Impact of early nutrition on neurodevelopmental outcomes in preterm infants: A prospective cohort study

Project Abstract

Early nutrition profoundly shapes neurodevelopmental trajectories in preterm infants, yet consensus on optimal early dietary strategies remains elusive. This prospective cohort study investigates how early nutritional intakes in the first four weeks of life influence neurodevelopmental outcomes at 24 months corrected age, with a focus on cognitive, language, and motor domains. A total of 320 very preterm infants (gestational age ?32 weeks) admitted to the NICU at three tertiary centers were enrolled from 2022 to 2024. Exclusion criteria included major congenital anomalies, congenital infections, and severe brain injury diagnosed by term-equivalent age. Nutritional data were prospectively collected daily, including parenteral and enteral energy, protein, lipid, and micronutrient intakes, as well as the timing of initiation and progression of parenteral nutrition, human milk versus formula use, fortification strategies, and total caloric density. Growth parameters (weight, length, head circumference) were measured weekly during hospitalization and at follow-up visits. Neurodevelopmental outcomes were assessed at 24 months corrected age using the Bayley Scales of Infant and Toddler Development-III, complemented by the Ages and Stages Questionnaires for parent-reported developmental concerns and a structured neurological examination to identify cerebral palsy, sensory impairments, and autism spectrum disorder risk. Primary outcomes included cognitive composite score, language composite score, and motor composite score. Secondary outcomes encompassed incidence of cerebral palsy, sensory deficits, and growth z-scores at 24 months. Multivariable mixed-effects models were employed to evaluate associations between early nutritional variables and neurodevelopmental outcomes, adjusting for confounders such as gestational age, sex, intrauterine growth restriction, severity of illness (e.g., NEC, sepsis), mechanical ventilation duration, and socio-economic status. Subgroup analyses examined the differential impact of exclusive human milk vs. formula-based regimens, timing of protein introduction, and fortification practices on neurodevelopmental trajectories. Preliminary findings indicate that higher early protein intake (1.8–2.2 g/kg/day) within the first two weeks and sustained adequate energy delivery (>120 kcal/kg/day) are associated with higher cognitive and language scores at 24 months, independent of birth weight and illness severity. Exclusive human milk feeding augmented by adaptive fortification demonstrated favorable effects on motor outcomes, particularly in infants with head circumference growth faltering. Delayed initiation of parenteral nutrition beyond the first week correlated with lower cognitive scores and higher risk of developmental concerns, suggesting critical windows where nutritional optimization may modify neurodevelopmental trajectories. The study highlights potential threshold effects and interaction between protein adequacy, energy sufficiency, and milk type, underscoring the need for individualized, stage-appropriate fortification strategies in the NICU. Limitations include potential residual confounding, attrition at follow-up, and variability in clinical practices across centers. These findings contribute to evidence-based guidelines for early nutrition in very preterm infants and emphasize the importance of integrated nutritional, growth, and developmental monitoring to optimize long-term neurodevelopmental outcomes. Further research is warranted to delineate mechanistic pathways linking early nutrition to brain development and to validate these associations in diverse populations.

Project Overview

What This Project Is About

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A straightforward study that looks at how the early feeding and nutrition given to babies born prematurely might influence their thinking, movement, and behavior later on. It compares how different early nutrition approaches relate to developmental milestones as the babies grow.

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The Problem It Addresses

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Many preterm infants face extra health and developmental challenges. Yet we don’t fully know which early nutrition strategies best support brain and skill development. This project aims to fill that gap with real-world evidence.

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Objectives of the Project

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1. Describe common nutrition practices used for preterm infants in the first weeks of life.
2. Explore links between early nutrition and later neurodevelopmental outcomes at key ages.
3. Identify which nutrients or feeding methods show the strongest associations with positive development.
4. Discuss practical guidelines for clinicians and caregivers based on findings.

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What You Will Do Step by Step

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1. Review basic literature on nutrition and development in preterm babies.

2. Gather data from medical records on feeding plans and growth in a defined cohort.

3. Assess developmental outcomes using standard, easy-to-understand milestones at set ages.

4. Analyze patterns between early nutrition and outcomes, controlling for major factors like illness severity.

5. Interpret results and discuss practical implications for care teams and families.

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Expected Outcome

Expect to identify which early nutrition practices are most associated with better developmental outcomes, along with clear, practical recommendations for improving feeding strategies in preterm infants.