Weight gain in infancy is associated with carotid extra-medial thickness in later childhood.

Objective: Early life is an important period for determining future risk of cardiovascular disease. Carotid extra-medial thickness is a novel noninvasive measure that estimates arterial adventitial thickness, information concerning vascular health not captured by assessment of arterial intima-media thickness alone. We sought to determine whether fetal growth and early postnatal growth are associated with carotid extra-medial thickness in 8 year old children.

Methods: Carotid extra-medial thickness was assessed by high-resolution ultrasound in 379 non-diabetic children aged 8-years, with complete data for birth weight, gestational age, early postnatal weight gain and carotid extra-medial thickness.

Results: Weight gain during infancy, from birth to 18 months of age, was significantly and positively associated with carotid EMT (11 μm per kg length-adjusted weight gain [95% CI 3, 18], P=0.007). This association was significantly stronger in boys than girls (Pheterogeneity=0.005). By contrast, there was no significant association between birth weight and carotid EMT (6 μm/kg birth weight [95% CI -12, 24], P=0.51).

Conclusion: Excessive weight gain during infancy is associated with increased carotid extra-medial thickness, indicating that the alterations to the vasculature associated with excessive early postnatal growth likely include arterial adventitial thickening.