• Month of birth and risk of multiple sclerosis: confoundingand 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 (Peer reviewed; Journal article, 2014-02)
      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 ...
    • Natural Variation of Vitamin D and Neurofilament Light Chain in Relapsing-Remitting Multiple Sclerosis 

      Røsjø, Egil Rørvik; Lindstrøm, Jonas Christoffer; Holmøy, Trygve; Myhr, Kjell-Morten; Varhaug, Kristin Nielsen; Torkildsen, Øivind Fredvik (Journal article; Peer reviewed, 2020-04-30)
      Background: High serum levels of 25-hydroxyvitamin D (25(OH)D) have been found among patients with a favorable disease course in relapsing-remitting MS (RRMS), indicating that this may limit clinical deterioration. Clinical ...