You’ve heard it. I’ve heard it. “Everyone has ADHD now.” Your uncle said it at Thanksgiving. Your coworker said it when you mentioned your diagnosis. A think-piece writer said it to get clicks.

A major study published today says they’re all wrong.

TL;DR

What You Need to Know	The Facts
The claim	ADHD is overdiagnosed
What the study found	No credible evidence of overdiagnosis
Real problem	ADHD is underdiagnosed and undertreated
Child prevalence	~5.4% have ADHD, fewer are diagnosed
Adult prevalence	~3.3% (some estimates higher), less than 20% treated
What this means for you	Your diagnosis is valid. Seeking help is rational.

One-sentence verdict: The science confirms what we already knew: too many people with ADHD aren’t getting help, not the other way around.

What Did the Study Actually Find?

A paper titled “ADHD (over) diagnosis: fiction, fashion and failure” was published today in the British Journal of Psychiatry. Led by Prof Samuele Cortese at the University of Southampton with Prof Tamsin Ford at the University of Cambridge as senior co-author, it reviewed existing evidence on ADHD diagnostic rates.

Their conclusion: diagnostic rates are still substantially below the actual population prevalence. About 5.4% of children and 3.3% of adults meet criteria for ADHD. Far fewer have been identified or treated.

The paper doesn’t deny that some misdiagnosis happens. Low-quality assessments and poor adherence to clinical guidelines mean some people get labeled ADHD when they have something else. But the bigger failure? People who have ADHD and can’t get a diagnosis at all.

Why “Overdiagnosis” Is a Myth That Hurts You

Here’s why this matters if you have ADHD (or suspect you do).

The overdiagnosis narrative creates real barriers. When doctors, employers, and family members believe ADHD is being handed out like candy, they become gatekeepers. They question whether you really need that assessment. They wonder if you’re just looking for stimulants. They suggest you “try harder.”

I spent two years convincing myself I didn’t “really” have ADHD because the internet told me everyone was getting diagnosed these days. Two years of abandoned planners, missed deadlines, and shame spirals that could have been shorter.

The Cambridge University press release puts it bluntly: Prof Ford noted that while more people with ADHD are being recognized and treated, many more are not being supported. The costs of untreated ADHD include increased risk of academic failure, substance abuse, and injury.

That’s not “everyone has ADHD now.” That’s “not enough people with ADHD are getting help.”

What Underdiagnosis Looks Like in Real Life

Underdiagnosis isn’t just a statistic. It’s the years you spent thinking you were lazy. The jobs you lost because you couldn’t manage time. The relationships that suffered because you forgot things that mattered to people you love.

For adults especially, less than 20% of those with ADHD have received a diagnosis or treatment. That means roughly 4 out of 5 adults with ADHD are managing without any support, clinical or otherwise.

Women and people diagnosed as adults are hit hardest. The diagnostic criteria were built around hyperactive boys in classrooms. If your ADHD looks like daydreaming, chronic lateness, or emotional dysregulation instead of bouncing off walls, you may have slipped through every screening for decades.

If you’re reading this site, you’re probably already looking for strategies. That impulse is valid. The study confirms it’s rational.

How This Affects Access to Diagnosis and Tools

The overdiagnosis myth has practical consequences for getting help.

NHS and healthcare wait times. In the UK, ADHD assessment waiting lists stretch to years in some regions. The study acknowledges that long waits push people toward private assessments, which vary wildly in quality. Poor-quality private assessments are part of what fuels the misdiagnosis concern, which then feeds back into the “overdiagnosis” narrative. It’s circular.

Insurance and employer skepticism. In the US, some insurance providers still treat ADHD as a “trendy” diagnosis. Workplace accommodations get questioned. The more the overdiagnosis myth circulates, the harder it becomes to access what you need.

Self-doubt. Maybe the most damaging effect. If you’ve been told ADHD is overdiagnosed, you might delay seeking assessment. You might minimize your struggles. You might power through with sheer willpower until burnout forces the issue.

This study gives you evidence to push back against all of that. Print it out. Bookmark the paper. Send it to whoever needs convincing.

What to Do If You Suspect You Have ADHD

If this study is making you reconsider whether to pursue an assessment, here’s a practical path forward.

1. Document your symptoms for two weeks. Not in a journal you’ll abandon (I know, I know). Use a voice capture app and talk into it whenever you notice ADHD-like patterns: forgotten tasks, time blindness, hyperfocus episodes, emotional reactivity. You’ll have concrete examples for your appointment.

2. Request an assessment from your GP or primary care provider. Bring your documented examples. Be specific. “I lost track of time and missed three meetings this month” is more useful than “I can’t focus.”

3. Prepare for the wait. If the wait is months or longer, start building systems now. You don’t need a formal diagnosis to try ADHD-friendly productivity strategies. The evidence-based approaches work whether you have a diagnosis or not.

4. Don’t let perfect be the enemy of functional. A diagnosis opens doors to medication and formal accommodations. But the productivity tools and strategies on this site work regardless of diagnostic status. Start where you are.

Productivity Tools Don’t Require a Prescription

One thing I wish someone had told me during my pre-diagnosis years: you don’t need a doctor’s note to use a task manager.

The tools we review on this site exist because ADHD brains work differently. Period. Whether you’re formally diagnosed, self-identified, or just someone who finds neurotypical productivity advice useless, the strategies are the same.

If you struggle with time blindness, time awareness apps can help you see where hours actually go.

If you can’t break big tasks into small ones, AI task breaker apps do the executive function work for you.

If you need external accountability, body doubling apps provide presence without pressure.

None of these require a diagnosis. All of them work better when you stop questioning whether you “deserve” to use them.

The Misdiagnosis Problem Is Real (But Different)

The study makes a careful distinction worth understanding. Overdiagnosis means too many people getting diagnosed. Misdiagnosis means some people getting the wrong diagnosis.

Misdiagnosis happens when:

• Assessments are rushed or low-quality
• Clinicians don’t follow national diagnostic guidelines
• Symptoms of anxiety, depression, or trauma get confused with ADHD
• Assessments don’t consider the full picture

The fix isn’t fewer diagnoses. It’s better ones. The researchers argue for improved training, standardized assessments, and better adherence to guidelines. More rigor, not more skepticism.

If you’ve been diagnosed and treatment is working, your diagnosis is probably accurate. If you’ve been diagnosed and nothing helps, it’s worth exploring whether something else is going on too. ADHD rarely travels alone. Anxiety, depression, and sleep disorders frequently show up alongside it. Each needs its own treatment plan.

The takeaway here isn’t “trust every diagnosis blindly.” It’s “don’t dismiss every diagnosis reflexively.” There’s a big gap between those two positions, and the study plants its flag firmly in the middle: diagnose more carefully, but diagnose more people.

What This Means Going Forward

This paper will be cited in policy discussions, media coverage, and clinical guidelines for years. It shifts the conversation from “are we diagnosing too much?” to “are we diagnosing enough?”

For those of us managing ADHD daily, the practical takeaway is straightforward.

Your ADHD is real. A major peer-reviewed study in a top psychiatric journal confirms that the “everyone has ADHD” dismissal has no evidence behind it.

Seeking diagnosis is responsible, not trendy. If you’ve been putting it off because you thought you were jumping on a bandwagon, reconsider. The data says most people with ADHD still aren’t getting identified.

Tools and strategies are for you. Whether you have a formal diagnosis or not. Whether you take medication or not. If neurotypical advice doesn’t work for your brain, ADHD-specific strategies might.

Your Next Step

Pick one thing from this article and act on it today. If you’ve been delaying an assessment, call your doctor’s office. If you already have a diagnosis but haven’t tried ADHD-specific tools, start with the dopamine menu system. It takes 10 minutes to set up and doesn’t require any apps.

If you just needed someone to say “your ADHD is valid and you’re not making it up,” consider this that moment. The science is on your side.

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Written by someone who spent two years thinking they were faking it. They weren’t.