Formula Feeding Is Independently Associated With Acute Kidney Injury in Very Low Birth Weight Infants: A Pre-Post Cohort Analysis

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Abstract

Background:

Successful strategies to prevent neonatal acute kidney injury are lacking. Nevertheless, it is well known that in breastfed babies the excretory needs of the kidney are low because the intake of most nutrients is just above the nutritional requirement.

Objectives:

This study aimed to determine whether feeding type predicts acute kidney injury in the very low birth weight infant.

Methods:

One hundred and eighty-six infants were enrolled in this pre-post cohort study (114 infants were included in the only human milk-fed group and 72 in the formula-fed group). Routine biological markers of acute kidney injury were collected in both groups from birth to discharge.

Results:

Compared with formula feeding, human milk feeding was associated with almost 80% lower odds of acute kidney injury (odds ratio [OR] = 0.2; 95% confidence interval [CI], 0.05-0.77). After confounding variables had been controlled for, formula feeding was independently associated with acute kidney injury in very low birth weight infants.

Conclusion:

The study showed that, at our institution, acute kidney injury in the neonatal period is frequently associated with the avoidable procedure of formula feeding. Further prospective multicenter studies are needed to determine the generality of this association.

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