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Updated: Jun 11, 2026

Biochemical Measurement of Neonatal Hypoxia
Published on: August 24, 2011
Hyperbilirubinemia in healthy neonates with glucose-6-phosphate dehydrogenase deficiency
Yi-Hao Weng1, Yi-Hung Chou, Rey-In Lien
1Department of Pediatrics, Division of Neonatology, Chang Gung Children's Hospital, 5 Fu-Shin Street, Kueishan, Taoyuan, Taiwan.
Insights
Glucose-6-phosphate dehydrogenase (G6PD) deficiency increases the risk of neonatal hyperbilirubinemia in newborns. Lower G6PD enzyme activity in males with hyperbilirubinemia suggests a significant association.
Area of Science:
- Neonatology
- Medical Genetics
- Biochemistry
Background:
- Neonatal hyperbilirubinemia is a common condition.
- Glucose-6-phosphate dehydrogenase (G6PD) deficiency is an inherited enzyme disorder.
- The association between G6PD deficiency and neonatal hyperbilirubinemia requires further investigation.
Purpose of the Study:
- To assess the association between G6PD deficiency and neonatal hyperbilirubinemia.
- To compare the incidence of hyperbilirubinemia in G6PD-deficient versus G6PD-normal newborns.
- To investigate the relationship between G6PD enzyme activity and hyperbilirubinemia in G6PD-deficient neonates.
Main Methods:
- A cohort study was conducted involving 42,110 inborn infants.
- G6PD deficiency was diagnosed using a quantitative enzyme assay.
- Neonatal hyperbilirubinemia was defined as serum total bilirubin >/= 15 mg/dl.
Main Results:
- G6PD deficiency was identified in 3.54% of males and 1.57% of females.
- Hyperbilirubinemia incidence was significantly higher in G6PD-deficient males (11.36%) and females (7.06%) compared to G6PD-normal infants.
- Lower G6PD enzyme activity was significantly associated with hyperbilirubinemia in G6PD-deficient males, but not females.
Conclusions:
- G6PD-deficient neonates face an elevated risk of hyperbilirubinemia, even without hemolytic agents.
- Lower G6PD enzyme activity is linked to neonatal hyperbilirubinemia in G6PD-deficient males.
- G6PD deficiency is a significant risk factor for neonatal hyperbilirubinemia.
Abstract:
A cohort study was carried out to assess the association between glucose-6-phosphate dehydrogenase (G6PD) deficiency, diagnosed by quantitative enzyme assay, and neonatal hyperbilirubinemia, defined as serum total bilirubin >/=15 mg/dl, in the well-baby nursery of Chang Gung Children's Hospital. Among 42,110 inborn infants, 757 male (3.54%) and 326 female (1.57%) newborns were G6PD-deficient. Compared to the occurrence of hyperbilirubinemia in G6PD-normal newborns (1.41% in male, 1.44% in female) in the well-baby nursery, a significantly higher incidence was observed in both G6PD-deficient male (11.36%) and female (7.06%) newborns. Further analyses demonstrated that the enzyme activity of G6PD in G6PD-deficient male newborns with hyperbilirubinemia (1.56+/-1.37 U/g Hb) were significantly lower than the subjects without hyperbilirubinemia (2.01+/-1.7 U/g Hb). No significant difference was observed in G6PD-deficient female newborns with hyperbilirubinemia (6.91+/-2.76 U/g Hb) compared to those without hyperbilirubinemia (7.81+/-2.84 U/g Hb). These data suggest that the G6PD-deficient neonates are at increased risk for hyperbilirubinemia even in the nursery free from agents that can potentially cause hemolysis to G6PD-deficient red cells. The lower G6PD enzyme activity was associated with the neonatal hyperbilirubinemia in G6PD-deficient male neonates.
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