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Prenatal cocaine exposure and child outcomes: a conference report based on a prospective study from Cleveland
Lynn T Singer1, Sonia Minnes1, Meeyoung O Min1
1Case Western Reserve University, Cleveland, Ohio, USA.
Insights
Prenatal cocaine exposure (CE) negatively impacts fetal growth, attention, executive function, and behavior through adolescence. While overall IQ was unaffected, specific cognitive and behavioral deficits were observed in CE children.
Area of Science:
- Neuroscience
- Developmental Psychology
- Public Health
Background:
- Prenatal exposure to substances, including cocaine, can have lasting effects on child development.
- Longitudinal studies are crucial for understanding the long-term consequences of prenatal exposures.
Purpose of the Study:
- To describe developmental outcomes in a cohort of infants exposed to cocaine prenatally.
- To assess the impact of prenatal cocaine exposure (CE) on cognitive, behavioral, and neurological development through mid-adolescence.
Main Methods:
- A longitudinal prospective cohort study followed 218 cocaine-exposed (CE) and 197 nonexposed infants from birth to mid-adolescence.
- Developmental outcomes including fetal growth, IQ, behavior, executive function, and language were assessed using standardized measures.
- Neuroimaging (MRI) was performed on a subset of children at ages 7 and 14 years.
- Multiple regression analyses controlled for demographic, drug, and environmental confounders.
Main Results:
- CE was associated with significant negative effects on fetal growth, attention, executive function, language, and behavior.
- Overall IQ was not affected, but perceptual reasoning IQ and visual-motor skills were lower in CE children.
- CE predicted reduced corpus callosum volume and decreased gray matter in occipital and parietal lobes.
- Children with CE had a higher risk for substance misuse in adolescence.
Conclusions:
- Prenatal cocaine exposure is linked to poorer perceptual organization IQ, visual-spatial processing, attention, language, executive function, and behavior regulation.
- Confounding risk factors can have additive effects on developmental outcomes.
- These deficits persist through early adolescence, highlighting the long-term impact of prenatal CE.
Objective:
The study aims to describe developmental outcomes from a longitudinal prospective cohort (Cleveland study) of prenatally cocaine-exposed (CE) infants.
Methods:
Two hundred eighteen CE and 197 nonexposed infants were enrolled at birth and followed through mid-adolescence. Birth CE status was determined by interview and biologic measures. Multiple demographic, drug, and environmental correlates were controlled. Standardized, normative, reliable measures of fetal growth, intelligence quotient (IQ), behavior, executive function, and language were given at each age and risk for substance misuse assessed in adolescence. A subset of children received volumetric magnetic resonance imaging (MRI) at 7 years and functional MRI at 14 years. The effect of CE was determined through multiple regression analyses controlling for confounders.
Results:
Cocaine exposed had significant negative effects on fetal growth, attention, executive function, language, and behavior, while overall IQ was not affected. CE had significant negative effects on perceptual reasoning IQ and visual-motor skills and predicted lower volume of corpus callosum and decreased gray matter in the occipital and parietal lobes. CE children had higher risk for substance misuse. Confounding risk factors had additive effects on developmental outcomes.
Conclusions:
Prenatal exposure to cocaine was related to poorer perceptual organization IQ, visual-spatial information processing, attention, language, executive function, and behavior regulation through early adolescence.
