The Surprising Link Between Bedtime and Dementia

Researchers in China, Sweden, and the UK looked at sleep data of 1,982 Chinese individuals with an average age of 70. Those in bed for more than 8 hours were far more likely to show a cognitive decline during a Mini Mental State Examination (MMSE) Those aged 60-74 were most affected. Early-mid evening hours were deemed riskiest, with every 1 hour advance in bedtime associated with a 25% increased risk of dementia. Sleep can influence physical and mental health and is linked to conditions from heart disease to depression and obesity.

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