Sleep data from over 220,000 people reveal global differences in weekly sleep variability and sleep extension

People in Asia are known to report worse sleep than their counterparts in Europe and North America. New research, using objective measures of sleep rather than subjective reports, has shown that not only do people in Asia go to sleep later and have shorter sleep, they also have lower sleep quality than those in other parts of the world. Additionally, their sleep during the work week is more variable and they do not extend their sleep as much at the weekend.

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