Racial Differences in the Prevalence of Autism Spectrum Disorder: A Systematic Review.

Purpose: Racial differences in prevalence rates of autism spectrum disorder (ASD) have shifted in the United States (US) since the 1990s. This review addresses the nature and context of this shift and discusses potential contributing factors and areas for future research.

Methods: Seventeen population-based epidemiological birth cohort studies on ASD prevalence in the US that included race as a variable are included in the review.