Researchers from institutions across the United Kingdom analysed 19 existing studies published between 2012 and 2025, covering populations in the United States, Canada, Sweden, Taiwan, the United Kingdom, Finland and Denmark. Together, the data encompassed more than 15.9 million participants, allowing the team to pool results and identify patterns less likely to occur by chance.
The pooled analysis found that people with ADHD had a 70 percent higher hazard of death from any cause compared to people without the condition. The risk of death from suicide was 90 percent higher, the risk of death from unintentional or intentional injury was 50 percent higher, and even the risk of death from natural causes was 30 percent higher. These findings generally align with an earlier review, though that review did not find evidence for increased mortality from natural causes. The authors suggested the difference may reflect the inclusion of more recent studies or variations in study designs.
Encouragingly, the review also found that prescription medications used to treat ADHD, primarily stimulants, were associated with a lower risk of death from any cause in ADHD populations. The study did not distinguish between effects of different medications.
The researchers cautioned that the methods are not intended to show cause and effect, and that the observed associations may be influenced by factors such as gender balance across studies, cultural attitudes, healthcare differences between countries, and changes in ADHD diagnosis and management over time. "Pooled estimates should be interpreted as average associations across diverse populations and study contexts rather than as being universally applicable," the authors noted.
The review highlights that multiple factors may increase mortality risk for people with ADHD. The researchers concluded that the evidence reinforces the importance of support for managing health risks in this population and attention to addressing structural determinants of poor health disproportionately experienced by people with ADHD.
