Daily Mail | Do YOU sleep for more than 9 hours? It could be dementia | Daily ... Daily Mail People who consistently slept for more than nine hours each night were twice as likely to develop Alzheimer's or other forms of dementia, researchers from ... Sleeping for over nine hours 'could be a sign of Alzheimer's' - ITV.com Study finds prolonged sleep may predict dementia risk Healthy Heart in Midlife May Lower Dementia Risk Later |