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Published on: June 29, 2013
Extrauterine growth restriction definitions and associated factors among Colombian preterm infants: a case control
Adriana Montealegre-Pomar1,2, Nathalie Charpak3, Martín Alonso Rondón Sepúlveda4
1Department of Clinical Epidemiology and Biostatistics, PhD(c), Program in Clinical Epidemiology, Pontificia Universidad Javeriana, Bogotá, Colombia. montealegre.a@javeriana.edu.co.
Insights
Extrauterine growth restriction (EUGR) affects 30-40% of preterm infants. Standardizing EUGR definitions is crucial for optimizing nutritional support and improving neurodevelopmental outcomes in vulnerable newborns.
Area of Science:
- Neonatalogy
- Pediatric Nutrition
- Growth Monitoring
Background:
- Extrauterine growth restriction (EUGR) is prevalent in preterm infants, potentially impacting neurodevelopment.
- Lack of a standardized definition hinders early identification and intervention for EUGR.
- This study addresses the agreement and associated factors of EUGR using distinct definitions.
Purpose of the Study:
- To evaluate the agreement between cross-sectional and longitudinal definitions of EUGR.
- To identify maternal, perinatal, and nutritional factors associated with EUGR.
- To inform the standardization of EUGR definitions for improved infant care.
Main Methods:
- A matched case-control study was conducted across three kangaroo mother care programs.
- EUGR was assessed using both cross-sectional and longitudinal definitions.
- Conditional logistic regression analyzed factors linked to EUGR, including insurance, feeding, and hospitalization duration.
Main Results:
- Agreement between EUGR definitions was fair (κ=0.32).
- Factors like health insurance and longer hospital stays correlated with higher EUGR odds, while formula feeding showed protective effects.
- Parenteral nutrition, delayed recovery, and NICU stay increased EUGR risk, whereas kangaroo care hours reduced it.
Conclusions:
- Significant differences exist between cross-sectional and longitudinal EUGR definitions regarding associated factors.
- A standardized EUGR definition is necessary for optimizing nutritional support and individualizing care for preterm infants.
- This research provides crucial insights for developing context-specific nutritional protocols and enhancing growth monitoring in neonatal settings.
Background:
Extrauterine growth restriction (EUGR) is common in preterm infants and may impair neurodevelopment. The absence of a standardized definition limits early identification. We evaluated agreement and factors associated with EUGR using cross-sectional and longitudinal definitions.
Methods:
Matched case-control study in three kangaroo mother care programs. EUGR was defined cross-sectionally and longitudinally. Cases were matched by gestational age and city (1:2 cross-sectional; 1:1 longitudinal). Conditional logistic regression assessed associations with maternal, perinatal, and nutritional factors.
Results:
We included 221 cross-sectional cases with 442 controls and 287 longitudinal cases with 287 controls. Agreement between definitions was fair (κ = 0.32). For both definitions, enrollment in workers' health insurance and longer hospital stay were associated with higher EUGR odds, whereas any formula feeding was associated with lower odds. Among infants receiving parenteral nutrition, delayed weight recovery and longer hospitalization increased EUGR odds, while higher carbohydrate intake and exclusive formula feeding reduced it. In the longitudinal model, neonatal intensive care unit stay and patent ductus arteriosus increased odds, whereas more hours in kangaroo position reduced it.
Conclusions:
Poor agreement between EUGR definitions and differences in associated factors underscore the need to standardize EUGR definitions to optimize and individualize enteral and parenteral nutritional support.
Impact:
This multicenter study shows that 30-40% of Colombian preterm infants <35 weeks GA develop EUGR, with the longitudinal definition capturing earlier growth faltering and the cross-sectional one more severe and persistent failure. Poor concordance between cross-sectional and longitudinal EUGR definitions and differences in associated factors highlight the need for a standardized EUGR definition and for optimized, individualized enteral and parenteral nutritional support in preterm infants. By contrasting EUGR definitions and identifying modifiable factors, this study adds novel evidence from a middle-income setting. Its impact is to guide context-specific nutritional protocols and strengthen early growth monitoring in neonatal care.
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