Beyond Diagnosis: Evidence for Mental Health Inequality Among Neurodivergent Young People

Neurodivergent (ND) young people—including those with ADHD, autism, or dyslexia—experience disproportionately high levels of psychological distress. However, mental health research and services often overlook those without formal diagnoses, leaving a gap in understanding and support. This study used secondary data from the Youth Wellbeing Northern Ireland Survey to examine mental health outcomes among neurodivergent youth compared to their neurotypical (NT) peers, using an inclusive definition of ND that captured both diagnosed and probable cases.

One-third of the sample was classified as neurodivergent. Binary mental health indicators were derived from validated clinical screeners for anxiety, depression, suicidal ideation, and self-harm. Chi-square analyses revealed stark disparities: ND youth were almost four times more likely to screen positive for anxiety or depression than NT youth, three times more likely to report suicidal ideation, and twice as likely to engage in self-harm. These elevated risks were consistent across both diagnosed and undiagnosed neurodivergent subgroups.

Importantly, young people with probable neurodivergence—those who screened positive for ADHD or autism traits but lacked formal recognition—showed similar levels of psychological distress to their diagnosed peers. This suggests that diagnostic status does not meaningfully buffer mental health risk, and that current diagnostic gatekeeping may delay or deny access to crucial support.

These findings emphasise a critical need for mental health services and research to adopt more inclusive frameworks that recognise the full spectrum of neurodivergent experience. Identifying and supporting young people based on need rather than diagnosis is essential to addressing the burden of mental ill-health among this underserved population. Routine screening, earlier intervention, and neurodiversity-informed care models are urgently required to prevent worsening outcomes for neurodivergent adolescents.