• Associations between utilization rates and patients’ health: a study of spine surgery and patient-reported outcomes (EQ-5D and ODI) 

      Rudolfsen, Jan Håkon; Solberg, Tore; Ingebrigtsen, Tor; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-22)
      <i>Background</i> - A vast body of literature has documented regional variations in healthcare utilization rates. The extent to which such variations are “unwarranted” critically depends on whether there are corresponding variations in patients’ needs. Using a unique medical registry, the current paper investigated any associations between utilization rates and patients’ needs, as measured by two ...
    • High lactose whey cheese consumption and risk of colorectal cancer - The Norwegian Women and Cancer Study 

      Barnung, Runa Borgund; Jareid, Mie; Lukic, Marko; Oyeyemi, Sunday Oluwafemi; Rudolfsen, Jan Håkon; Sovershaeva, Evgeniya; Skeie, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-22)
      The incidence of colorectal cancer (CRC) has increased among Norwegian women, and is among the highest in the world. In order to understand this increase, country specific dietary exposures have been investigated. The aim of this study was to quantify the association between consumption of brown cheese, a common bread topping in Norway, and colorectal, colon, and rectal cancer in the prospective ...
    • A nationwide study of patients operated for cervical degenerative disorders in public and private hospitals 

      Danielsen, elisabeth; Mjåset, Christer; Ingebrigtsen, Tor; Gulati, Sasha; Grotle, Margreth; Rudolfsen, Jan Håkon; Nygaard, Øystein Petter; Solberg, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-27)
      During the last decades, there has been an increase in the rate of surgery for degenerative disorders of the cervical spine and in the use of supplementary private health insurance. Still, there is limited knowledge about the diferences in characteristics of patients operated in public and private hospitals. Therefore, we aimed at comparing sociodemographic-, clinical- and patient management data ...
    • Regional Variation in Utilisation of Healthcare Services - A study on hospital care in Norway 

      Rudolfsen, Jan Håkon (Doctoral thesis; Doktorgradsavhandling, 2023-02-28)
      <p><i>Background:</i> In 1938, J. Alison Glover published a study on incidence of tonsillecto-mies in school children, demonstrating variation in treatment rates across school districts. Consequently, it rates raised questions as to what determines when to treat a patient. After Wennberg and Gittelsohns’ paper ‘Small Area Variations in Health Care Delivery’ was pub-lished in 1973, it became clear ...
    • Related variations: A novel approach for detecting patterns of regional variations in healthcare utilisation rates 

      Rudolfsen, Jan Håkon; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-22)
      Regional variations in healthcare utilisation rates are ubiquitous and persistent. In settings where an aggregate national health service budget is allocated primarily on a per capita basis, little regional variation in total healthcare utilisation rates will be observed. However, for specific treatments, large variations in utilisation rates are observed, iymplying a substitution effect at some ...