ArticleEarly human development2025
Heart rate variability is associated with self-regulation and stress neurobehavior in preterm infants.
Article in Early human development, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Regulation of Stress Physiology Across Social Contexts in Preterm-Born Preschoolers.Psychophysiology · 2026Article
- Music-based research in neonatal intensive care units requires guidelines grounded in developmental neurology and responsive to the individual needs of preterm infants.Frontiers in psychology · 2026Article
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6 authors.
Funding
Abstract
backgroundThe NICU (neonatal intensive care unit) Network Neurobehavioral Scale (NNNS) quantitatively assesses several distinct neurobehavioral domains. Neurobehavioral states interface with the autonomic nervous system. We sought to determine if autonomic tone, measured by heart rate variability (HRV), is associated with performance on NNNS neurobehavioral subscales.
methodsUsing continuous electrocardiogram recordings, we derived the following HRV measures: short (α1), and long-term (α2) fractal scaling exponents and short (RMS1) and long-term (RMS2) root mean square fluctuations. The NNNS was completed around term equivalent age (TEA). Linear mixed effects models tested associations between six NNNS subscales and HRV metrics. Secondary analyses explored the role of postmenstrual age (PMA) on associations between NNNS and HRV. These associations were further tested in the earliest and latest postnatal NICU weeks for each infant.
resultsWe enrolled 39 premature infants (birth gestational age 23-36 weeks). Several HRV metrics were associated with Self-Regulation and Stress. After controlling for common NICU exposures (i.e. ventilation, steroids, caffeine and antibiotics), self-regulation was positively associated with alpha1 and RMS1 (standardized β = 0.262-0.284). Stress was associated negatively with alpha1 and RMS1 (standardized β = -0.283 to -0.286) and positively with alpha2 (standardized β = 0.245). Associations between Self-Regulation and Stress on RMS1 differed by PMA and NICU week, respectively. α1 and α2 at TEA predicted Stress (AUC = 0.730-0.775).
conclusionOf the six subscales examined, only Stress and Self-Regulation scores were associated with autonomic metrics in preterm infants. For short-term autonomic fluctuations, PMA and NICU week influenced this relationship. Furthermore, the fractal scaling exponents predict abnormal Stress scores.
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