Mini-strokes linked to higher long-term dementia risk

A large Canadian study has identified a link between transient ischemic attacks (TIAs), commonly known as mini-strokes, and an increased long-term risk of dementia. Published in the journal Neurology, the research analyzed approximately 20 years of health records from over 110,000 individuals in Ontario who experienced their first TIA.

Researchers found that individuals who experienced a TIA had a 34% higher overall risk of dementia compared to those who had neither a TIA nor a full stroke. During an average seven-year follow-up, approximately 19% of TIA patients were diagnosed with dementia, compared to 15% of the control group. The risk was particularly pronounced in the first year following the event, where TIA patients showed a 75% higher risk of dementia diagnosis than those without a history of stroke or TIA.

While the study establishes a significant correlation, researchers noted it does not prove that TIAs directly cause dementia. The study, led by Dr. Raed A. Joundi of McMaster University and the Population Health Research Institute, suggests that while most post-TIA care focuses on stroke prevention, the potential for cognitive decline warrants closer attention.