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Prediction of hyperglycemia in preterm newborn infants
1Santa Catarina Hospital, São Paulo-Nursery, Department of Pediatrics, Brazil.
Insights
Hyperglycemia is common in preterm infants receiving glucose infusions. Gestational age, glucose infusion rate, and clinical status significantly predict its occurrence, aiding in early intervention for carbohydrate homeostasis.
Area of Science:
- Neonatology
- Pediatric Endocrinology
- Metabolic Disorders
Background:
- Preterm neonates exhibit heightened susceptibility to carbohydrate homeostasis disruptions.
- Hyperglycemia in this population is linked to various adverse conditions.
Purpose of the Study:
- To assess the incidence of hyperglycemia in preterm infants during their first week of life.
- To identify key predictive variables for hyperglycemia in this vulnerable group.
Main Methods:
- Prospective study of 40 preterm neonates (<37 weeks gestational age).
- Collected 511 glycemic status determinations, analyzing gestational age, birth weight, glucose infusion rate, and clinical stability.
- Employed a case-control study with logistic regression for predictive modeling.
Main Results:
- Identified 59 episodes (11.5%) of hyperglycemia.
- Developed a predictive model incorporating gestational age, glucose infusion rate, and clinical status.
- Gestational age, glucose infusion rate, and clinical status were significant predictors, in increasing order of importance.
Conclusions:
- Hyperglycemia is a notable concern in preterm neonates receiving glucose infusions.
- The established predictive model can aid in identifying infants at higher risk.
- Monitoring these key variables allows for timely management of glucose metabolism in preterm infants.
Abstract:
Many conditions are associated with hyperglycemia in preterm neonates because they are very susceptible to changes in carbohydrate homeostasis. The purpose of this study was to evaluate the occurrence of hyperglycemia in preterm infants undergoing glucose infusion during the first week of life, and to enumerate the main variables predictive of hyperglycemia. This prospective study (during 1994) included 40 preterm neonates (gestational age < 37 weeks); 511 determinations of glycemic status were made in these infants (average 12.8/infant), classified by gestational age, birth weight, glucose infusion rate and clinical status at the time of determination (based on clinical and laboratory parameters). The clinical status was classified as stable or unstable, as an indication of the stability or instability of the mechanisms governing glucose homeostasis at the time of determination of blood glucose; 59 episodes of hyperglycemia (11.5%) were identified. A case-control study was used (case = hyperglycemia; control = normoglycemia) to derive a model for predicting glycemia. The risk factors considered were gestational age (< or = 31 vs. > 31 weeks), birth weight (< or = 1500 vs. > 1500 g), glucose infusion rate (< or = 6 vs. > 6 mg/kg/min) and clinical status (stable vs. unstable). Multivariate analysis by logistic regression gave the following mathematical model for predicting the probability of hyperglycemia: 1/exp{-3.1437 + 0.5819(GA) + 0.9234(GIR) + 1.0978 (Clinical status)}The main predictive variables in our study, in increasing order of importance, were gestational age, glucose infusion rate and, the clinical status (stable or unstable) of the preterm newborn infant. The probability of hyperglycemia ranged from 4.1% to 36.9%.