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School-Aged Outcomes following Prenatal Methamphetamine Exposure: 7.5-Year Follow-Up from the Infant Development,
Nwando Eze1, Lynne M Smith1, Linda L LaGasse2
1Department of Pediatrics, David Geffen School of Medicine at University of California, Los Angeles (UCLA) and Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA.
Insights
Prenatal methamphetamine exposure (PME) is linked to behavioral issues in children. Early adversity significantly mediates this relationship, suggesting it is a key factor in developmental outcomes for exposed infants.
Area of Science:
- Child Psychology
- Developmental Neuroscience
- Substance Abuse Research
Background:
- Prenatal methamphetamine exposure (PME) is a growing concern with potential long-term effects on child development.
- Understanding the pathways through which PME influences behavior is crucial for intervention.
Purpose of the Study:
- To investigate the association between PME and behavior problems at 7.5 years of age.
- To determine if early adversity mediates the relationship between PME and later behavioral outcomes.
Main Methods:
- Longitudinal study of 412 mother-infant pairs across 4 sites.
- Identified PME through self-report and meconium analysis.
- Assessed behavior problems using the Child Behavior Checklist and an early adversity index at 7.5 years.
Main Results:
- PME was significantly associated with higher early adversity scores (P < .001).
- PME correlated with increased externalizing, rule-breaking, and aggressive behaviors (P < .05).
- Early adversity significantly mediated the link between PME and behavioral problems, even after controlling for other prenatal exposures.
Conclusions:
- Early adversity plays a significant role in the behavioral outcomes of children with prenatal methamphetamine exposure.
- Interventions targeting early adversity may mitigate behavioral problems in children exposed to methamphetamine in utero.
Objective:
To assess the relationship between prenatal methamphetamine exposure (PME) and behavior problems at age 7.5 years and the extent to which early adversity mediated this relationship.
Study Design:
The multicenter, longitudinal Infant Development, Environment, and Lifestyle study enrolled 412 mother-infant pairs at 4 sites. Methamphetamine-exposed participants (n = 204) were identified by self-report and/or gas chromatography/mass spectrometry confirmation of amphetamine and metabolites in infant meconium. Matched participants (n = 208) denied methamphetamine use and had a negative meconium screen. At the 7.5-year follow-up, 290 children with complete Child Behavior Checklist data and an early adversity index score were available for analysis (n = 146 exposed).
Results:
PME was significantly associated with an increased early adversity index score (P < .001) and with increased externalizing, rule-breaking behavior, and aggressive behavior (P < .05). Early adversity was also associated with higher externalizing behavior scores. Early adversity significantly mediated the relationship between PME and behavioral problems. After adjusting the mediation model for sex, prenatal tobacco, alcohol, and marijuana exposures, and study site, the association of PME with early adversity remained significant.
Conclusions:
Though PME is associated with behavioral problems, early adversity may be a strong determinant of behavioral outcome for children exposed to methamphetamine in utero. Early adversity significantly mediated the relationship between PME and behavioral problems.
