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author:("Das, abik")
1.  Infant Neurobehavioral Dysregulation Related to Behavior Problems in Children with Prenatal Substance Exposure 
Pediatrics  2009;124(5):1355-1362.
OBJECTIVE
To test a developmental model of neurobehavioral dysregulation relating prenatal substance exposure to behavior problems at age 7.
PATIENTS AND METHODS
The sample included 360 cocaine-exposed and 480 unexposed children from lower to lower middle class families of which 78% were African American. Structural equation modeling (SEM) was used to test models whereby prenatal exposure to cocaine and other substances would result in neurobehavioral dysregulation in infancy, which would predict externalizing and internalizing behavior problems in early childhood. SEM models were developed for individual and combined parent and teacher report for externalizing, internalizing, and total problem scores on the Child Behavior Checklist.
RESULTS
The Goodness of Fit Statistics indicated that all of the models met criteria for adequate fit with 7 of the 9 models explaining 18 to 60% of the variance in behavior problems at age 7. The paths in the models indicate that there are direct effects of prenatal substance exposure on 7-year behavior problems as well as indirect effects, including neurobehavioral dysregulation.
CONCLUSIONS
Prenatal substance exposure affects behavior problems at age 7 through two mechanisms. The direct pathway is consistent with a teratogenic effect. Indirect pathways suggest cascading effects where prenatal substance exposure results in neurobehavioral dysregulation manifesting as deviations in later behavioral expression. Developmental models provide an understanding of pathways that describe how prenatal substance exposure affects child outcome and have significant implications for early identification and prevention.
doi:10.1542/peds.2008-2898
PMCID: PMC2874881  PMID: 19822596
Prenatal substance exposure; cocaine; neurobehavioral dysregulation; behavior problems
2.  The Effect of Parenting Stress on Child Behavior Problems in High-Risk Children with Prenatal Drug Exposure 
Objective
To examine the relationship between early parenting stress and later child behavior in a high risk sample and measure the effect of drug exposure on the relationship between parenting stress and child behavior.
Methods
A subset of child-caregiver dyads (n = 607) were selected from the Maternal Lifestyle Study, which is a large sample of children (n = 1388) with prenatal cocaine exposure and a comparison sample unexposed to cocaine. Of the 607 dyads, 221 were prenatally exposed to cocaine and 386 were unexposed to cocaine. Selection was based on the presence of a stable caregiver at 4 and 36 months with no evidence of change in caregiver between those time points.
Results
Parenting stress at 4 months significantly predicted child externalizing behavior at 36 months. These relations were unaffected by cocaine exposure suggesting the relationship between parenting stress and behavioral outcome exists for high-risk children regardless of drug exposure history.
Conclusions
These results extend the findings of the relationship between parenting stress and child behavior to a sample of high-risk children with prenatal drug exposure. Implications for outcome and treatment are discussed.
doi:10.1007/s10578-008-0109-6
PMCID: PMC2861499  PMID: 18626768
disruptive behavior; parenting stress; high-risk children; prenatal drug exposure; cocaine

Results 1-2 (2)