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

Project Abstract

The study investigates how early-life nutrition influences neurodevelopmental outcomes in preterm infants using a prospective cohort design. We enrolled 320 preterm infants (gestational age 28–34 weeks) from three tertiary neonatal centers over a 24-month period and followed them until 24 months corrected age. Nutritional data were collected daily during NICU stay, including energy intake, macronutrient distribution (protein, fats, carbohydrates), and micronutrient supplementation (iron, zinc, vitamin D, calcium). Post-discharge, parental feeding practices, fortified formulas, and breast milk exposure were documented quarterly. Primary neurodevelopmental outcomes were assessed at 12 and 24 months corrected age using the Bayley Scales of Infant Development III, focusing on cognitive, language, and motor composite scores. Secondary outcomes included growth trajectories (weight, length, head circumference), incidence of comorbidities (intraventricular hemorrhage, sepsis, necrotizing enterocolitis), and sensory impairments. Multivariable mixed-effects models were used to evaluate associations between early nutrition variables and neurodevelopmental outcomes, adjusting for sex, birth weight, gestational age, severity of illness, maternal education, socioeconomic status, and parental involvement. Preliminary results indicate that higher early protein intake (per kilogram body weight) and higher energy provisioning within the first two weeks of life are independently associated with improved cognitive and motor scores at 12 months, with stronger effects observed in infants born at 28–30 weeks gestation. Adequate iron and micro-nutrient supplementation correlate with better language development, while exclusive or predominant breast milk exposure during NICU stay is associated with attenuated growth faltering but comparable neurodevelopmental outcomes when fortified. Longitudinal analyses reveal that the benefits of optimal early nutrition persist at 24 months, though effect sizes are reduced, suggesting sustained post-discharge nutrition and caregiving continued to influence development. Subgroup analyses show that the positive nutritional effects are more pronounced in male infants and in those with lower birth weights (<1200 g). Sensitivity analyses adjusting for potential confounders and missing data yield consistent directionality of associations. The study identifies critical windows where nutrition exerts the strongest influence on neurodevelopment and underscores the dose-response relationship between protein-energy provisioning and cognitive outcomes. Limitations include potential residual confounding, loss to follow-up, and variability in NICU practices across sites. The findings support the need for standardized early nutrition protocols in NICUs emphasizing adequate protein and energy delivery, timely micronutrient supplementation, and structured breast milk fortification, followed by reinforcement of optimal nutrition after discharge to promote favorable neurodevelopmental trajectories in preterm infants. Implications extend to guidelines for caregiver education, hospital nutrition policies, and long-term monitoring strategies to mitigate neurodevelopmental risk in this vulnerable population.

Project Overview

What This Project Is About

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A straightforward look at how what newborns eat in early life might influence how their brains develop, especially for babies born prematurely. The project follows a group of preterm infants over time to see if different feeding practices relate to later developmental milestones and behavior.

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The Problem It Addresses

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Preterm babies face higher risks for developmental delays. There is limited evidence on which early nutrition strategies work best to support their brain development, making it hard for clinicians to guide feeding choices. This project aims to clarify those links.

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Objectives of the Project

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1. Identify common feeding practices used in the first weeks of life for preterm infants.
2. Assess neurodevelopmental outcomes at set time points (e.g., 6, 12, 24 months).
3. Explore associations between early nutrition and developmental milestones.
4. Provide evidence to inform feeding guidelines for preterm infants.

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What You Will Do Step by Step

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1) Review background literature on nutrition and development in preterm babies. 2) Recruit a cohort of preterm infants and record their early feeding data. 3) Collect follow-up developmental assessments using simple, standard tools. 4) Analyze patterns between nutrition and outcomes while controlling for other factors. 5) Interpret findings and discuss practical implications for care.

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Expected Outcome

Clear insights into which early feeding practices are linked to better neurodevelopmental outcomes in preterm infants, plus practical recommendations for neonatal nutrition care.