Levels of Neonatal Thyroid Hormone in Preterm Infants and Neurodevelopmental Outcome at 5½ Years: Millennium Cohort Study

Abstract

Our findings do not support the view that the hypothyroxinemic state, in the context of this analysis, is harmless in preterm infants. Many factors contribute both to the etiology of hypothyroxinemia and neurodevelopment; strategies for correction of hypothyroxinemia should acknowledge its complex etiology and not rely solely on one approach.