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    • Vitamin D deficiency is common in psychogeriatric patients, independent of diagnosis 

      Grønli, Ole Kristian; Kvamme, Jan-Magnus; Jorde, Rolf; Wynn, Rolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-05-08)
      Background:Previous studies have found an association between psychiatric disorders and vitamin D deficiency, but most studies have focused on depression. This study aimed to establish the prevalence of vitamin D deficiency in elderly patients with a wider range of psychiatric diagnoses. Method: The study included elderly patients (>64 years) referred to a psychiatric hospital in Northern Norway ...

    • Vitamin D in relation to incident sarcopenia and changes in muscle parameters among older adults: The KORA-Age Study 

      Conzade, Romy; Grill, Eva; Bischoff-Ferrari, Heike A.; Ferrari, Uta; Horsch, Alexander; Peters, Annette; Thorand, Barbara (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-05-08)
      Summary We report low baseline 25-hydroxyvitamin D (25OHD) levels being associated with unfavorable changes in muscle mass and physical performance over three years, but not with incident sarcopenia. Future prospective studies are needed to assess causality and to address the issue of competing risks such as mortality in older cohorts. Introduction Effects of low serum 25-hydroxyvitamin D (25OHD) ...

    • Vitamin D security in Northern Norway in relation to marine food traditions 

      Brustad, Magritt (Doctoral thesis; Doktorgradsavhandling, 2004)

    • Vitamin D Status During Adolescence and the Impact of Lifestyle Changes: 2 Years’ Follow-up From the Fit Futures Study 

      Öberg, Eva Gunnel Johanna; Jorde, Rolf; Almås, Bjørg; Nielsen, Christopher Sivert; Gerds, Thomas Alexander; Cashman, Kevin D.; Grimnes, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-13)
      Context: Longitudinal data regarding vitamin D status in adolescence is scarce. This study presents population-based data from an Arctic adolescent population (n = 589) at 16 and 18 years. Objective: The aims of this study were to investigate changes in vitamin D status during 2 years in adolescence, and whether lifestyle changes were associated with serum 25-hydroxyvitamin D (s-25(OH)D) at follow-up. ...

    • Vitamin D status in a multi-ethnic population of northern Norway: The SAMINOR 2 Clinical Survey 

      Petrenya, Natalia; Lamberg-Allardt, Christel; Melhus, Marita; Broderstad, Ann Ragnhild; Brustad, Magritt (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-15)
      <i>Objective</i> - To investigate serum 25-hydroxyvitamin D (S-25(OH)D) concentration in a multi-ethnic population of northern Norway and determine predictors of S-25(OH)D, including Sami ethnicity.<p> <p><i>Design</i> - Cross-sectional data from the second survey of the Population-based Study on Health and Living Conditions in Regions with Sami and Norwegian Populations (the SAMINOR 2 Clinical ...

    • Vitamin D supplementation does not improve CVD risk factors in vitamin D-insufficient subjects 

      Kubiak, Julia Magdalena; Thorsby, Per Medbøe; Kamycheva, Elena; Jorde, Rolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06)
      <p><i>Objective</i>: Low serum 25(OH)D levels are associated with cardiovascular disease (CVD) and some of its risk factors. However, in interventional studies, the effects of vitamin D supplementation have been uncertain, possibly due to inclusion of vitamin D-sufficient subjects. Our aim was therefore to examine effects of vitamin D supplementation on CVD risk factors in vitamin D-insufficient ...

    • Vitamin D supplementation for prevention of type 2 diabetes mellitus: To D or Not to D? 

      Pittas, Anastassios G.; Jorde, Rolf; Kawahara, Tetsuya; Dawson-Hughes, Bess (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-26)
      <i>Context</i> - Over the last decade, vitamin D has emerged as a risk determinant for type 2 diabetes and vitamin D supplementation has been hypothesized as a potential intervention to lower diabetes risk. Recently, several trials have reported on the effect of vitamin D supplementation on diabetes prevention in people with prediabetes.<p> <p><i>Evidence Acquisition</i> - A comprehensive literature ...

    • 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. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-07-24)
      Background: <br> Fish is the natural dietary source of vitamin D. Reports on the influence of purified omega-3 fatty acids on its uptake are scarce. <br> Objectives: <br> We investigated the impact of a purified high-dose omega-3 compound compared to corn oil on 25-hydroxyvitamin D [25(OH)D] levels following an acute myocardial infarction. <br> Methods: <br> 228 patients were randomized 1:1 to receive ...

    • Vitamin D – a scoping review for Nordic nutrition recommendations 2023 

      Brustad, Magritt; Meyer, Haakon Eduard (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-13)
      Vitamin D is an essential nutrient. Its role in calcium and phosphorous metabolism, and in the development and maintenance of a healthy skeleton is well documented. In addition, there is some evidence for vitamin D decreasing total mortality and cancer mortality modestly, but not cancer incidence. Vitamin D is unique, as both diet and sun induced production in skin are sources to this vitamin. ...

    • Vitamin D, Depression and Headache - Results from the Tromsø Study and an intervention study with vitamin D 

      Kjærgaard, Marie (Doctoral thesis; Doktorgradsavhandling, 2013-04-19)
      Vitamin D is well known for the effect in bone metabolism and calcium regulation. In the past decade increasing evidence that vitamin D might be important in other areas has emerged. Especially glucose metabolism, cardiovascular disease and infectious diseases have been investigated. In addition, several population studies have shown that an association between vitamin D and depression might be of ...

    • 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; Tidsskriftartikkel; Peer reviewed, 2022-08-08)
      Background: Vitamin D defciency 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 D status in a cohort of Norwegian children and adolescents with JIA and possible associations between serum vitamin D levels, clinical indicators of oral health, and JIA disease ...

    • Vitamin D-related genes, blood vitamin D levels and colorectal cancer risk in Western European populations 

      Fedirko, Veronika; Mandle, Hannah B.; Zhu, Wanzhe; Hughes, David J.; Siddiq, Afshan; Ferrari, Pietro; Romieu, Isabelle; Riboli, Elio; Bueno-de-Mesquita, Hendrik Bastiaan; van Duijnhoven, Fränzel J.B.; Siersema, Peter D.; Tjønneland, Anne; Olsen, Anja; Perduca, Vittorio; Carbonnel, Franck; Boutron-Ruault, Marie-Christine; Kühn, Tilman; Johnson, Theron; Krasimira, Aleksandrova; Trichopoulou, Antonia; Makrythanasis, Periklis; Thanos, Dimitris; Panico, Salvatore; Krogh, Vittorio; Sacerdote, Carlotta; Skeie, Guri; Weiderpass, Elisabete; Colorado-Yohar, Sandra; Sala, Núria; Barricarte, Aurelio; Sánchez, María-José; Quirós, Ramón; Amiano, Pilar; Gylling, Björn; Harlid, Sophia; Perez-Cornago, Aurora; Heath, Alicia K.; Tsilidis, Konstantinos K.; Aune, Dagfinn; Freisling, Heinz; Murphy, Neil; Gunter, Marc J.; Jenab, Mazda (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-20)
      Higher circulating 25-hydroxyvitamin D levels (25(OH)D) have been found to be associated with lower risk for colorectal cancer (CRC) in prospective studies. Whether this association is modified by genetic variation in genes related to vitamin D metabolism and action has not been well studied in humans. We investigated 1307 functional and tagging single-nucleotide polymorphisms (SNPs; individually, ...

    • Vitamin D. Er det en sammenheng mellom nivået av vitamin D og risiko for utvikling av kronisk sykdom? 

      Bentzen, Sara; Mørch, Hanne (Master thesis; Mastergradsoppgave, 2009-09-15)
      Vi har skrevet en oppgave hvor vi har gjort en litteraturstudie på vitamin D i forhold til enkelte kroniske tilstander, samt et eget forskningsarbeid som vi har knyttet opp mot litteraturdelen av oppgaven. Vi gikk ut fra en problemstilling hvor vi ønsket å se på om det var noen sammenheng mellom nivået av vitamin D og risiko for utvikling av utvalgte kronisk sykdommer. I litteraturstudien har vi ...

    • 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; Tidsskriftartikkel; Peer reviewed, 2021-03-31)
      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 is particularly common among older adults and those with chronic diseases (e.g. chronic obstructive pulmonary disease, COPD) and may involve endocrine variables such as vitamin ...

    • Vitamin D: Relations with Sleep and Bone Mineral Density. Insights from the Tromsø Study and randomized controlled trials 

      Larsen, Anette Uhlving (Doctoral thesis; Doktorgradsavhandling, 2022-06-10)
      In this thesis, the relationship between vitamin D and health-related outcomes has been investigated. More than 21,000 individuals participated in the Tromsø Study 2015-16. The participants donated blood samples and filled in questionnaires regarding their health status, including questions about their sleep health. Using these data, the association between vitamin D and sleep duration, daytime ...

    • Vitamin K, MGP og kalsifisering av kar hos pasienter i hemodialyse 

      Moy, Cay Martin (Master thesis; Mastergradsoppgave, 2021-08-23)
      Innledning: Oppgavens problemstilling var å undersøke hva utvalgt litteratur kan tilføre av kunnskap om vitamin K og dets korrelasjon med matrix GLA-protein (MGP) og kalsifisering av kar hos pasienter i hemodialyse. Formålet med oppgaven var å gå systematisk gjennom utvalgt litteratur, for å utforske korrelasjon med MGP og kalsifisering av kar. Faktorer som ble belyst er inntak, opptak og tilskudd ...

    • Vitamin K2 in Animal Health: An Overview 

      O'Neil, Jayde; Scarrott, Bethany; Svalheim, Ragnhild Aven; Elliot, Jonathan; Hodges, Stephen J. (Chapter; Bokkapittel, 2017-03-22)
      The role of vitamin K in animal health has not received much attention. Vitamin K studies have, for the most part, addressed the use of animals in the investigation of vitamin K physiology and pathophysiology, often using the rodent as a model system. However, vitamin K performs the same role in animals as it does in man and there are areas, such as animal nutrition, where a better understanding of ...

    • Viten skapt gjennom fleksibel læring 

      Jentoft, Rita (Chapter; Bokkapittel, 2020)
      <p>Basert på en evalueringsstudie med søkelys på helsefagstudenters læring av vitenskapsteori, etikk og forskningsmetode gjennom blandet nettbasert og klasseromsundervisning utforskes: <p>Hvilke erfaringer med fleksibel læring fremmer og hemmer helsefagstudenters læringsprosess? <p>Hvilket læringsutbytte i vitenskapsteori og forskningsmetode kan studentene nyttiggjøre seg gjennom senere arbeid med ...

    • Vitenskap og moralfilosofi. Et forsvar av Joshua Greenes kritikk av deontologisk etikk. 

      Lorentsen, Torjus (Master thesis; Mastergradsoppgave, 2018-05-15)
      Joshua Greene argumenterer for at deontologisk etikk er uegnet som normativ teori fordi den har sitt opphav i nevrologiske- og psykologiske prosesser som er sensitive for faktorer som ikke er moralsk relevante. Jeg argumenterer for at normativ etikk, representert ved debatten mellom deontologi og konsekvensialisme, er en disiplin preget av stillstand, og at Greenes prosjekt har potensial til å bøte ...

    • Vitenskap og verdier i moderne medisin: Idealer og realiteter 

      Lian, Olaug S (Chapter; Bokkapittel, 2012)
      Dette essayet inneholder en kritisk drøfting av for estillingen om medisinsk praksis som en kunnskapsbasert og verdinøytral virksomhet. Perspektivet er sosiologisk og historisk, og til dels også kjønnet. Utgangspunktet for drøftingen er to case , ett fra somatikken og ett fra psykiatrien. Fra somatikken; de såkalte medically unexplained physical symptoms (MUPS); fra psykiatrien; karaktertrekkdiagnosene. ...