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      Mortality Associated With Sleep Duration and Insomnia

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      Archives of General Psychiatry
      American Medical Association (AMA)

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          Abstract

          Patients often complain about insufficient sleep or chronic insomnia in the belief that they need 8 hours of sleep. Treatment strategies may be guided by what sleep durations predict optimal survival and whether insomnia might signal mortality risks. In 1982, the Cancer Prevention Study II of the American Cancer Society asked participants about their sleep duration and frequency of insomnia. Cox proportional hazards survival models were computed to determine whether sleep duration or frequency of insomnia was associated with excess mortality up to 1988, controlling simultaneously for demographics, habits, health factors, and use of various medications. Participants were more than 1.1 million men and women from 30 to 102 years of age. The best survival was found among those who slept 7 hours per night. Participants who reported sleeping 8 hours or more experienced significantly increased mortality hazard, as did those who slept 6 hours or less. The increased risk exceeded 15% for those reporting more than 8.5 hours sleep or less than 3.5 or 4.5 hours. In contrast, reports of "insomnia" were not associated with excess mortality hazard. As previously described, prescription sleeping pill use was associated with significantly increased mortality after control for reported sleep durations and insomnia. Patients can be reassured that short sleep and insomnia seem associated with little risk distinct from comorbidities. Slight risks associated with 8 or more hours of sleep and sleeping pill use need further study. Causality is unproven.

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          Author and article information

          Journal
          Archives of General Psychiatry
          Arch Gen Psychiatry
          American Medical Association (AMA)
          0003-990X
          February 01 2002
          February 01 2002
          : 59
          : 2
          : 131
          Article
          10.1001/archpsyc.59.2.131
          11825133
          319d25eb-48af-409c-b8af-9c2bcfbadd17
          © 2002
          History

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