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Updated: May 22, 2025

Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
Relationships Between NICU Infant Stressors and Childhood Behavior and Development
Amy L D'Agata1, Jennifer S Miller, Ji Youn Yoo
1Author Affiliations: College of Nursing, University of Rhode Island, Providence, Rhode Island (Dr D'Agata); and College of Nursing, University of Tennessee, Knoxville, Tennessee (Drs Miller, Yoo, and Groer, and Ms Springer).
Insights
Neonatal intensive care unit (NICU) stress in preterm infants is linked to later behavioral and neurodevelopmental outcomes. Reducing NICU stress and providing developmental support are crucial for improving long-term health.
Area of Science:
- Neonatal intensive care
- Developmental psychology
- Pediatric neurology
Background:
- Preterm infants experience significant stress in the NICU.
- NICU stressors may impact critical brain development.
- This exposure can lead to long-term neurodevelopmental effects.
Purpose of the Study:
- To investigate the association between NICU stressor exposure and neurodevelopmental outcomes at four years of age in preterm infants.
- To analyze relationships between stressor scores and childhood behavior and development.
Main Methods:
- The Neonatal Infant Stress Scale (NISS) measured daily stress events in 83 preterm infants during the first six weeks.
- Twenty-five children were assessed at four years using the Child Behavior Checklist (CBCL) and Battelle Developmental Index-Screening Test (BDI-2 ST).
Main Results:
- Cumulative NISS scores correlated with CBCL and BDI-2 ST in unadjusted models.
- Gestational age and time to enteral feeding were associated with CBCL scores.
- Score for Neonatal Physiology with Perinatal Extension (SNAPPE-II) was associated with BDI-2 ST scales.
- Hierarchical regressions indicated relationships between NISS and both scales, influenced by GA, SNAPPE-II, and feeding duration.
Conclusions:
- The quantity and type of neonatal stress may influence neurodevelopmental outcomes at four years.
- Larger studies are needed to confirm these findings.
- Clinical practice should focus on minimizing NICU stress and offering developmental support to these children.
Background:
Preterm infants face many stressful experiences in the neonatal intensive care unit (NICU). Critical aspects of brain growth and development may be affected by stressor exposure. Longer term neurodevelopmental effects may result.
Purpose:
The aims were to examine relationships between NICU stressor scores and childhood behavior and neurodevelopment at 4 years of age in a cohort of preterm infants.
Methods:
We measured daily stress events with the Neonatal Infant Stress Scale (NISS) in 83 preterm infants over the first 6 weeks of life. Twenty-five of these children were followed up at 4 years of age the Child Behavior Checklist (CBCL) and the Battelle Developmental Index-Screening Test (BDI-2 ST).
Results:
The cumulative NISS score was significantly correlated with both childhood scales in unadjusted models, but the CBCL and BDI-2 ST were not correlated with each other, suggesting they measured different constructs. Gestational age (GA) and time until full enteral feeding were the only consistent infant variables significantly associated with the CBCL scales and were selected as covariates in the regression models. Only the Score for Neonatal Physiology with Perinatal Extension (SNAPPE-II) was significantly associated with the BDI-2 ST personal-social, motor, communication, and total scales and was selected as the covariate in the regression models. Hierarchical regressions on CBCL internalizing, externalizing, and total behavior scores and BDI-2 ST scales showed relationships between the NISS and both scales, but other factors influenced these relationships, including GA, SNAPPE-II, and length of time to enteral feeding.
Implications For Practice And Research:
The amount and nature of neonatal stress may have impacts on neurodevelopment at 4 years of age. Limitations were the small sample size. Further larger studies of neonatal stress and neurodevelopment are warranted. Practice implications would be to ensure efforts to reduce unnecessary stress during the NICU stay and to provide developmental support as these children grow.
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