Study Links Insomnia to Increased Risk of Stroke and Other Health Issues

A recent international review conducted by the European Academy of Neurology, in collaboration with MedUni Vienna, suggests that insomnia may indicate heightened health risks, including a higher likelihood of stroke and increased hospital admissions. The findings were published in the journal "Sleep Medicine Reviews" on September 28, 2026.

The research team consolidated evidence across seven categories: dementia, stroke, depression, suicidal behavior, mortality, workplace accidents, and hospital admissions. They also performed new systematic reviews specifically focusing on stroke, workplace accidents, and hospital admissions.

For their analysis on stroke, the researchers reviewed nine studies encompassing over 1.3 million participants, with six included in a meta-analysis. It was determined that individuals with insomnia face a 26% higher risk of experiencing a stroke. Additionally, an analysis of five studies indicated that those with insomnia are 28% more likely to be hospitalized.

The study also found connections between insomnia and various neurological and mental health issues. Systematic reviews revealed associations between insomnia and dementia, particularly Alzheimer’s disease, as well as with depression and suicidal behavior, although results varied across different outcomes.

Stefan Seidel, a neurologist and sleep specialist from MedUni Vienna, emphasized the importance of recognizing sleep issues in discussions about brain health. He advocated for increased awareness and treatment of insomnia, urging that it be incorporated into health promotion initiatives in communities, schools, and workplaces.

The authors note that their findings do not establish a direct causal relationship between insomnia and the health issues examined. Limitations include varying definitions of insomnia and potential confounding factors, such as the use of sleep medications. Nevertheless, the results support considering insomnia as a potential warning signal regarding brain and mental health.

The publication details are as follows: Vignatelli L, Leone MA, Pupillo E, Seidel S, et al. "Insomnia as a risk factor for brain, mental and general health consequences: an umbrella systematic review." Sleep Medicine Reviews, 2026. DOI: 10.1016/j.smrv.2026.102372.