Previous studies have suggested that people who sleep less than five hours a night have a 15% greater risk of death from all causes than people of the same age who get a goodnight’s sleep. In a survey of workers in Britain, more than 5% claimed to sleep no more than five hours a night. Another survey published in the US in 2010 found that nearly 30% of people claimed to sleep no more than six hours a night.
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What have previous studies suggested?
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Less than five hours a night’s sleep leads to death.
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People who get sufficient sleep do not die of all causes.
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More than 5% of workers in Britain were found sleeping less than five hours a night.
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Nearly 30% of people claimed to have slept around but not more than six hours a night.
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