Frequent Daytime Napping Tied to Higher Dementia Risk in Older Adults
A study following more than 990 Medicare recipients aged 65 and older for up to a decade found that those who napped most days or daily had a 48% greater dementia risk than those who seldom or never napped. Unintentional naps and naps lasting 30 minutes or less were also associated with increased risk. Researchers caution that the relationship may be bidirectional and does not prove causation.
The research tracked more than 990 Medicare enrollees aged 65 and older beginning in 2013, following them for as long as ten years. None had dementia when the study began. Investigators compared napping patterns with later diagnoses and reported higher dementia incidence among those who napped most days or daily, those who nodded off unintentionally, and those whose naps lasted half an hour or less.
The authors propose a possible two-way link. Daytime sleep might signal or contribute to risk, while early dementia could disturb brain systems controlling alertness and thereby increase napping. They stress that the design cannot establish cause and effect, and call for larger, longer studies. The work appeared in the Journals of Gerontology.
Findings may prompt older adults and caregivers to view frequent or unintentional napping as a possible warning sign, potentially encouraging earlier cognitive screening. Clinicians could use sleep patterns as an accessible conversation prompt, though causation remains unproven. If confirmed, this might influence dementia prevention research and caregiver planning, but it may also cause unnecessary worry; balanced messaging may matter.