Autistic spectrum disorder traits in children with attention deficit hyperactivity disorder

Area of Science:

• Child and Adolescent Psychiatry
• Neurodevelopmental Disorders
• Clinical Psychology

Background:

• Current diagnostic systems lack criteria for co-occurring attention deficit hyperactivity disorder (ADHD) and autistic spectrum disorder (ASD).
• Screening for ASD is common in children with ADHD during clinical assessments and research.
• Existing research suggests a potential overlap in traits between ADHD and ASD.

Purpose of the Study:

• To investigate the prevalence of autistic traits in children diagnosed with ADHD compared to neurotypical controls.
• To identify specific autistic traits that are more common in children with ADHD.
• To explore the diagnostic implications of these overlapping traits.

Main Methods:

• A sample of 30 children with ADHD and 30 matched controls (aged 9-15 years) was recruited.
• Autistic spectrum disorder (ASD) traits were assessed using the Social Aptitudes Scale (SAS) and the Social Communication Questionnaire (SCQ).
• Statistical analyses compared trait levels between the ADHD and control groups.

Main Results:

• Children with ADHD exhibited significantly higher levels of autistic traits compared to controls.
• A substantial percentage of children with ADHD met screening thresholds for ASD (28% on SCQ, 62% on SAS).
• ADHD group showed elevated communication and social deficits, but not repetitive behaviors, relative to controls.

Conclusions:

• The findings indicate a significant overlap in autistic traits between ADHD and ASD.
• Further research is required to determine if these communication and social difficulties are part of the broader ASD phenotype or specific to ADHD.
• This highlights the need for refined diagnostic approaches for comorbid ADHD and ASD.