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Emerging developmental sequelae in the 'normal' extremely low birth weight infant
M F Collin1, C L Halsey, C L Anderson
1Department of Pediatrics, Loyola University Medical Center, Maywood, Illinois.
Insights
Extremely low birth weight infants often show normal development initially but frequently experience developmental declines by early childhood. This highlights the need for ongoing monitoring of neurodevelopmental outcomes in this vulnerable population.
Area of Science:
- Neonatalogy
- Developmental Pediatrics
- Neuroscience
Background:
- Extremely low birth weight (ELBW) infants face significant risks for adverse neurodevelopmental outcomes.
- Major complications like bronchopulmonary dysplasia (BPD) and severe intracranial hemorrhage (ICH) are associated with poorer development in ELBW survivors.
Purpose of the Study:
- To assess neurodevelopmental trajectories in ELBW children from infancy to early childhood.
- To determine if initial normal infant development predicts sustained development in ELBW children.
- To compare developmental changes between high-risk and low-risk ELBW groups.
Main Methods:
- Longitudinal neurodevelopmental testing and neuromotor examinations were performed on 36 ELBW children at two time points (infancy and early childhood).
- Children were stratified into high-risk (presence of BPD and/or Grade III-IV ICH) and low-risk groups.
- Standardized developmental assessments were utilized.
Main Results:
- Two-thirds (67%) of ELBW infants demonstrated normal development in infancy.
- A significant decline was observed, with only 31% maintaining normal development by early childhood (P < .005).
- Developmental deterioration occurred in both high-risk and low-risk groups, indicating ELBW itself is a risk factor.
Conclusions:
- Normal infant development in ELBW children is not a reliable predictor of later developmental status.
- ELBW children, irrespective of major complications, are at substantial risk for emerging and persistent developmental challenges.
- Continuous neurodevelopmental surveillance is crucial for ELBW survivors to identify and manage age-related issues.
Abstract:
Thirty-six extremely low birth weight (less than 1000 g birth weight) children received neurodevelopmental testing in infancy (mean age = 19.1 months), and again in early childhood (mean age = 46.5 months). Children were categorized into a high-risk group (n = 20) if bronchopulmonary dysplasia and/or Grades III or IV intracranial hemorrhage were present or a low-risk group (n = 16) if neither were present. Using standardized testing and neuromotor examination, 24 (67%) of 36 children showed normal infant development. Only 11 (31%) of 36 children (P less than .005) had normal development upon reassessment in early childhood. A decline in developmental status occurred in both groups. This indicates that for the extremely low birth weight population, normal infant development is poorly predictive of continued normal development. With or without major complications, extremely low birth weight places children at substantial risk for ongoing and emerging developmental problems with age.