Mild autism spectrum disorders in preschool children: Prevalence, co-occurrent symptoms and psychosocial development

Study about the prevalence of autism spectrum disorder (ASD) symptoms in 1,104 preschool-aged children attending urban/rural schools. We describe co-occurrent symptoms and compare psychosocial development and parents' mental health between children with ASD-symptoms, children with attention deficit hyperactivity disorder (ADHD) symptoms, and controls. The prevalence of ASD symptoms ranged between 1.18-2.17% depending on the informants (parents, teachers or both). In ASD children, ADHD symptoms (58%) and tics (50%) were most co-occurrent. There was no difference between ASD and ADHD groups in psychosocial development. The ASD group was perceived less competent than controls in fine coordination, self-help skills, play-withpeers (family) and also less proficient in language comprehension/production skills and pretend-play (school). More than one-third of mothers in the ASD and ADHD groups reported psychological symptoms, significantly differing from control fathers and mothers. For early detection of ASD, family and school information needs to be studied, considering ADHD symptoms as valid early predictors. © 2014 Asociación Española de Psicología Clínica y Psicopatología.