• Association of adverse childhood experiences with the development of multiple sclerosis 

      Eid, Karine; Torkildsen, Øivind; Aarseth, Jan Harald; Aalstad, Mari; Bhan, Alok; Celius, Elisabeth Gulowsen; Cortese, Marianna; Daltveit, Anne Kjersti Nesje; Holmøy, Trygve; Myhr, Kjell-Morten; Riise, Trond; Schuler, Stephan; Torkildsen, Cecilie Fredvik; Wergeland, Stig; Gilhus, Nils Erik; Bjørk, Marte-Helene (Journal article; Peer reviewed, 2022)
      Objective To study whether exposure to childhood emotional, sexual or physical abuse is associated with subsequent multiple sclerosis (MS) development. Methods A nationwide, prospective cohort study based on participants ...
    • 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 ...
    • Low vitamin D, but not tobacco use or high BMI, is associated with long-term disability progression in multiple sclerosis 

      Wesnes, Kristin; Myhr, Kjell-Morten; Riise, Trond; Stokke, Silje Agnethe; Torkildsen, Øivind; Wergeland, Stig; Holmøy, Trygve; Midgard, Rune; Bru, Alla Nikolajevna S; Edland, Astrid; Eikeland, Randi; Gosal, Sonia; Harbo, Hanne Flinstad; Kleveland, Grethe; Sørenes, Yvonne; Øksendal, Nina; Bjørnevik, Kjetil Lauvland (Journal article; Peer reviewed, 2021)
      Background: Low vitamin D levels, tobacco use and high body mass index (BMI) have been linked to adverse disease outcomes in multiple sclerosis (MS), but their influence on long-term disability progression remains unclear. ...
    • 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 ...
    • Perinatal Depression and Anxiety in Women with Multiple Sclerosis: A Population-Based Cohort Study 

      Eid, Karine; Torkildsen, Øivind Fredvik Grytten; Aarseth, Jan Harald; Flemmen, Heidi Øyen; Holmøy, Trygve; Lorentzen, Åslaug Rudjord; Myhr, Kjell-Morten; Riise, Trond; Simonsen, Cecilia Smith; Torkildsen, Cecilie Fredvik; Wergeland, Stig; Willumsen, Johannes Sverre; Øksendal, Nina; Gilhus, Nils Erik; Bjørk, Marte-Helene (Journal article; Peer reviewed, 2021)
      Objective: To assess the occurrence of perinatal depression and anxiety in women before and after diagnosis of multiple sclerosis (MS). Methods: 114,629 pregnant women were included in the Norwegian Mother, Father and Child ...
    • Real-world discontinuation rate of teriflunomide and dimethyl fumarate in multiple sclerosis 

      Norborg, Hilde; Riise, Trond; Myhr, Kjell-Morten; Torkildsen, Nina Agnethe Grytten; Wergeland, Stig (Journal article; Peer reviewed, 2021)
      Background For patients with MS, medication switches increase the risk of disease reactivation. Objective Compare discontinuation rates due to treatment failure or side effects between teriflunomide and dimethyl ...
    • Timing of use of cod liver oil, a vitamin D source, and multiple sclerosis risk: The EnvIMS study. 

      Cortese, Marianna; Riise, Trond; Bjørnevik, Kjetil Lauvland; Holmøy, Trygve; Kampman, Margitta Theodora; Magalhaes, Sandra; Pugliatti, Maura; Wolfson, Christina; Myhr, Kjell-Morten (Peer reviewed; Journal article, 2015)
      Background: Low vitamin D levels have been associated with an increased risk of multiple sclerosis (MS), although it remains unknown whether this relationship varies by age. Objective: The objective of this paper is to ...