Improving the Accuracy of Newborn Weight Classification

Area of Science:

• Neonatalogy
• Pediatric Growth Standards
• Quality Improvement Science

Background:

• Accurate classification of newborn weight for gestational age is crucial for identifying infants at risk for adverse outcomes.
• The Lubchenco growth reference is widely used but may not accurately reflect current infant populations.
• Updated growth references are needed to improve the identification of small for gestational age (SGA) and large for gestational age (LGA) infants.

Purpose of the Study:

• To enhance the accuracy of newborn weight classification using the Olsen regional growth reference compared to the Lubchenco reference.
• To determine the impact of using updated growth references on SGA, appropriate for gestational age (AGA), and LGA classifications in term infants.

Main Methods:

• Quality improvement methods guided by Lewin's Change Theory were employed.
• Term infants (N=314) at an academic medical center were evaluated using Lubchenco and other preferred growth references.
• Nursing and provider staff received education on the new growth reference interpretation.

Main Results:

• The Olsen regional growth reference identified more infants as small for gestational age (SGA) and fewer as large for gestational age (LGA).
• Post hoc analysis using the Fenton global growth reference yielded similar results, identifying more SGA and fewer LGA infants.
• No statistically significant difference was observed between the Olsen and Fenton growth references.

Conclusions:

• Updated growth references, such as Olsen and Fenton, provide more accurate infant weight-for-gestational age classification than the Lubchenco reference.
• Improved classification may lead to better identification and management of at-risk newborns.
• This practice change has the potential to decrease newborn health risks, including hypoglycemia.