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Birth defects in children with newborn encephalopathy
J F Felix1, N Badawi, J J Kurinczuk
1Medical student, University of Groningen, The Netherlands.
Insights
Birth defects are strongly associated with newborn encephalopathy, affecting over 27% of affected infants. Early diagnosis and inclusion in studies are crucial for understanding causes and improving outcomes for these infants.
Area of Science:
- Neonatal neurology
- Pediatric pathology
- Congenital anomalies
Background:
- Newborn encephalopathy is a serious condition affecting term infants.
- The role of co-occurring birth defects in newborn encephalopathy is not fully understood.
- Accurate ascertainment of birth defects can be challenging, with some diagnosed post-newborn period.
Purpose of the Study:
- To investigate the association between birth defects and newborn encephalopathy.
- To catalogue the spectrum of birth defects linked to newborn encephalopathy.
- To examine the impact of birth defects on the prognosis of newborn encephalopathy.
Main Methods:
- Population-based study comparing term infants with moderate/severe encephalopathy to controls.
- Ascertainment of all possible birth defects in affected infants and controls.
- Statistical analysis including odds ratios and confidence intervals to determine association strength.
Main Results:
- A significant association was found between birth defects and newborn encephalopathy (OR 8.55, p<0.001).
- Birth defects were present in 27.5% of encephalopathy cases versus 4.3% of controls.
- In 36.8% of cases with birth defects, the defect was deemed the probable cause of encephalopathy.
Conclusions:
- Birth defects are common in infants with newborn encephalopathy and significantly impact prognosis.
- Infants with both conditions have increased mortality and higher rates of cerebral palsy.
- Including birth defect assessment is vital for understanding the etiology and outcomes of newborn encephalopathy.
Abstract:
This study was designed to investigate birth defects found in association with newborn encephalopathy. All possible birth defects were ascertained in a population-based study of 276 term infants with moderate or severe encephalopathy and 564 unmatched term control infants. A strong association between birth defects and newborn encephalopathy was found with defects affecting 27.5% of children with encephalopathy and 4.3% of control children (odds ratio 8.55; 95% confidence interval 5.25 to 13.91;p<0.001). In 11.8% of infants with a birth defect the defect was not diagnosed until after the newborn period, illustrating one of the difficulties in attempting to exclude infants with birth defects from studies of newborn encephalopathy. The majority of defects (89%) were not specific anomalies of the CNS. In 36.8% of children with encephalopthy who had a birth defect, the defect was considered to be the probable cause of the encephalopathy. Infants with birth defects who had encephalopathy had a poorer prognosis than those without: they were twice as likely to die by the age of 2 years and three times more likely to have cerebral palsy. This study catalogues the spectrum of birth defects associated with newborn encephalopathy and illustrates the importance of their inclusion when investigating both the aetiology and outcome of this condition.