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The vulnerable preschool child: the impact of biomedical and social risks on neurodevelopmental function
M E Msall1, J A Bier, L LaGasse
1Department of Pediatrics, Brown University School of Medicine, Providence, RI, USA.
Insights
Millions of newborns face biological risks and social disadvantages annually. Addressing these risks and enhancing early environments can optimize long-term outcomes for preschool children.
Area of Science:
- Neonatal health and developmental pediatrics
- Public health and epidemiology
- Neurodevelopmental disorders
Background:
- A significant proportion of newborns (28%) face biological risks and social disadvantages.
- Key risks include low birth weight (7%), very low birth weight (1%), alcohol exposure (20%), and other drug exposure (10%).
- Poverty affects 25% of children under 6, disproportionately impacting minority children and those with less educated or unmarried mothers.
Purpose of the Study:
- To analyze the long-term outcomes of preschool children with biological risks and social disadvantage.
- To evaluate the impact of factors like poverty, birth weight, and substance exposure on child development.
- To identify strategies for optimizing developmental trajectories in at-risk preschool populations.
Main Methods:
- Review of neonatal outcomes and long-term developmental trajectories.
- Analysis of predictors for cerebral palsy and low IQ in at-risk infants.
- Examination of the impact of fetal alcohol syndrome and hypoxic ischemic encephalopathy (HIE) on cognitive function.
Main Results:
- Parenchymal brain injury predicts cerebral palsy in very low birth weight survivors (7-10%).
- Poverty is a major predictor of low IQ.
- Fetal alcohol syndrome is linked to mild mental retardation and educational underachievement.
- While severe disabilities are not the norm, subtle long-term impacts like cognitive impairments and educational underachievement require further study.
- Outcomes for mild to moderate HIE are influenced by neurodevelopmental status and social disadvantage.
Conclusions:
- Combining strategies to mitigate biological risks and enhance early environments is crucial for optimizing preschool children's long-term outcomes.
- Early identification and intervention for biological and social risk factors can improve developmental trajectories.
- Further systematic analysis is needed to understand and address subtle cognitive impairments and educational underachievement in at-risk populations.
Abstract:
The scope of preschool children with biological risk and social disadvantage is large and includes over 1 million (28%) newborns per year. Currently in 1996, 7% of children are born with low birth weight, 1% are born with very low birth weight, 20% have alcohol exposure, and 10% have other drug exposure. Poverty is dynamic and impacts on 25% of children less than 6 years old with increased frequency in children who are minority, have mothers with less than a high school education, or are unmarried. There has been a markedly increased survival in very low birth weight and extremely low birth weight infants in the past 10 years. Outcomes of these neonatal populations reveals that parenchymal brain injury is the major predictor of cerebral palsy which occurs in 7% to 10% of very low birth weight survivors. However, poverty is the major predictor of low IQ. Fetal alcohol syndrome occurs in 1.9 per 1,000 births and is most often associated with mild mental retardation and educational underachievement. Studies investigating cocaine revealed that it is a multifactorial problem overlapping with polysubstance abuse and other risk factors for social disadvantage. The overwhelming number of children do not have cerebral palsy or severe mental retardation. The long-term impact is more subtle and needs more systematic analysis as well as critical evaluation of cognitive impairments and educational under-achievement. Hypoxic ischemic encephalopathy (HIE) cannot be determined by one biological measure. Though multiple disability occurs in 70% of children with Sarnat stage 3 HIE, 30% of survivors are not disabled. Children with mild to moderate HIE have long-term outcomes that are influenced by 9- to 12-month neurodevelopmental status and social disadvantage. By combining strategies to lessen biological risks and enhance developmentally appropriate environments, long-term outcomes of preschool children can be optimized.