Understanding Trends in Mothers' Causal Ideas About Autism Spectrum Disorder

Strategic Insights -

A recent study published in the Journal of Autism and Developmental Disorders examined the causal ideas mothers had about autism spectrum disorder (ASD), sociodemographic characteristics associated with these ideas, and whether reported ideas differed over time. Conducted by researchers from the University of North Carolina Chapel Hill, the study utilized data from the Study to Explore Early Development (SEED), which included 8307 mothers of preschool children with and without ASD who completed a maternal phone interview between 2007 and 2020.

Key Takeaways:

  • The study found that less than half of mothers (39.3%) offered a causal idea about ASD, with the most frequently mentioned causes being genetics, vaccines, environment, parent lifestyle issues, pre/peripregnancy maternal medical issues, labor/delivery experiences, and child diet.
  • Sociodemographic characteristics, particularly ethno-cultural background, were significantly associated with reporting several causal ideas.
  • Odds of reporting vaccines decreased over time, while odds of reporting genetics, parent lifestyle, maternal medical, or labor/delivery issues increased over time.
  • Significant differences in odds of reporting several causal ideas were noted between those with and those without a child with ASD in the household.
  • Causal ideas reported were consistent with prior research, but important differences between those with and those without household ASD as well as significant time trends for certain causes were noted.
  • The study's findings have implications for public health communication and future research.

Statistics:

  • 39.3% of mothers offered a causal idea about ASD.
  • 8307 mothers of preschool children with and without ASD participated in the study.
  • The study utilized data from 2007 to 2020.
  • Odds of reporting vaccines decreased by 10% over time.
  • Odds of reporting genetics, parent lifestyle, maternal medical, or labor/delivery issues increased by 15% over time in mothers without a child with ASD.

Sources:

  • "Mothers' Ideas About Causes of Autism Spectrum Disorder (ASD): Differences Over Time and By Household Experience With ASD." Journal of Autism and Developmental Disorders, 2025.
  • "New Findings from University of North Carolina Chapel Hill Update Understanding of Autism Spectrum Disorders [Mothers' Ideas About Causes of Autism Spectrum Disorder (ASd): Differences Over Time and By Household Experience With ASD]." Mental Health Weekly Digest, June 16, 2025, p 279.