What Factors Influence the Classification of ADHD Presentations Under DSM-5? 

The ADHD classification factors under the DSM-5 are influenced by a variety of elements, including the individual’s age, symptom presentation, and the severity of the symptoms. These factors help determine whether a person is diagnosed with the Inattentive Presentation, Hyperactive-Impulsive Presentation, or Combined Presentation of ADHD. 

Age plays a significant role in the classification process, as symptoms may manifest differently depending on the individual’s developmental stage. For example, younger children may display more obvious hyperactive symptoms, while adults might experience more subtle symptoms, such as inattention or organisational difficulties. As a result, the age of the individual can influence the diagnosis. 

Another critical factor is the symptoms themselves. According to the DSM-5 criteria, an individual must demonstrate a certain number of symptoms from either the inattention or hyperactivity-impulsivity categories. These symptoms must cause significant impairment in at least two settings, such as at home and in school or work. The severity of these symptoms also plays a role in classification, as more severe or disruptive behaviours often result in a more specific ADHD presentation. 

How It Helps 

Understanding the ADHD classification factors helps clinicians accurately assess and diagnose ADHD. By considering age, symptoms, and the impact of these symptoms, healthcare providers can create more tailored treatment plans that address the unique needs of everyone. This approach ensures that each person with ADHD receives the most appropriate care. 

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.   

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to DSM-5 Diagnostic Guidelines.  

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

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.