• Comorbidity in multiple sclerosis patients from Nordland County, Norway - validated data from the Norwegian Patient Registry 

      Benjaminsen, Espen; Myhr, Kjell-Morten; Torkildsen, Nina Agnethe Grytten; Alstadhaug, Karl Bjørnar (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-16)
      <p><i>Background:</i> Knowledge of comorbid disorders is important to optimize therapy for multiple sclerosis (MS), but data are limited. The aim of this study was to assess comorbidity in persons with MS living in Nordland County on January 1, 2017. <p><i>Methods:</i> Data were retrieved from the Norwegian Patient Registry (2008-2017) and validated through review of electronic hospital charts ...
    • Month of birth and risk of multiple sclerosis: confounding and adjustments 

      Torkildsen, Øivind Fredvik; Aarseth, Jan Harald; Benjaminsen, Espen; Celius, Elisabeth Gulowsen; Holmøy, Trygve; Kampman, Margitta Theodora; Løken-Amsrud, Kristin Ingeleiv; Midgard, Rune; Myhr, Kjell-Morten; Riise, Trond; Torkildsen, Nina Agnethe Grytten (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      A month of birth effect on multiple sclerosis (MS) risk has been reported from different countries. Recent critics have suggested that this finding is caused by confounding and that adequately adjusting for year and place of birth would markedly reduce this effect. All inhabitants in Norway are registered in the Norwegian Population Registry (Statistics Norway), making this an ideal area for performing ...