A meta-analysis published in JAMA Network Open analyzed overnight sleep data from more than 7,000 adults across five long-term studies and reported that sleep-based estimates of brain aging were associated with later dementia diagnoses, according to the study. None of the participants had dementia at the start of the research, the study stated.
Researchers reported that each 10-year gap between a sleep-derived “brain age” estimate and a person’s actual age was associated with about a 39% higher risk of dementia, according to the study, as reported by mindbodygreen on October 30, 2026. The findings were published in JAMA Network Open and described in the mindbodygreen report.
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