Disturbing dreams and dementia incidence across diverse cohort studies: A COSMIC collaboration study - PubMed
4 hours ago
- #sleep-disorders
- #Alzheimer's-disease
- #dementia
- Distressing dreams were previously linked to all-cause dementia in older, predominantly white US men.
- This study investigated the association between disturbing dreams (nightmares and bad dreams) and dementia incidence in a diverse international cohort aged 60-89.
- Data from six longitudinal studies across Brazil, China, France, Italy, South Korea, and Taiwan (n=10,238, 42.5% men) were analyzed.
- 24.2% of participants reported disturbing dreams, with all-cause dementia and Alzheimer's disease (AD) incidence rates of 10.8 and 5.3 per 1000 person-years, respectively.
- In fully adjusted analyses, disturbing dreams were associated with increased all-cause dementia incidence among 60-69-year-olds (HR 3.93, 95% CI 1.32-11.67).
- Weekly disturbing dreams were linked to AD only in men (HR 3.59, 95% CI 1.44-8.96).
- No significant associations were found for older individuals.
- The study suggests potential links between disturbing dreams and dementia in younger seniors and AD in men, but underlying mechanisms remain unclear.