Aging: 5 hours ≤ sleep, 45% increased risk of dementia

According to the World Health Organization, the global rate of sleep disorders is 27%, and in China, the rate of insomnia among adults is as high as 38.2%.
, however, sleep disorders are extremely harmful to health, including cardiovascular disease, metabolic diseases, stroke and Alzheimer's disease.
, sleep disorders and lack of sleep are common in older adults and are associated with the development of dementia and all-cause mortality.
To study the link between sleep disorders and lack of sleep and the risk of dementia and death, researchers from Bregan Women's Hospital recently conducted a new study that included 2 people aged 65 and 65 from the National Institutes of Health and Aging Trends (NHATS). The 812 participants were asked about sleep disorders and lack of sleep, including alertness, nap frequency, sleep duration, sleep quality, sleep time and snoring, as well as information about participants' outcomes, such as the onset of dementia and causes of death.
found a close relationship between sleep disorders and lack of sleep and dementia over time.
Compared to 7-8 hours of sleep per night, participants who slept ≤5 hours and fell asleep for 30 minutes had a 45 percent increased risk of developing dementia, and daily difficulty maintaining alertness, naps, poor sleep quality and very short sleep durations were associated with all-cause mortality.
relationship between sleep characteristics and dementia, the study assessed a range of sleep characteristics and risk and all-cause mortality in older adults.
longer sleep duration and shorter sleep duration can predict the risk of dementia, while short sleep durations, difficulty in maintaining alertness, naps and poor sleep quality can predict all-cause mortality.
sleep duration is a powerful indicator of dementia events and all-cause mortality, suggesting that sleep time may be an important sleep feature and higher than other predictive factors.