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Sleeping more than eight hours a day is associated with a higher risk for stroke, a new study has found. 一项新研究发现，每天睡眠超过八小时与更大中风风险有关联。 Researchers studied 9,692 people, ages 42 to 81, who had never had a stroke. The study tracked how many hours a night the people slept at the beginning of the study and how much nightly sleep they were getting four years later. Over the 10-year study, 346 of the study subjects suffered strokes. 研究对象为9692名42岁至81岁的人，研究开始前他们从未发生过中风。研究人员记录了这些人在研究开始时及四年后每晚的睡眠时间。在十年的研究中，有346名研究对象中风。 After controlling for more than a dozen other health and behavioral variables, the researchers found that people who slept more than eight hours a day were 46 percent more likely to have had a stroke than those who slept six to eight hours. 在控制了十多项其他健康和行为变量之后，研究者们发现，每晚睡眠超过八小时的人比睡六至八小时的人患中风的可能性高46%。 The study, published online last week in Neurology, also found that the risk of stroke was higher among people who reported that their need for sleep had increased over the study period. 这项研究上周发表在《神经学》周刊(Neurology)的网站上。研究还发现，在研究过程中，自称睡眠需求增大的人中风的风险更大。 | 
