Closer | Sleeping longer than 9 hours could be a sign of dementia New Zealand Herald Sleeping for more than nine hours a night could be an early warning sign of Alzheimer's disease. Scientists found people who consistently spend this long in bed are twice as likely to develop dementia over the next decade. A change in sleep patterns is ... REVEALED: How oversleeping is linked to dementia later in life Sleeping nine hours a night (or more) could DOUBLE your risk of dementia People who sleep longer may develop dementia |