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Transient hypothyroxinaemia associated with developmental delay in very preterm infants
W J Meijer1, S P Verloove-Vanhorick, R Brand
1TNO Institute of Preventive Health Care, Leiden, The Netherlands.
Archives of Disease in Childhood
|July 1, 1992
Summary
Low neonatal thyroxine levels in very preterm infants are linked to poorer psychomotor development at two years. This suggests transient hypothyroxinaemia (low thyroid hormone) in preterm babies may not be harmless.
Area of Science:
- Neonatal Medicine
- Developmental Pediatrics
- Endocrinology
Background:
- Preterm infants often experience transient hypothyroxinaemia.
- The impact of this condition on long-term neurodevelopment is debated.
- Understanding thyroid hormone's role is crucial for preterm infant care.
Purpose of the Study:
- To investigate the association between neonatal thyroxine levels and psychomotor development at corrected age of 2 years.
- To determine if transient hypothyroxinaemia in preterm infants has lasting effects on development.
Main Methods:
- Study included 563 very preterm infants (<32 weeks gestational age) and/or very low birthweight (<1500 g).
- Neonatal thyroxine concentrations were measured shortly after birth.
- Psychomotor development was assessed at 2 years corrected age using standardized milestones.
Main Results:
- A significant association was observed between low neonatal thyroxine concentrations and negative scores on developmental milestones.
- Infants with lower thyroxine levels showed poorer psychomotor development outcomes.
- The findings indicate a potential detrimental effect of low neonatal thyroxine.
Conclusions:
- Transient hypothyroxinaemia in preterm infants is not necessarily harmless.
- Neonatal thyroxine levels may be an important predictor of later psychomotor development.
- Further research is warranted to explore interventions for thyroid hormone management in preterm infants.