Clinical characteristics of children with ASD and comorbid ADHD: Association with social impairment and externalizing and internalizing behaviours

Autism spectrum disorder (ASD) and attention-deficit hyperactivity (ADHD) are frequently occurring conditions that often associated (ASD + ADHD). However, there few comparative studies concerning the clinical presentation in patients formally diagnosed with both ASD ADHD. Here, we aimed to 1) compare social impairment externalizing/internalizing behavioural problems across four groups of children: ADHD, alone, ADHD typical development 2) examine their bidirectional relationship and/or symptoms. This study included 186 participants from 6 12 years age: single (n = 98), 29), 28), TD 31). The results showed children had a higher level than those group. In addition, group presented greater attention deficit Externalizing /internalizing behaviours were more frequent all neuro-developmental disorders development. externalizing related severity groups, whereas internalizing severity. These findings highlight specific needs who have underscore necessity individualizing interventions.