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Global ADHD diagnoses surge; women's late-life cases reveal decades of masking

International review confirms rising ADHD diagnoses worldwide across all ages, while research highlights how hormonal changes unmask the condition in midlife women.

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Aug 9yesterdaytodaynow · 9:06 PM

Summary, timeline and people extracted by Claude from 5 items across 1 source · 14h ago. Quotes are verbatim.

A global review published in early August 2026 documents rising ADHD diagnoses and prescriptions across all age groups worldwide. Concurrent reporting reveals that women are increasingly diagnosed in midlife, often in their 40s, when perimenopause reduces estrogen levels that had masked ADHD symptoms for decades. Researchers and clinicians frame this not as an epidemic but as identification of a longstanding backlog driven by diagnostic criteria historically built around how ADHD presents in boys.

  • A global review confirms ADHD diagnoses and prescriptions are rising across all age groups worldwide, framed by experts as identification of undiagnosed cases rather than a new epidemic.
  • Women are the fastest-growing group receiving ADHD diagnoses in midlife (often 40s–50s), revealing decades of unrecognized symptoms masked by compensatory strategies and gender bias in diagnostic criteria.
  • Research shows perimenopause-related estrogen decline unmasks previously compensated ADHD in women, with 2025 studies documenting significantly worse perimenopausal symptoms in women with ADHD compared to those without.
  • Diagnostic criteria historically centered on how ADHD manifests in boys, leading to systematic under-recognition in girls and women, who are often misdiagnosed with anxiety or depression instead.

How it unfolded

  1. Reaction Researchers flag under-researched issue

    Yahoo News Canada reports that researchers believe an ADHD issue in women has been overlooked, reflecting broader coverage of the gender diagnostic gap.

  2. Analysis Expert analysis on women's unmasking

    Hannah Ferguson's Substack piece argues that women diagnosed with ADHD in midlife have had the condition for decades, and perimenopause removes estrogen that was masking symptoms. Cites 2025 research showing women with ADHD report significantly worse perimenopausal symptoms.

    “Perimenopause doesn't cause ADHD, it takes away the hormones that were masking it.”

    Hannah Ferguson
  3. Report Hormone-ADHD connection reported

    The Independent publishes an article exploring how hormonal changes, particularly in women, may be exacerbating ADHD symptoms.

  4. Report Study coverage spreads across outlets

    Multiple news sources including The Shillong Times, The Conversation, KevinMD, and Columbia Basin Herald publish stories on the rising diagnoses, with KevinMD framing it as a naming issue rather than a new disorder.

  5. Report Global ADHD review published

    Medical Xpress and other outlets report on an international review finding that ADHD diagnoses and prescriptions have increased globally across all age groups.

What people are saying verbatim

“Perimenopause doesn't cause ADHD, it takes away the hormones that were masking it.”

Hannah Ferguson, Writer and analyst · Hannah Ferguson | Substack · Aug 9

“The diagnostic criteria were built around how ADHD presents in young boys, and girls have been paying for it ever since.”

Hannah Ferguson, Writer and analyst · Hannah Ferguson | Substack · Aug 9

“This gets reported as an 'ADHD epidemic.' It is not an epidemic. It is a backlog.”

Hannah Ferguson, Writer and analyst · Hannah Ferguson | Substack · Aug 9

“Adult-onset ADHD is a naming problem, not a new disorder”

KevinMD.com, Medical publication · KevinMD.com ↗ · Aug 8

“A woman with ADHD who has spent decades compensating has essentially been running demanding software on limited RAM, with oestrogen quietly boosting the system.”

Hannah Ferguson, Writer and analyst · Hannah Ferguson | Substack · Aug 9

“a woman in her mid-forties, highly capable, holding down a career and a household and everybody else's calendar, sits down and says, 'I can't think anymore.'”

Hannah Ferguson, Writer and analyst · Hannah Ferguson | Substack · Aug 9