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Congenital defects and the care of low birthweight infants
T G Powell1, P O Pharoah, R W Cooke
1Department of Community Health, University of Liverpool, U.K.
Insights
Congenital defects were present in 27% of stillbirths and 8.4% of livebirths among infants weighing 501-2000g. Prenatal prevention of disease is crucial for improving outcomes in low birthweight infants.
Area of Science:
- Neonatalogy
- Pediatric Epidemiology
- Medical Genetics
Background:
- Congenital defects significantly impact infant mortality and morbidity.
- Low birthweight infants (501-2000g) represent a vulnerable population with increased risk.
- Understanding the prevalence and associations of congenital defects is vital for improving infant care.
Purpose of the Study:
- To determine the prevalence of congenital defects in infants born between 501-2000g.
- To identify factors associated with congenital defects in this birthweight group.
- To assess the impact of congenital defects on infant survival, mortality, and healthcare utilization.
Main Methods:
- Retrospective analysis of hospital records for infants born 1979-1981 with birthweights 501-2000g.
- Ascertainment of congenital defects through record examination and survivor tracing.
- Comparison of defect prevalence across different outcomes (stillbirth, livebirth, neonatal survival, 2-year survival).
Main Results:
- Congenital defects were identified in 27% of stillbirths, 8.4% of livebirths, 4.5% of neonatal survivors, and 3.6% of 2-year survivors.
- Prevalence increased with lower birthweight in stillbirths but not survivors.
- Risk factors for livebirths included growth retardation, singleton status, and absence of prior reproductive loss.
- Congenital defects were associated with 24-57% of neonatal deaths in higher birthweight categories (1001-2000g).
- Major neurological impairments were linked to defects in 10% of survivors; surgery and hospital admissions were higher in affected infants.
- Infants weighing 1501-2000g accounted for 77% of all survivors with congenital defects.
Conclusions:
- Congenital defects are a significant contributor to adverse outcomes in low birthweight infants.
- Prenatal prevention strategies are essential for improving the prognosis of this population.
- Targeted interventions and improved prenatal care can reduce the burden of congenital defects in infants.
Abstract:
Proportions of infants of birthweight 501-2000 g born in 1979-1981 who had defects recognisable at birth were ascertained by examining hospital records and tracing survivors. Twenty-seven per cent of 230 stillbirths, 8.4% of 1411 livebirths, 4.5% of 1117 neonatal survivors and 3.6% of 1074 two-year survivors had a congenital defect, birth prevalence rising with lower birthweight only in stillbirths. Among livebirths, birth prevalence was increased in growth retarded infants, in singletons and in infants of mothers who had not had a previous reproductive loss. Twenty-four per cent and 57% of neonatal deaths in the 1001-1500 g and 1501-2000 g birthweight groups respectively were associated with a congenital defect. Major neurological impairments were directly attributable to congenital defects in 10% of 71 survivors; surgery and hospital admissions were far more frequent in infants with congenital defects than others. The 1501-2000 g group accounted for 77% of all survivors with a congenital defect. Further improvements in the prognosis of low birthweight infants will depend to a large extent on prenatal prevention of disease.