Are Prevalence Studies Hiding Underdiagnosis?

PostedOctober 9, 2025

UpdatedOctober 9, 2025

ByMy Patient Advice

Author: Avery Lombardi, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Yes, prevalence of ADHD underdiagnosis is a concern, and it may be hidden in many prevalence studies. While these studies can help us understand how widespread ADHD is, they often rely on specific criteria and survey methods that may overlook hidden cases. As a result, the true number of people with ADHD may be underestimated, particularly in populations that are less likely to seek a diagnosis or receive adequate evaluation.

For example, adults with ADHD are often underdiagnosed because their symptoms can look different from those in children. In addition, epidemiological bias in prevalence studies often fails to account for factors such as age, gender, and cultural differences, leading to significant portions of the population being missed. Women and minorities, in particular, tend to present with less obvious ADHD symptoms, making it harder for clinicians to identify the condition.

Why Prevalence Studies May Hide Underdiagnosis

Here’s why prevalence of ADHD underdiagnosis remains hidden:

Survey methods

Many studies use self-reported data or rely on school-based screenings, which may not capture adults or those in less traditional educational settings.

Cultural and gender bias

ADHD is more commonly diagnosed in boys, and women or those from different cultural backgrounds may have their symptoms overlooked or misinterpreted.

Hidden cases

People with mild symptoms or those who have learned to cope may not be included in studies, further skewing the data.

In conclusion, to get a true sense of ADHD prevalence, more comprehensive, diverse studies are needed, alongside efforts to improve diagnosis in overlooked groups. Accurate data and inclusive diagnostic practices are crucial for understanding the full extent of ADHD.

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 Overdiagnosis vs. Underdiagnosis in ADHD.

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.