Boys are diagnosed with ADHD far more often than girls in childhood. In adult clinics the gap narrows considerably, which tells its own story: a large number of women reach adulthood with ADHD that nobody named. NICE guideline NG87 explicitly warns that ADHD is under-recognised in girls and women, and that they are more likely to receive an incorrect diagnosis of another mental health condition. For clinicians assessing adults, women make up a growing share of referrals, and the assessment has to be built with that in mind.
Why ADHD in women is missed
Three things conspire. The first is presentation. Women are more likely to present with the predominantly inattentive form of ADHD — the daydreaming, the disorganisation, the chronic lateness, the unfinished tasks — rather than the disruptive hyperactivity that gets a boy referred at seven. Hyperactivity in women often turns inward, into restlessness, racing thoughts and constant talking, none of which a teacher writes home about.
The second is masking. Many girls learn early to compensate: to work twice as hard, to over-prepare, to rely on lists and on other people, to be the conscientious one. The strategies hold until the demands outgrow them — a degree, a first job, a baby, a promotion — and then collapse looks like anxiety or burnout rather than a lifelong condition.
The third is misdiagnosis. Anxiety, depression, emotionally unstable personality disorder and, increasingly, bipolar II are all diagnosed in women whose underlying difficulty is ADHD. The emotional dysregulation, the rejection sensitivity, the low self-esteem built on decades of underperformance relative to ability — these are real, and they are frequently treated for years while the ADHD driving them goes unrecognised. The tell is often a history of treatment that never quite worked.
Symptoms of ADHD in women that clinicians should ask about
Beyond the DSM-5 criteria, ask about the texture of daily life. Persistent difficulty starting tasks despite wanting to. A home or workspace that lurches between chaos and frantic tidying. Time blindness: consistently underestimating how long things take, and running late despite trying. Losing keys, phone, paperwork. A racing mind at night. Impulsive spending, eating or speaking. Intense emotional reactions to perceived criticism. Exhaustion from holding it all together in public. A sense of being 'behind' peers despite comparable or greater ability. None of these is diagnostic alone; together, with onset in childhood, they form a pattern.
Ask about school reports — 'could do better', 'bright but disorganised', 'chatty' — which are often the only childhood record available. Ask a parent or a sibling if the patient consents; collateral history is invaluable for establishing symptoms before age 12, and women frequently under-report their own childhood difficulties because they assumed everyone found it that hard.
The hormonal picture
Oestrogen modulates dopamine, and there is growing clinical and research interest in how ADHD symptoms in women fluctuate across the menstrual cycle, worsen in the premenstrual phase and postpartum, and can intensify markedly during perimenopause as oestrogen falls. Many women first seek assessment in their forties, when strategies that worked for decades stop working. Asking about the relationship between symptoms and cycle, pregnancy and menopause belongs in the assessment, and it informs treatment planning too: some women need medication adjusted across the cycle or alongside HRT, an area where the evidence is still developing and specialist input matters.
Structuring the assessment
A defensible adult ADHD assessment for a woman is the same as for anyone — a structured diagnostic interview such as DIVA-5 or ACE+, validated rating scales such as the ASRS, a developmental history, collateral information, screening for co-occurring conditions and a careful differential — with its emphasis shifted. Weight the inattentive criteria properly rather than looking for hyperactivity. Take the anxiety and depression history as potential consequences rather than only as alternatives. Explore masking directly: ask what it costs her to appear organised. Screen for autism, which co-occurs frequently and is also under-recognised in women, and for eating disorders and sleep disorders, both more common in women with ADHD.
Be alert, too, to the opposite error. Rising public awareness means some women arrive certain of the diagnosis, having recognised themselves in social media content. Their self-recognition is data, not a conclusion. A thorough assessment that reaches a different explanation serves them better than a diagnosis made to match expectations — and a thorough assessment that confirms ADHD gives them, often for the first time, an account of their life that makes sense.
What good assessment changes
For a woman diagnosed at 38 after two decades of antidepressants, an accurate diagnosis is not a label; it is a reinterpretation of her whole history. The treatment that follows — medication, psychoeducation, coaching, adjustments at work — tends to be far more effective than what came before, because it is aimed at the right thing. Clinicians who assess adults will see more of these women every year. Training that covers the female presentation, the hormonal dimension and the differential diagnosis in depth is no longer a specialist interest; it is core to competent adult ADHD assessment.