AuDHD in adult women: why assessment models struggle with this intersection
Understand the challenges of assessing co-occurring ADHD and autism (AuDHD) in adult women, and why integrated approaches are needed in clinical practice.
Co-occurring autism and ADHD (sometimes referred to as AuDHD or autism-ADHD comorbidity) is increasingly recognised in adult clinical practice.
In the UK, women aged 23-49 are now the largest group receiving new ADHD diagnoses. At the same time, research suggests that a significant proportion of autistic adults also meet criteria for ADHD.
In practice, this overlap is becoming more common, particularly in adult women presenting for assessment.
What is AuDHD?
AuDHD refers to the co-occurrence of autism and ADHD within the same individual.
Rather than presenting as two completely separate conditions, emerging evidence suggests that traits interact in ways that shape attention, behaviour, and social experience differently from either condition alone.
This has important implications for how assessment is approached in adults, particularly in women, where presentations are often less aligned with traditional diagnostic models.
More than two conditions side by side
AuDHD is not simply autism and ADHD presenting independently.
When both are present, they interact, influencing how traits appear, how individuals cope, and how difficulties are experienced.
Some studies suggest distinct cognitive and neurological patterns in individuals with both diagnoses, pointing towards a more integrated neurodevelopmental profile rather than a purely additive one.
Why current assessment pathways struggle
When autism and ADHD co-occur, traits can mask or reshape each other.
For example:
- ADHD-related impulsivity may obscure autistic routines
- Rigid structures may be used to compensate for attentional dysregulation
- Hyperfocus may act as a form of self-regulation
- Social masking may reduce the visibility of both
This can result in presentations that appear inconsistent or subthreshold across both frameworks.
When traits interact, visibility decreases
When both conditions are considered in isolation, this interaction can reduce trait visibility across each diagnostic pathway.
Patterns may appear partial in each framework, even when the overall neurodevelopmental profile is clear in longitudinal and cross-domain clinical data.
The added complexity in adult women
For women, this becomes even more complex.
Social expectations, masking, and long-term adaptation can produce presentations that do not align clearly with traditional diagnostic models.
Some women report receiving multiple diagnoses over time, without feeling that any single framework fully captures their experience.
This reflects a limitation in how current systems categorise neurodevelopmental profiles, rather than a lack of clarity on the individual's part.
A structural gap in assessment
When ADHD and autism are treated as separate questions, the integration work often falls on the individual.
They are left to:
- Connect patterns across time
- Reconcile different diagnostic outcomes
- Make sense of overlapping traits
This contributes to long diagnostic journeys and delayed clarity.
Towards more integrated approaches
Improving assessment for AuDHD does not necessarily require entirely new tools.
But it does require:
- Holding both conditions in mind simultaneously
- Integrating information across domains
- Recognising how traits interact, not just how they present in isolation
A more integrated approach may reduce the multi-year diagnostic cycles often seen in adult women.
Supporting clinicians in this complexity
At Lira, we are exploring how to support clinicians working in this space.
Lira for Professionals provides a structured approach to ADHD and autism assessment in adult women, helping to:
- Integrate information across domains
- Map traits consistently to DSM-5 criteria
- Capture patterns that may not fit neatly into a single framework
The aim is not to replace clinical judgement, but to support clearer, more structured, and more consistent assessments.
Explore the demo
If you are working with adult women and navigating this overlap in practice:
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