Related Experiment Video
Updated: Jun 18, 2026

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Neurodevelopmental outcome of extremely low birth weight infants from the Vermont Oxford network: 1998-2003
Charles E Mercier1, Michael S Dunn, Karla R Ferrelli
1Department of Pediatrics, University of Vermont, USA. charles.mercier@vtmednet.org
Insights
Extremely low birth weight (ELBW) infants face a high risk of severe disability, with 34% affected in this study. Outcomes varied significantly across follow-up centers, highlighting the need for more research and resources.
Area of Science:
- Neonatal Medicine
- Developmental Pediatrics
- Clinical Epidemiology
Background:
- Significant uncertainty exists in care decisions for extremely low birth weight (ELBW) infants.
- Published outcome data often comes from specialized centers and may not represent diverse settings.
- Accurate outcome prediction requires combining local data with published estimates.
Purpose of the Study:
- To assess the neurodevelopmental outcomes of ELBW infants.
- To identify factors associated with severe disability in ELBW infants.
- To evaluate outcomes across multiple centers within the Vermont Oxford Network (VON).
Main Methods:
- Follow-up data collected at 18-24 months corrected age for ELBW infants (401-1,000g).
- Data gathered from 33 North American VON centers between July 1998 and December 2003.
- Logistic regression analysis used to identify predictors of severe disability.
Main Results:
- Of 6,198 surviving ELBW infants, 3,567 (58.4%) were evaluated at follow-up.
- Severe disability was present in 34% of assessed infants.
- Cystic periventricular leukomalacia, congenital malformations, and severe intraventricular hemorrhage were strongly linked to severe disability.
Conclusions:
- ELBW infants who complete follow-up evaluations demonstrate a high risk for severe disability.
- Significant variations in patient attrition rates were observed among participating follow-up clinics.
- Additional resources are necessary to investigate the impact of follow-up care on ELBW infant outcomes.
Background:
Physicians and parents face significant uncertainties when making care decisions for extremely low birth weight (ELBW) infants. Many published estimates of death and developmental outcome are from well-funded university programs and may not reflect outcomes of infants from a variety of settings. The best estimates of the probabilities of death and severe disability combine local experience and published data.
Objective:
To describe the neurodevelopmental outcome of ELBW infants from centers of the ELBW Infant Follow-Up Group of the Vermont Oxford Network (VON) and to identify characteristics associated with severe disability.
Methods:
Predefined measures of living situation, health and developmental outcome were collected at 18-24 months' corrected age for infants born from July 1, 1998 to December 31, 2003 with birth weights of 401-1,000 g at 33 North American VON centers. Logistic regression was used to identify characteristics associated with severe disability.
Results:
6,198 ELBW infants were born and survived until hospital discharge; by the time of follow-up, 88 infants (1.4%) had died. Of the remaining 6,110 infants, 3,567 (58.4%) were evaluated. Severe disability occurred in 34% of the assessed infants. Multivariate logistic regression suggested cystic periventricular leukomalacia, congenital malformation and severe intraventricular hemorrhage were the characteristics most highly associated with severe disability. There were marked variations among the follow-up clinics in the attrition rate.
Conclusion:
ELBW infants completing evaluation were at a high risk for severe disability. There are considerable differences among participating centers in attrition at follow-up. Further resources will be needed to study the effect of follow-up care for this group of infants.
More Related Videos
Related Concept Videos
Teratogenicity
Drug Dosing: Infants and Children
Socioemotional Development during Infancy
Primary Temperament Types
Stella Chess...
Longitudinal Studies

