--- title: ADHD Is Linked to Higher Risk of Dementia or Mild Cognitive Impairment After 50 description: A University of Pittsburgh study of 187,341 adults over 50 found ADHD was linked to higher rates of mild cognitive impairment or dementia. author: Dr Marina Nani (Editor-in-Chief) date: 2026-10-15T13:34:24.659Z updated: 2026-10-15T13:34:24.668Z canonical: https://richhealthmagazine.com/article/adhd-dementia-risk-pittsburgh-study image: https://cdn.nanimediahouse.com/pexels-elderly-person-writing-in-a-notebook-at-an-ornate-outdoor-ta-6414621.jpg categories: Longevity & Science content_type: News region: United States publication: Rich Health Magazine schema_type: Article --- Adults over 50 with ADHD had more than four times the hazard of developing mild cognitive impairment or dementia as people without the condition, according to a University of Pittsburgh study of 187,341 Americans published on Oct. 7 in JAMA Psychiatry. In plain counts, 203 of the 3,026 participants with an ADHD diagnosis developed cognitive impairment over an average follow-up of about 10 years, roughly double the rate among everyone else. The larger figure, a hazard ratio of 4.60, comes from the researchers' adjusted statistical models. Because the researchers observed people over time rather than running a trial, the study shows a link, not a cause. The participants came from All of Us, a National Institutes of Health research program that pairs volunteers' health records with their genetic data. Their average age was 56, and 57% were women. ## Researchers Still Found the Link When Eight Years Separated the Diagnoses One possible explanation was that early, undetected dementia symptoms had been mistaken for ADHD before anyone diagnosed a cognitive problem. To test it, the team required [at least eight years to pass](https://www.medschool.pitt.edu/news/adhd-tied-higher-risk-dementia-pitt-research-finds) between the ADHD diagnosis and the start of cognitive impairment. The association remained statistically significant, which the university says makes that explanation less likely to account for the whole effect. Further adjustments for other health conditions, education and how much people used health care weakened the association but did not remove it. ## People With the Highest Genetic Risk Scores for ADHD Had a 35% Higher Risk of Cognitive Impairment The team also scored every participant on common gene variants associated with ADHD, whether or not they had ever been diagnosed. Those in the top fifth of scores had a 35% higher hazard of cognitive impairment than those in the bottom fifth. “This doesn't prove that ADHD causes dementia, but seeing the same pattern show up independently in medical records and in people's genes gives us greater confidence that the association is not simply an artifact of how ADHD gets diagnosed,” said Tharick A. Pascoal, the study's senior author and an associate professor of psychiatry and of neurology at Pitt. ## An Israeli Study of 109,218 People Linked Adult ADHD to Dementia in 2023 Researchers in Israel reported a comparable link in JAMA Network Open in 2023, after following 109,218 members of a nonprofit health maintenance organization, all born between 1933 and 1952, from 2003 to 2020. Those diagnosed with ADHD as adults had 2.77 times the hazard of dementia after adjustment. “We're replicating a pattern that's been observed in other countries, now in a large U.S. sample, and adding genetic evidence on top of it,” said Douglas Teixeira Leffa, a co-author who recently completed his psychiatry residency at UPMC. ## People Who Also Had ADHD Fared Worse After a Cognitive Diagnosis Among participants who did develop cognitive impairment, those with ADHD reported worse mental health, lower quality of life and less social satisfaction, and they used about 20% more health care in the year after their diagnosis. The authors conclude that the findings support “the need for targeted monitoring and integrated care” for this group. The Pittsburgh researchers say several questions remain unanswered, including whether ADHD medications such as stimulants might lower dementia risk over time, and whether managing cardiovascular health, already linked to both ADHD and dementia, could help. Separate research has linked [midlife blood pressure, diabetes and smoking](https://richhealthmagazine.com/article/midlife-risk-factors-13-dementia-free-years) to the number of years people live free of dementia. ## FAQ **Q: How likely is someone with ADHD to get dementia?** Most people with ADHD in the large studies so far did not develop it. In the 2023 Israeli study, 96 of the 730 people diagnosed with ADHD (13.2%) developed dementia between 2003 and 2020, compared with 7.0% of those without the diagnosis. Everyone in that study was 51 to 70 years old at the start. **Q: Are you more prone to Alzheimer's if you have ADHD?** The new study's main result combined mild cognitive impairment and dementia of any kind, so it does not single out Alzheimer's disease. In earlier work published in 2022, Pascoal's lab linked genetic risk for ADHD to Alzheimer's-related brain changes in older adults who had no cognitive problems. **Q: Does ADHD medication lower dementia risk?** That is not yet known; the Pittsburgh researchers list it among the questions their study leaves open. In the 2023 Israeli study, adults with ADHD who received psychostimulant medication showed no clear increase in dementia risk, but the researchers observed patients rather than assigning treatment, so the result does not show the medication protects against dementia.