The risk of dementia is greater in people who sleep six hours or less a night in middle age, a study has found.
Research found that people in their 50s and 60s who lacked normal sleep - defined as seven hours - were 30 per cent more likely to be diagnosed with dementia.
The study by University College London (UCL) examined how sleep patterns in midlife may affect the onset of dementia decades later, The Express reported.
