Sleeping less than 6 hours increases dementia risk by 30%, study finds

2025-12-08 17:48:55Lifestyle SHKRUAR NGA REDAKSIA VOX
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According to a new study published in the journal Nature Communications, there is a higher risk of dementia if sleep duration is six hours or less – at the age of 50 and 60 – compared to people who sleep seven hours a night.

After studying nearly 8,000 people for 25 years, the study found that sleeping less than six hours in middle age could increase the risk of dementia.

"Short sleep time between ages 50, 60, and 70 is also associated with a 30% increased risk of developing dementia, independent of sociodemographic, behavioral, cardiometabolic, and mental health factors, including depression," according to the study.

"Sleep is important for normal brain function and is also thought to be important for clearing toxic proteins that build up in the brain," said Tara Spires-Jones, deputy director of the Center for Brain Discovery Sciences at the University of Edinburgh in Scotland.

"Sleep disorders can occur long before the onset of other clinical signs of dementia," said Tom Dening, who directs the Dementia Centre at the Institute of Mental Health at the University of Nottingham in the UK.


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