填空题 "The amount of sleep you get impacts 1 , your risk for accidents, how you perform 2 ," said James Walsh, president of the National Sleep Foundation, a non-profit that advocates for 3 . "There"s much more to 4 than how long you live."
The study used data from an extensive survey conducted by the American Cancer Society 5 . Women sleeping 6 had 13 percent, 23 percent and 7 dying, respectively, than those who slept 7 hours, 8 .
Men sleeping 8, 9 and 10 hours a night had 12 percent, 9 and 34 percent greater risk of dying 10 .
By contrast, sleeping 11 a night increased the risk for women by only 5 percent, and for men, by 11 percent. Among people who slept just three hours 12 , women had a 13 increase in death, and men had a 19 percent increase, compared with those who slept 7 hours.
The study also found that taking 14 every day increased the risk of death by 25 percent.
Kripke, whose study 15 federal tax dollars, recommended that people should not 16 take pills to get eight hours of sleep.
Donald Bliwise, a 17 at Emory University, in Atlanta, said studies had shown that when 18 to sleep however long they wanted, without cues from alarm clocks and watches, 19 14 to 15 hours a day for the first few days.
"Everyone," Bliwise said, "walks around 20 sleep deprived."