Findings fuel further exploration
Although hypoglycemia is common in newborns, its management and potential outcomes remain subjects for debate, Paul J. Rozance, MD, of the University of Colorado, Aurora, wrote in an editorial accompanying both studies.
“Often, the same features that increase the risk of hypoglycemia in newborns also increase the risk for poor outcomes independent of hypoglycemia,” he said.
The study by Shah and colleagues was not a randomized trial of a specific management strategy, Dr. Rozance noted. However, the high rate of low educational attainment in children not exposed to dextrose gel emphasizes the need for more effective management of infant hypoglycemia, he said. “The findings also suggest that antenatal conditions that are associated with increased risk of hypoglycemia among newborns are associated with increased risk for impaired neurodevelopment and educational achievement, independent of neonatal hypoglycemia,” he said. The study findings contrast with those of an earlier study showing low academic achievement association with early transient hypoglycemia, which could argue for earlier intervention, he noted.
The study by Edwards and colleagues addressed the potential value of dextrose gel as an early intervention to prevent neonatal hypoglycemia, said Dr. Rozance.
“The 95% CI for the primary outcome of neurosensory impairment included up to a 7% increased risk for neurosensory impairment in the prophylactic dextrose gel group. The 7% increased risk was defined by the investigators as potentially clinically important, and the study may have been underpowered to detect small differences in the primary outcome,” he wrote.
Although the reasons for adverse outcomes in children given prophylactic dextrose gel remain unclear, “incorporation of prophylactic dextrose gel into clinical practice should await further research,” he said.
Regarding such research, Dr. Rozance proposed an “ideal study,” that would “randomize newborns with hypoglycemia to treatment or no treatment, although equipoise and ethical support for such a study are lacking. Another strategy would be to randomize newborns with hypoglycemia to receive low- or high-treatment glucose concentration goals,” he noted.
The relationship between hypoglycemia and impaired neurodevelopment is yet to be determined, but the two studies provide new evidence for the clinical importance and need for management of neonatal hypoglycemia and subsequent neurodevelopmental outcomes, he concluded.
The study by Shah and colleagues was supported by the Health Research Council of New Zealand and the Maurice and Phyllis Paykel Trust. Dr. Shah disclosed a doctoral fellowship from the University of Auckland. The study by Edwards and colleagues was supported by the Health Research Council of New Zealand and the Eunice Kennedy Shriver National Institute of Child Health and Human Development of the National Institutes of Health. Ms. Edwards had no financial conflicts to disclose. Dr. Rozance disclosed receiving a StatStrip from Nova Biomedical for use in his laboratory.