• A 60-year follow-up of the incidence and prevalence of multiple sclerosis in Hordaland County, Western Norway 

      Grytten, Nina; Aarseth, Jan Harald; Lunde, Hanne Marie; Myhr, Kjell-Morten (Peer reviewed; Journal article, 2015-01-14)
      Objective: Investigate the incidence of multiple sclerosis during 1953–2013 and estimate the prevalence rate of MS on 1 January 2003 and 2013 in Hordaland County, Western Norway. Methods: All patients with onset of disease ...
    • The economic impact of multiple sclerosis to the patients and their families in Norway 

      Svendsen, Bjørn; Grytten, Nina; Bø, Lars; Aarseth, Hallvard Gilje; Smedal, Tori; Myhr, Kjell-Morten (Peer reviewed; Journal article, 2018-12)
      Background: Multiple sclerosis (MS) imposes high economic costs on society, but the patients and their families have to bear some of these costs. Objective: We aimed to estimate the magnitude of these economic costs in ...
    • Incidence of cancer in multiple sclerosis before and after the treatment era– a registry- based cohort study 

      Grytten, Nina; Myhr, Kjell-Morten; Celius, Elisabeth Gulowsen; Benjaminsen, Espen; Kampman, Margitta T.; Midgard, Rune; Vatne, Anita; Aarseth, Jan H.; Riise, Trond; Torkildsen, Øivind (Journal article; Peer reviewed, 2021)
      Background: Whether disease-modifying therapies (DMTs) influence cancer in multiple sclerosis (MS) is uncertain. Objectives: Assess incidence of cancer diagnosis among Norwegian MS patients compared to the general ...
    • Level of education and multiple sclerosis risk over a 50-year period: Registry-based sibling study 

      Bjørnevik, Kjetil; Riise, Trond; Benjaminsen, Espen; Celius, Elisabeth Gulowsen; Dahl, Ole-Petter; Kampman, Margitta Theodora; Løken-Amsrud, Kristin Ingeleiv; Midgard, Rune; Myhr, Kjell-Morten; Torkildsen, Øivind; Vatne, Anita; Grytten, Nina (Peer reviewed; Journal article, 2017)
      Background: The conflicting results from studies on socioeconomic status (SES) and multiple sclerosis (MS) risk might be due to a change in the distribution of environmental exposures over time or to methodological limitations ...
    • Survival and cause of death in multiple sclerosis: A 60-year longitudinal population study 

      Lunde, Hanne Marie; Assmus, Jörg; Myhr, Kjell-Morten; Bø, Lars; Grytten, Nina (Peer reviewed; Journal article, 2017)
      Objective: Survival and causes of death (COD) in multiple sclerosis (MS) provide ultimate endpoints. We aimed to investigate survival and COD in a 60-year population-based MS cohort compared with the general population. ...
    • Time trends in the incidence and prevalence of multiple sclerosis in Norway during eight decades 

      Grytten, Nina; Torkildsen, Øivind; Myhr, Kjell-Morten (Peer reviewed; Journal article, 2015-06-05)
      Norway has been subjected to numerous epidemiological investigations on the prevalence and incidence of multiple sclerosis (MS), dating back to 1935. The objective of this study was to review the studies on the prevalence ...
    • Validation of the multiple sclerosis diagnosis in the Norwegian Patient Registry 

      Benjaminsen, Espen; Myhr, Kjell-Morten; Grytten, Nina; Alstadhaug, Karl Bjørnar (Peer reviewed; Journal article, 2019-11-13)
      Background: Health registries may yield important data for epidemiological studies. However, in order to be a valuable source for information, the registered data have to be correct. Objectives: The aim of the study was ...