Around the World: Health
China Daily | Updated: 2008-11-12 07:42
Less sleep bad for elderly
Sleeping less than 7.5 hours a day may raise the risk of heart disease in elderly people, especially those who have elevated blood pressure at night, a study in Japan has found.
Scientists monitored sleeping patterns of 1,255 elderly people with hypertension and of an average age of 70.4, and followed them for 50 months.
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