• Self-reported sleeplessness in 12,655 persons living in the north of Norway: The Tromsø Study. 

      Fetveit, Arne; Straand, Jørund; Bjorvatn, Bjørn; Kristoffersen, Espen Saxhaug (Peer reviewed; Journal article, 2019)
      Sleep disturbances cause great impairment in quality of life. In this cross-sectional study, we analysed questionnaire-collected data from 12,655 persons (30-87 years) who participated in the sixth survey of the Tromsø ...
    • Sleep disturbances in an arctic population: The Tromsø Study 

      Fetveit, Arne; Straand, Jørund; Bjorvatn, Bjørn (Peer reviewed; Journal article, 2008-05-29)
      Background Prevalence estimates for insomnia range from 10 to 50% in the adult general population. Sleep disturbances cause great impairment in quality of life, which might even rival or exceed the impairment in other ...