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Executive functioning at ages 5 and 7 years in children with prenatal cocaine exposure

Fonda Davis Eyler1, Tamara Duckworth Warner, Marylou Behnke

  • 1Department of Pediatrics, University of Florida, PO Box 100296, Gainesville, FL 32610-0296, USA. eylerfd@peds.ufl.edu

Developmental Neuroscience
|April 18, 2009
PubMed

Insights

Prenatal cocaine exposure (PCE) negatively impacts children's head circumference, indirectly affecting executive functioning. Environmental quality and caregiver functioning also play crucial roles in development.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Pediatrics

Background:

  • Prenatal substance exposure, particularly cocaine, poses risks to child development.
  • Executive functioning is critical for cognitive and behavioral regulation in children.
  • Longitudinal studies are needed to understand the long-term effects of prenatal cocaine exposure.

Purpose of the Study:

  • To evaluate the impact of prenatal cocaine exposure (PCE) on executive functioning in children at ages 5 and 7.
  • To investigate the mediating role of head circumference and environmental factors in the relationship between PCE and executive functioning.

Main Methods:

  • Prospective longitudinal study design.
  • Inclusion of 154 pregnant cocaine users and 154 matched nonusers.
  • Assessment of children's executive functioning by masked evaluators and caregiver interviews.

Main Results:

  • Increased head circumference at birth positively predicted executive functioning.
  • PCE negatively affected head circumference, which in turn negatively impacted executive functioning.
  • At age 5, environmental quality predicted executive functioning (R²=0.24).
  • At age 7, caregiver functioning predicted environmental quality, which predicted executive functioning; girls showed better executive functioning (R²=0.30).

Conclusions:

  • Prenatal cocaine exposure has an indirect negative effect on executive functioning, mediated by reduced head circumference at birth.
  • Environmental factors and caregiver functioning are significant predictors of executive functioning in childhood.
  • Findings highlight the complex interplay of biological and environmental factors in child development following prenatal substance exposure.

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