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Updated: Nov 9, 2025

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Neonatal hyperglycaemia is associated with worse neurodevelopmental outcomes in extremely preterm infants
Itay Zamir1, Elisabeth Stoltz Sjöström2, Fredrik Ahlsson3
1Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden itay.zamir@umu.se.
Insights
Neonatal hyperglycemia in extremely preterm infants is linked to poorer long-term cognitive and motor outcomes. Insulin treatment did not impact these neurodevelopmental results, highlighting the need for further research.
Area of Science:
- Neonatalogy
- Pediatric Neurology
- Developmental Pediatrics
Background:
- Extremely preterm infants (<27 weeks gestation) face significant neurodevelopmental challenges.
- Neonatal hyperglycemia is a common complication in this vulnerable population.
Purpose of the Study:
- To investigate the association between neonatal hyperglycemia and long-term neurodevelopmental outcomes in extremely preterm infants.
- To evaluate the impact of insulin treatment on these outcomes.
Main Methods:
- An observational national cohort study (Extremely Preterm Infants in Sweden Study) included 533 infants born <27 weeks gestation.
- Neurodevelopmental assessments, including cognitive (WISC-IV) and motor (MABC-2) functions, were performed at 6.5 years of age for 436 survivors.
Main Results:
- Each day of neonatal hyperglycemia (>8 mmol/L) was associated with a decrease in Full Scale Intelligence Quotient (FSIQ) and Movement Assessment Battery for Children 2 (MABC-2) total scores.
- Persistent hyperglycemia (≥3 consecutive days) correlated with significantly lower MABC-2 scores.
- Insulin treatment showed no association with any assessed neurodevelopmental outcomes.
Conclusions:
- Neonatal hyperglycemia is a significant risk factor for impaired cognitive and motor development in extremely preterm children.
- Current insulin treatment strategies do not appear to mitigate these adverse neurodevelopmental effects.
- Further randomized controlled trials are essential to determine optimal management of neonatal hyperglycemia in extremely preterm infants.
Objective:
To assess the associations between neonatal hyperglycaemia and insulin treatment, versus long-term neurodevelopmental outcomes in children born extremely preterm.
Design And Setting:
Observational national cohort study (Extremely Preterm Infants in Sweden Study) using prospectively and retrospectively collected data. Neurodevelopmental assessment was performed at 6.5 years of age.
Patients:
533 infants born <27 gestational weeks during 2004-2007; 436 survivors were assessed at 6.5 years.
Outcome Measures:
Neurodevelopmental disability (NDD), survival without moderate to severe NDD, Wechsler Intelligence Scale for Children IV Full scale intelligence quotient (WISC-IV FSIQ) and Movement Assessment Battery for Children 2 (MABC-2) total score.
Results:
Duration of neonatal hyperglycaemia >8 mmol/L was associated with WISC-IV scores-for each day with hyperglycaemia there was a decrease of 0.33 points (95% CI 0.03 to 0.62) in FSIQ. Neonatal hyperglycaemia >8 mmol/L occurring on 3 consecutive days was associated with lower MABC-2 scores (adjusted mean difference: -4.90; 95% CI -8.90 to -0.89). For each day with hyperglycaemia >8 mmol/L, there was a decrease of 0.55 points (95% CI 0.17 to 0.93) in MABC-2 total score. Insulin treatment was not associated with any of the outcome measures.
Conclusion:
Neonatal hyperglycaemia >8 mmol/L was associated with lower intelligence scores and worse motor outcomes at 6.5 years of age. Insulin treatment was not associated with either worsened or improved neurodevelopmental outcomes. Randomised controlled trials are needed to clarify the role of insulin in treating hyperglycaemia in extremely preterm infants.
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