What Percentage of ADHD Cases Also Involve ODD? 

ADHD and ODD comorbidity is more common than many may realise. Studies suggest that around 30-50% of children with ADHD also experience ODD, highlighting the significant overlap between these two conditions. This ADHD ODD comorbidity can make diagnosis and treatment more complex, as both conditions share similar symptoms like irritability and impulsivity but require distinct management approaches. 

Percentage of ADHD Cases Involving ODD 

The ADHD statistics show that ADHD is a prevalent condition, affecting approximately 5-7% of children worldwide. Among these children, ODD rates are notably higher compared to the general population. When ADHD and ODD occur together, it often leads to more severe behavioural problems, such as frequent temper tantrums, defiance toward authority figures, and trouble following rules. These behaviours can impact a child’s social, academic, and family life, often creating additional challenges for both children and parents. 

Understanding the relationship between ADHD and Oppositional Defiant Disorder is essential for effective treatment. Early intervention, which may include behavioural therapy, family support, and sometimes medication, can greatly improve outcomes for children with co-occurring disorders like ADHD and Oppositional Defiant Disorder. A personalised approach is key to managing both conditions successfully. 

Visit providers like ADHD Certify for personal consultations and expert guidance tailored to your unique situation. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Oppositional Defiant Disorder. 

Avery Lombardi, MSc

Author

Avery Lombardi is a clinical psychologist with a Master’s in Clinical Psychology and a Bachelor’s in Psychology. She has professional experience in psychological assessment, evidence-based therapy, and research, working with both child and adult populations. Avery has provided clinical services in hospital, educational, and community settings, delivering interventions such as CBT, DBT, and tailored treatment plans for conditions including anxiety, depression, and developmental disorders. She has also contributed to research on self-stigma, self-esteem, and medication adherence in psychotic patients, and has created educational content on ADHD, treatment options, and daily coping strategies.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS

Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy.