Associations of maternal prenatal smoking with early childhood physical aggression, hyperactivity-impulsivity, and...

Area of Science:

• Developmental Psychology
• Child Psychiatry
• Behavioral Science

Background:

• Maternal smoking during pregnancy is a known risk factor for adverse child outcomes.
• Early childhood behavior regulation problems, including physical aggression and hyperactivity-impulsivity, can have long-term consequences.
• Understanding the specific impact of prenatal exposures on distinct behavioral trajectories is crucial for early intervention.

Purpose of the Study:

• To examine the association between maternal prenatal smoking and developmental trajectories of physical aggression (PA) and hyperactivity-impulsivity (HI) in early childhood.
• To investigate whether prenatal smoking predicts co-occurring PA and HI.
• To control for various perinatal, familial, and socio-economic factors.

Main Methods:

• Longitudinal population-based cohort study (N=1745) of children born in Québec (1997/1998).
• Trajectory model estimation to identify developmental patterns of PA and HI from 17 to 42 months.
• Multinomial regression analyses to assess the predictive role of maternal prenatal smoking.

Main Results:

• Prenatal smoking significantly predicted different PA trajectories, independent of other factors.
• Prenatal smoking did not predict HI trajectories when controlling for covariates.
• Maternal prenatal smoking independently predicted co-occurring high PA and high HI, alongside gender, siblings, and parenting style.

Conclusions:

• Maternal prenatal smoking is a significant predictor of early physical aggression development.
• Prenatal smoking contributes to the co-occurrence of physical aggression and hyperactivity-impulsivity in young children.
• These findings underscore the importance of addressing prenatal smoking to mitigate risks for multiple behavior regulation problems.