The co‐occurrence of autism spectrum disorder and attention‐deficit/hyperactivity disorder symptoms in parents of children with ASD or ASD with ADHD

Abstract

Cross-assortative mating for ASD and ADHD does not form an explanation for the frequent co-occurrence of these disorders within families. Given that parental ADHD is predictive of offspring' ASD but not vice versa, risk factors underlying ASD may overlap to a larger degree with risk factors underlying ADHD than vice versa. However, future research is needed to clarify this issue.