant after adjusting for skinfold thickness, suggesting mediation by adiposity.

Conclusions:

• GDM exposure in utero is associated with increased adiposity in 3-year-old children.
• Adiposity may mediate the higher SBP observed in children exposed to GDM.
• These findings extend the understanding of GDM's adverse effects to early childhood.