A.D.H.D. is usually discussed as a childhood diagnosis that some people carry into adulthood and others outgrow. In a reported explainer for The Times, Dana G. Smith works through the research on what actually happens across a lifetime, and the more accurate picture is of a condition that keeps moving: symptom types shift with age, symptoms wax and wane, and whether a given person clears the diagnostic threshold is not stable from one year to the next.
The piece opens on a household with four diagnoses — two sons aged 8 and 10, a mother of 37 and a father of 41 — managed with medication, to-do lists and whiteboards in every room for task management and communication. (“I joke that our house is half house, half classroom, half occupational therapist office,” the mother says.) She was diagnosed two years ago, after recognizing her sons’ symptoms in her younger self: “I didn’t know that the reason that it took me five hours to do my homework every night wasn’t because I wasn’t smart or because I didn’t try hard enough. It’s because my brain was working against me.”
Persistence is less predictable than the standard number
The frequently cited figure is that about half of children with A.D.H.D. continue to have it as adults, with persistence more likely after severe childhood cases and overlapping conditions. A 2021 longitudinal study that followed children for sixteen years found something messier. Only about 10 percent achieved “sustained remission” into young adulthood and another 10 percent had it the entire time; for the large majority, symptoms waxed and waned. At any given moment roughly half the participants met the criteria for A.D.H.D. — but which half kept changing. The diagnosis is drawn from a symptom checklist rather than a measurement, so some of that movement is people crossing a line rather than a condition switching on and off.
Diagnoses are rising in both children and adults, and the article notes that some psychiatrists worry the condition is now overdiagnosed. The piece does not press on that question further.
The profile changes with age
There are two symptom categories — inattentive (unfinished tasks, forgetfulness, messiness) and hyperactive-impulsive (fidgeting, difficulty waiting a turn, excessive talking). Children need six or more symptoms from a category, people 17 and older five; meeting both makes it combined A.D.H.D.
Young children skew hyperactive-impulsive, which is hard to miss in a preschooler who, as the University of Kentucky psychologist Michelle Martel puts it, is “getting into everything and running around the room.” Once school imposes structure and expectations, inattentive symptoms become more common and more persistent while hyperactivity declines in some children. A large 2023 review found presentations split roughly evenly under 12; by adolescence, inattentive cases dominate and fewer than a quarter of teenagers are primarily hyperactive-impulsive. Predominantly hyperactive-impulsive A.D.H.D. is rare in adults — one small study put it at 7 percent, with most adults presenting a combination.
The shape of the symptoms changes too. Dr. Deepti Anbarasan of N.Y.U. Grossman School of Medicine describes adult hyperactivity as an internal restlessness rather than a visible one — a persistent need to be busy — and adult inattention as trouble with life logistics, chores with no deadline, and losing the thread in meetings or with a spouse.
Why it moves
Three explanations get airtime. Environment matters: household strain such as parental divorce is associated with worse symptoms in children and adolescents, a rigid school setting can aggravate inattention, and a job that suits someone’s temperament can ease it. Coping matters: people find workarounds, and the experts describe a rough split in which hyperactive-impulsive symptoms respond more to behavioral intervention and inattentive symptoms more to medication, with combined cases usually needing both. And development matters: neuroimaging research suggests part of the change tracks brain maturation, with one recent study finding that children whose symptoms improved over two years followed a different developmental pattern from those whose symptoms persisted.
“Some children just grow out of it,” the UC Irvine pediatrics professor James Swanson says. “You start with a group and you follow them over time, the symptoms decrease with age. That’s just an age-related effect. I call it maturation.”
What the piece leaves open
The 10 percent sustained-remission figure rests on a single longitudinal study, and the persistence numbers are described as commonly cited rather than settled. The overdiagnosis worry is stated without data. The treatment-modality split is expert summary without effect sizes, and the brain-development finding is one recent study framed as suggestive. What the reporting does establish is narrower and more useful than the “do they grow out of it” framing allows: the condition that gets diagnosed in childhood is not the one that shows up in a 40-year-old, and a single point-in-time diagnosis is a poor description of either.
Read the full story at The New York Times.