Blar i Faculty of Medicine på tittel

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    • Vitamin B12 Levels, Substance Use Patterns and Clinical Characteristics among People with Severe Substance Use Disorders: A Cohort Study from Western Norway 

      Madebo, Tesfaye; Mitra, Bemanian; Vold, Jørn Henrik; Chowdhury, Ranadip; Aas, Christer Frode; Druckrey-Fiskaaen, Karl Trygve; Johansson, Kjell Arne; Fadnes, Lars T. (Journal article; Peer reviewed, 2022)
      People with severe substance use disorder (SUD) have a higher burden of micronutrient deficiency compared with the general population. The aim of this study was to investigate vitamin B12 status and risk factors of deficiency ...

    • Vitamin B12 status in infancy and the effect of a vitamin B12 injection in infants with subclinical vitamin B12 deficiency: study protocol for a register-based randomised controlled trial 

      Bakken, Kjersti Sletten; Kvestad, Ingrid; Bjørkevoll, Sol Maja Graasvold; Solvik, Beate Stokke; Kaldenbach, Siri; McCann, Adrian; Holten-Andersen, Mads Nikolaj; Ersvær, Elisabeth; Konijnenberg, Carolien; Strand, Tor Arne (Journal article; Peer reviewed, 2023)
      Introduction: Vitamin B12 (cobalamin) is crucial for optimal child development and growth, yet deficiency is common worldwide. The aim of this study is twofold; (1) to describe vitamin B12 status and the status of other ...

    • Vitamin B6 catabolism and lung cancer risk: Results from the Lung Cancer Cohort Consortium (LC3) 

      Zuo, Hui; Ueland, Per Magne; Midttun, Øivind; Tell, Grethe S.; Fanidi, Anouar; Zheng, Wei; Shu, Xiao-Ou; Xiang, Yong-Bing; Wu, Jie; Prentice, Ross L.; Pettinger, Mary; Thomson, Cynthia A.; Giles, Graham G.; Hodge, Allison M.; Cai, Qiuyin; Blot, William J.; Johansson, Mikael B.; Hultdin, Johan; Grankvist, Kjell; Stevens, Victoria L.; McCullough, Marjorie L.; Weinstein, Stephanie J.; Albanes, Demetrius; Ziegler, Regina G.; Freedman, Neal David; Caporaso, Neil E.; Langhammer, Arnulf; Hveem, Kristian; Næss, Marit; Buring, Julie E.; Lee, I-Min; Gaziano, John Michael; Severi, Gianluca; Zhang, Xuehong; Stampfer, Meir Jonathan; Han, Jiali; Zeleniuch-Jacquotte, Anne; Marchand, Loïc Le; Yuan, Jian-Min; Wang, Renwei; Koh, Woon-Puay; Gao, Yutang; Ericson, Ulrika C.; Visvanathan, Kala; Jones, Michael R.; Relton, Caroline Laura; Brennan, Paul J.; Johansson, Mattias; Ulvik, Arve (Journal article; Peer reviewed, 2019-03)
      Background Increased vitamin B6 catabolism related to inflammation, as measured by the PAr index (the ratio of 4-pyridoxic acid over the sum of pyridoxal and pyridoxal-5'-phosphate), has been positively associated with ...

    • Vitamin D as a risk factor for patient survival after kidney transplantation: A prospective observational cohort study 

      Thorsen, Inga Strand; Bleskestad, Inger Hjørdis; Åsberg, Anders; Hartmann, Anders; Skadberg, Øyvind; Brede, Cato; Ueland, Thor; Pasch, Andreas; Reisæter, Anna Varberg; Gøransson, Lasse (Peer reviewed; Journal article, 2019)
      Background: Short‐term survival after kidney transplantation is excellent, but long‐term survival remains low and is equivalent to non‐end‐stage renal disease patients with many invasive malignancies. The aim of the study ...

    • Vitamin D Deficiency is Associated with Increased Use of Antimicrobials among Preschool Girls in Ethiopia 

      Bodin, Johanna Eva; Mihret, Adane; Holm-Hansen, Carol J C; Dembinski, Jennifer Lynn; Trieu, Mai Chi; Tessema, Bamlak; Tarekegne, Azeb; Yimer, Solomon Abebe; Cox, Rebecca Jane; Aseffa, Abraham; Haneberg, Bjørn; Mjaaland, Siri (Peer reviewed; Journal article, 2019-03-07)
      Preschool children in Addis Ababa, Ethiopia, are highly exposed to influenza viruses. Factors related to infections, nutrition, and environmental conditions that might explain the burden of influenza among these children ...

    • Vitamin D levels, brain volume, and genetic architecture in patients with psychosis 

      Berg, Akiah Ottesen; Jørgensen, Kjetil Nordbø; Nerhus, Mari; Athanasiu, Lavinia; Popejoy, Alice; Bettella, Francesco; Norbom, Linn Christin Bonaventure; Gurholt, Tiril Pedersen; Dahl, Sandra Rinne; Andreassen, Ole Andreas; Djurovic, Srdjan; Agartz, Ingrid; Melle, Ingrid (Peer reviewed; Journal article, 2018-08-24)
      Background: Lower vitamin D levels are found in people with schizophrenia and depressive disorders, and also associated with neuroimaging abnormalities such as reduced brain volume in both animals and humans. Reduced whole ...

    • Vitamin D predicts all-cause and cardiac mortality in females with suspected acute coronary syndrome: a comparison with brain natriuretic peptide and high-sensitivity C-reactive protein 

      Næsgaard, Patrycja; Fuente, Ricardo León de la; Nilsen, Stein Tore; Woie, Leik; Årsland, Torbjørn; Staines, Harry; Nilsen, Dennis W.T. (Peer reviewed; Journal article, 2013)
      Vitamin D may not only reflect disease but may also serve as a prognostic indicator. Our aim was to assess the gender-specific utility of vitamin D measured as 25-hydroxy-vitamin D [25(OH)D] to predict all-cause and cardiac ...

    • Vitamin D status and associations with substance use patterns among people with severe substance use disorders in Western Norway 

      Mitra, Bemanian; Chowdhury, Ranadip; Stokke, Krister; Aas, Christer Frode; Johansson, Kjell Arne; Vold, Jørn Henrik; Fadnes, Lars T. (Journal article; Peer reviewed, 2022)
      Chronic and harmful substance use is associated with a cluster of harms to health, including micronutrient deficiencies. Maintaining adequate levels of vitamin D is important for musculoskeletal and other aspects of health. ...

    • Vitamin D status and cardiovascular disease. Observational studies in patients who underwent coronary angiography 

      Degerud, Eirik Magnus Meek (Doctoral thesis, 2016-01-19)
      Background: Vitamin D is required to maintain a healthy cardiovascular system, but it is unknown whether variation in vitamin D status in the general population is physiologically relevant to development of cardiovascular ...

    • Vitamin D status and child health, growth, and neurodevelopment 

      Chowdhury, Ranadip (Doctoral thesis, 2020-08-12)
      Background: Vitamin D deficiency is one of the most commonly under diagnosed micronutrient deficiencies in the world. Both animal and human studies suggest that vitamin D plays an important role in innate and adaptive ...

    • Vitamin D Status and Its Determinants in a Paediatric Population in Norway 

      Holten-Andersen, Mads Nikolaj; Haugen, Johanne; Oma, Ingvild; Strand, Tor A (Journal article; Peer reviewed, 2020)
      Recommendations for sufficient vitamin D intake in children were recently revised in Norway. However, optimal levels of vitamin D are still debated and knowledge on supplementation and vitamin D levels in healthy children ...

    • Vitamin D supplementation and its influence on musclestrength and mobility in community-dwelling olderpersons: a systematic review and meta-analysis 

      Rosendahl-Riise, Hanne; Spielau, U.; Ranhoff, Anette Hylen; Gudbrandsen, Oddrun Anita; Dierkes, Jutta (Peer reviewed; Journal article, 2017-02)
      Background: It has been suggested that vitamin D status or supplementation is important for maintaining or improving muscle strength and mobility in older adults. The study results, however, do not provide consistent ...

    • Vitamin D Uptake in Patients Treated with a High-Dosed Purified Omega-3 Compound in a Randomized Clinical Trial Following an Acute Myocardial Infarction 

      Næsgaard, Patrycja; Grundt, Heidi; Nordøy, Arne; Staines, Harry; Nilsen, Dennis W.T. (Peer reviewed; Journal article, 2017-07-24)
      Background: Fish is the natural dietary source of vitamin D. Reports on the influence of purified omega-3 fatty acids on its uptake are scarce. Objectives: We investigated the impact of a purified high-dose omega-3 compound ...

    • Vitamin D, Calcium and Energy intake and the association with bone mineral density among elite level para cyclists and able bodied cyclists 

      Grønnslett, Sunniva Kristine Jaspers (Master thesis, 2023-01-03)
      Background: Dietary intakes and supplement use among Paralympic Athletes are generally unknown, and expert advice is scarce. Low bone mineral density (BMD) is an issue many para athletes (PA) meet. Elite cyclists are ...

    • Vitamin D, oral health, and disease characteristics in juvenile idiopathic arthritis: a multicenter cross-sectional study 

      Cetrelli, Lena Elisabet; Bletsa, Athanasia; Lundestad, Anette; Gil, Elisabeth Grut; Fischer, Johannes Maria; Halbig, Josefine Mareile; Frid, Paula Hanna Therese; Angenete, Oskar W; Lien, Ingrid Lillevoll; Rosén, Annika; Tylleskär, Karin; Luukko, Keijo; Nordal, Ellen Berit; Åstrøm, Anne-Kristine N; Skeie, Marit Slåttelid; Feuerherm, Astrid Jullumstrø; Sen, Abhijit; Rygg, Marite (Journal article; Peer reviewed, 2022)
      Background Vitamin D deficiency has been associated with autoimmune diseases and oral health. Knowledge about the association between vitamin D status and oral conditions in JIA is limited. We aimed to investigate vitamin ...

    • Vitamin D, vitamin D binding protein, and longitudinal outcomes in COPD 

      Persson, Louise Jeanette Pauline; Aanerud, Marianne; Hiemstra, Pieter Sicco; Michelsen, Annika; Ueland, Thor; Hardie, Jon Andrew; Aukrust, Pål; Bakke, Per S.; Eagan, Tomas Mikal (Peer reviewed; Journal article, 2015-03-24)
      Background: Associations between Vitamin D3 [25(OH)D], vitamin D binding protein (VDBP) and chronic obstructive pulmonary disease (COPD) are previously reported. We aimed to further investigate these associations on ...

    • Vitamin D-status hos norske ettåringer og deres mødre og betydningen av sjømatinntak og kosttilskudd 

      Breistein, Liv Stray (Master thesis, 2013-09-13)
      Background: Vitamin D is necessary for normal bone development, cell differentiation and immune response. Existing data shows that a relatively large proportion of the population has insufficient vitamin D status. When ...

    • Vitamin D3 supplementation does not enhance the effects of resistance training in older adults 

      Mølmen, Knut Sindre; Hammarström, Jens Konrad Daniel; Pedersen, Karianne; Lie, Anne Cecilie Lian; Steile, Ragnvald B.; Nygård, Håvard; Khan, Yusuf; Hamarsland, Håvard; Koll, Lise; Hanestadhaugen, Marita; Eriksen, Atle Lie; Grindaker, Eirik; Whist, Jon Elling; Buck, Daniel; Ahmad, Rafi; Strand, Tor Arne; Rønnestad, Bent R.; Ellefsen, Stian (Journal article; Peer reviewed, 2021)
      Background: Lifestyle therapy with resistance training is a potent measure to counteract age-related loss in muscle strength and mass. Unfortunately, many individuals fail to respond in the expected manner. This phenomenon ...

    • Vitamin status among breastfed infants in Bhaktapur, Nepal 

      Ulak, Manjeswori; Chandyo, Ram Krishna; Thorne-Lyman, Andrew L.; Henjum, Sigrun; Ueland, Per Magne; Midttun, Øivind; Shrestha, Prakash S.; Fawzi, Wafaie W.; Graybill, Lauren; Strand, Tor A (Peer reviewed; Journal article, 2016-03-08)
      Vitamin deficiencies are known to be common among infants residing in low- and middle-income countries but relatively few studies have assessed several biochemical parameters simultaneously. The objective of the study was ...

    • Vitamin-D status and neurodevelopment and growth in young north Indian children: a secondary data analysis 

      Chowdhury, Ranadip; Taneja, Sunita; Bhandari, Nita; Kvestad, Ingrid; Strand, Tor A; Bhan, Maharaj Kishan (Peer reviewed; Journal article, 2017-09-18)
      Background: Vitamin-D deficiency has been linked with impaired development in animal studies; however, the evidence from human studies is scanty. Evidence as to whether vitamin-D deficiency during early childhood affects ...