Higher levels of REM and deep sleep were linked to a reduced risk of many diseases, whereas sleeping less than five hours per night was associated with elevated disease risk, according to a study published on September 17 in the open‑access journal PLOS Medicine by Shengzhi Sun of Capital Medical University in China and co‑authors.
Sleep quantity and quality are priorities of China’s National Health Commission and a nationwide concern. The latest 2026 China Sleep Health White Paper reports that the average Chinese adult sleeps 6.97 hours per night, yet 23% sleep fewer than six hours. Only 26% maintain a regular sleep schedule, and sleep disturbances have risen over time, underscoring the importance of examining how sleep patterns affect disease risk for Chinese residents.
Current knowledge about how specific sleep stages and real‑world sleep patterns influence health outcomes remains limited. This gap arises partly because self‑reported sleep data often differ from objective measurements
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