Psychopathology trajectories of children with autism spectrum disorder: the role of family poverty and parenting.

OBJECTIVE: Children with autism spectrum disorder (ASD) are reported to have high rates of co-occurring psychopathology. Little is known about risk factors that might contribute to this psychopathology. This study modeled the effect of family poverty on psychopathology trajectories in young children with ASD, and examined whether home organization and maternal warmth and involvement could buffer the effect of poverty on children's psychopathology.

METHOD: The sample comprised 209 children with ASD who participated in the UK's Millennium Cohort Study, a population birth cohort study. Individual trajectories of psychopathology at ages 3, 5, and 7 years were analyzed using growth curve models. Psychopathology was assessed with the Strengths and Difficulties Questionnaire.

RESULTS: Children with ASD exhibited increasingly high rates of psychopathology over time. Family poverty was associated with broad and specific (emotional and conduct problems) psychopathology, but not with changes in psychopathology over time. Warmth, involvement, and home organization did not buffer the association of family poverty with psychopathology. However, low warmth explained the relationship between poverty and broad psychopathology, and predicted annual changes in broad psychopathology. Warmth was associated with fewer conduct problems and less hyperactivity, and with an annual decrease in peer and conduct problems. Household chaos was a risk factor for conduct problems, as was maternal involvement for peer problems.

CONCLUSIONS: Family poverty, low maternal warmth, and household chaos are risk factors for externalizing problems in children with ASD. Maternal warmth may be a key target for intervention, particularly in poorer families of children with ASD.