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Hyperglycemia in Extremely Preterm Infants-Insulin Treatment, Mortality and Nutrient Intakes
Itay Zamir1, Andreas Tornevi2, Thomas Abrahamsson3
1Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden.
Insights
Hyperglycemia is common in extremely preterm infants. Insulin treatment may reduce mortality in these infants, suggesting a need for reevaluation of current treatment practices in clinical trials.
Area of Science:
- Neonatalogy
- Endocrinology
- Pediatric Critical Care
Background:
- Extremely preterm infants often experience hyperglycemia.
- Understanding the factors influencing hyperglycemia and its impact on mortality is crucial.
Purpose of the Study:
- To determine the prevalence of hyperglycemia in extremely preterm infants.
- To investigate associations between nutrition, hyperglycemia, insulin treatment, and mortality.
Main Methods:
- Utilized data from the Extremely Preterm Infants in Sweden Study (EXPRESS).
- Included 580 infants born before 27 weeks of gestation.
- Analyzed glucose levels, nutritional intake, insulin treatment, and mortality up to 70 days.
Main Results:
- Daily hyperglycemia prevalence reached up to 30% in the first two postnatal weeks.
- Increased parenteral carbohydrate supply correlated with higher glucose concentrations.
- Hyperglycemia more than doubled the 28-day mortality risk.
- Insulin treatment in hyperglycemic infants was linked to lower mortality.
Conclusions:
- Hyperglycemia is a frequent issue in extremely preterm infants.
- Insulin treatment shows potential for reducing mortality in hyperglycemic infants.
- Further randomized controlled trials are needed to assess hyperglycemia treatment strategies.
Objective:
To explore the prevalence of hyperglycemia and the associations between nutritional intakes, hyperglycemia, insulin treatment, and mortality in extremely preterm infants.
Study Design:
Prospectively collected data from the Extremely Preterm Infants in Sweden Study (EXPRESS) was used in this study and included 580 infants born <27 gestational weeks during 2004-2007. Available glucose measurements (n = 9850) as well as insulin treatment and nutritional data were obtained retrospectively from hospital records for the first 28 postnatal days as well as 28- and 70-day mortality data.
Results:
Daily prevalence of hyperglycemia >180 mg/dL (10 mmol/L) of up to 30% was observed during the first 2 postnatal weeks, followed by a slow decrease in its occurrence thereafter. Generalized additive model analysis showed that increasing parenteral carbohydrate supply with 1 g/kg/day was associated with a 1.6% increase in glucose concentration (P < .001). Hyperglycemia was associated with more than double the 28-day mortality risk (P < .01). In a logistic regression model, insulin treatment was associated with lower 28- and 70-day mortality when given to infants with hyperglycemia irrespective of the duration of the hyperglycemic episode (P < .05).
Conclusions:
Hyperglycemia is common in extremely preterm infants throughout the first postnatal month. Glucose infusions seem to have only a minimal impact on glucose concentrations. In the EXPRESS cohort, insulin treatment was associated with lower mortality in infants with hyperglycemia. Current practices of hyperglycemia treatment in extremely preterm infants should be reevaluated and assessed in randomized controlled clinical trials.
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