Blar i forfatter "Mathiesen, Ellisiv B."

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    • Clustering of cardiovascular risk factors and carotid intima-media thickness: The USE-IMT study 

      Wang, Xin; Dalmeijer, Geertje W.; den Ruijter, Hester M.; Anderson, Todd J.; Britton, Annie R.; Dekker, Jacqueline; Engström, Gunnar; Evans, Greg W.; De Graaf, Jacqueline; Grobbee, Diederick E.; Hedblad, Bo; Holewijn, Suzanne; Ikeda, Ai; Kauhanen, Jussi; Kitagawa, Kazuo; Kitamura, Akihiko; Kurl, Sudhir; Lonn, Eva M.; Lorenz, Matthias W.; Mathiesen, Ellisiv B.; Nijpels, Giel; Okazaki, Shuhei; Polak, Joseph F.; Price, Jacqueline F.; Rembold, Christopher M.; Rosvall, Maria; Rundek, Tatjana; Salonen, Jukka T.; Sitzer, Matthias; Stehouwer, Coen D.A.; Tuomainen, Tomi-Pekka; Peters, Sanne A.E.; Bots, Michiel L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-21)
      Background:<br>The relation of a single risk factor with atherosclerosis is established. Clinically we know of risk factor clustering within individuals. Yet, studies into the magnitude of the relation of risk factor clusters with atherosclerosis are limited. Here, we assessed that relation.<br>Methods:<br>Individual participant data from 14 cohorts, involving 59,025 individuals were used in this ...

    • Cohort profile: The Tromsø Study 

      Jacobsen, Bjarne Koster; Eggen, Anne Elise; Mathiesen, Ellisiv B.; Wilsgaard, Tom; Njølstad, Inger (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      The Tromsø Study was initiated in 1974 in an attempt to help combat the high mortality of cardiovascular diseases in Norway, that was particularly pronounced among middle-aged men. In the mid-1970s, Norwegian men had a 20% risk of dying of myocardial infarction (MI) before the age of 75 years. The situation in Northern Norway was even worse.1 The primary aim of the Tromsø Study was to determine ...

    • Data from national health registers as endpoints for the Tromsø Study: Correctness and completeness of stroke diagnoses 

      Varmdal, Torunn; Løchen, Maja-Lisa; Wilsgaard, Tom; Njølstad, Inger; Nyrnes, Audhild; Grimsgaard, Sameline; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-14)
      Aim: To assess whether stroke diagnoses in national health registers are sufficiently correct and complete to replace manual collection of endpoint data for the Tromsø Study, a population-based epidemiological study.<p> <p>Method: Using the Tromsø Study Cardiovascular Disease Register for 2013–2014 as the gold standard, we calculated correctness (defined as positive predictive value, PPV) and ...

    • The DBP Phenotype Gc-1f/Gc-1f is associated with reduced risk of cancer. The Tromsø Study 

      Jorde, Rolf; Schirmer, Henrik; Wilsgaard, Tom; Mathiesen, Ellisiv B.; Løchen, Maja-Lisa; Joakimsen, Ragnar Martin; Grimnes, Guri (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-05-18)
      Background and Objective In addition to its role as a transport protein, the vitamin D binding protein (DBP) may also affect lipid metabolism, inflammation and carcinogenesis. There are three common variants of the DBP, Gc1s (1s), Gc1f (1f), Gc2 (2) that result in six common phenotypes (1s/1s, 1s/ 1f, 1s/2, 1f/1f, 1f/2, and 2/2). These phenotypes can be identified by genotyping for the two single ...

    • Does insomnia modify the association between C-reactive protein and migraine? The Tromsø Study 2015-2016. 

      Hagen, Knut; Hopstock, Laila Arnesdatter; Eggen, Anne Elise; Mathiesen, Ellisiv B.; Nilsen, Kristian Bernhard (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-12)
      <p><i>Background - </i>The relationship between high sensitivity C-reactive protein and migraine is unclear. The aim of this cross-sectional population-based study was to investigate the association between high sensitivity C-reactive protein and types of headache, and to evaluate the impact of insomnia on this association. <p><i>Methods - </i>A total of 20,486 (63%) out of 32,591 invited, aged ≥40 ...

    • Effect of adiposity on differences in carotid plaque burden in studies conducted in Norway and Russia: a cross-sectional analysis of two populations at very different risk of cardiovascular mortality 

      Imahori, Yume; Frost, Chris; Mathiesen, Ellisiv B.; Ryabikov, Andrey; Kudryavtsev, Alexander V; Malyutina, Sofia; Kornev, Michael; Hughes, Alun D; Hopstock, Laila Arnesdatter; Leon, David Adrew (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-06)
      <i>Objectives</i> - Large differences exist in the burden of cardiovascular disease (CVD) between Russia and Western European countries including Norway. Obesity prevalence may contribute to the differences. We investigated whether difference in the level of adiposity, assessed using body mass index and waist-to-hip ratio(WHR), could explain intercountry differences in the burden of carotid plaque, ...

    • Effect of genetically low 25-hydroxyvitamin D on mortality risk: Mendelian randomization analysis in 3 large European cohorts 

      Aspelund, Thor; Grübler, Martin R.; Smith, Albert V.; Gudmundsson, Elias F.; Keppel, Martin; Cotch, Mary Frances; Harris, Tamara B.; Jorde, Rolf; Grimnes, Guri; Joakimsen, Ragnar Martin; Schirmer, Henrik; Wilsgaard, Tom; Mathiesen, Ellisiv B.; Njølstad, Inger; Løchen, Maja-Lisa; März, Winfried; Kleber, Marcus E.; Tomaschitz, Andreas; Grove-Laugesen, Diana; Rejnmark, Lars; Swart, Karin M.A.; Brouwer, Ingeborg A.; Lips, Paul; van Schoor, Natasja M.; Sempos, Christopher T.; Durazo-Arvizu, Ramón A.; Škrabáková, Zuzana; Dowling, Kirsten G.; Cashman, Kevin D.; Kiely, Mairead; Pilz, Stefan; Gudnason, Vilmundur; Eiríksdóttir, Gudny (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-02)
      The aim of this study was to determine if increased mortality associated with low levels of serum 25-hydroxyvitamin D (25(OH)D) reflects a causal relationship by using a Mendelian randomisation (MR) approach with genetic variants in the vitamin D synthesis pathway. Individual participant data from three European cohorts were harmonized with standardization of 25(OH)D according to the Vitamin D ...

    • Estimated and Measured GFR Associate Differently with Retinal Vasculopathy in the General Population 

      Eriksen, Bjørn Odvar; Løchen, Maja-Lisa; Arntzen, Kjell Arne; Bertelsen, Geir; Eilertsen, Britt-Ann; Hanno, Therese von; Herder, Marit; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Melsom, Toralf; Njølstad, Inger; Solbu, Marit Dahl; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11)
      Background/Aims: Estimated GFR (eGFR) is used extensively in epidemiological research. Validations of eGFR have demonstrated acceptable performance, but the dependence of creatinine and cystatin C on non-GFR factors could confound associations with disease. Few studies have investigated this issue in direct comparison with measured GFR (mGFR). We compared the associations between eGFR and mGFR ...

    • Evaluation of Serum 25-Hydroxyvitamin D as a Predictor of Carotid Intima-Media Thickness and Carotid Total Plaque Area in Nonsmokers: The Tromso Study 

      Kamycheva, Elena; Johnsen, Stein Harald; Wilsgaard, Tom; Jorde, Rolf; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Objective. Altered calcium homeostasis has been linked to increased intima-media thickness (IMT) and plaques. We aimed to investigate whether serum 25-hydroxyvitamin D (25(OH)D) and serum calcium are associated with IMT and plaques in nonsmoking population. Methods.Ultrasound of the right carotid arterywith themeasurements of IMT and plaqueswas performed in 4194 nonsmoking subjects with available ...

    • Family History of Myocardial Infarction and Cause-Specific Risk of Myocardial Infarction and Venous Thromboembolism - The Tromsø Study 

      Lind, Caroline; Enga, Kristin Fjeldstad; Mathiesen, Ellisiv B.; Njølstad, Inger; Brækkan, Sigrid Kufaas; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • Females display lower risk of myocardial infarction from higher estimated cardiorespiratory fitness than males. The Tromsø Study 1994-2014 

      Sagelv, Edvard Hamnvik; Casolo, Andrea; Eggen, Anne Elise; Heitmann, Kim Arne; Johansen, Kristoffer Robin; Løchen, Maja-Lisa; Mathiesen, Ellisiv B.; Morseth, Bente; Njølstad, Inger; Osborne, John Owen; Hagerupsen, Karianne; Pedersen, Sigurd; Wilsgaard, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-06)
      Objective - To examine the dose-response association between estimated cardiorespiratory fitness (eCRF) and risk of myocardial infarction (MI).<p> <p>Patients and Methods - Adults who attended Tromsø Study surveys 4-6 (Janurary 1,1994-December 20, 2008) with no previous cardiovascular disease were followed up through December 31, 2014 for incident MI. Associations were examined using restricted ...

    • Fish consumption, fish oil supplements and risk of atherosclerosis in the Tromsø study 

      Johnsen, Stein Harald; Jacobsen, Bjarne K.; Brækkan, Sigrid Kufaas; Hansen, John-Bjarne; Mathiesen, Ellisiv B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-25)
      Background: <br>Whether long-chain n–3 PUFAs of marine origin have an anti-atherogenic effect in the general population has hardly been studied. In this population-based study, we hypothesized that fatty fish and fish oil intake protect against development of novel atherosclerotic plaques and is associated with reduced plaque size.<br> Methods: <br>We obtained questionnaire-based information ...

    • Genetic variations in the Vitamin D receptor predict type 2 diabetes and myocardial infarction in a community-based population: The tromsø study 

      Zostautiene, Leva; Jorde, Rolf; Schirmer, Henrik; Mathiesen, Ellisiv B.; Njølstad, Inger; Løchen, Maja-Lisa; Wilsgaard, Tom; Joakimsen, Ragnar Martin; Kamycheva, Elena (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-23)
      Background Though the associations between low serum 25-hydroxyvitamin D (25(OH)D) levels and health outcomes such as type 2 diabetes (T2D), myocardial infarction (MI), cancer, and mortality are well-studied, the effect of supplementation with vitamin D is uncertain. This may be related to genetic differences. Thus, rs7968585, a single nucleotide polymorphism (SNP) of the vitamin D receptor ...

    • Global Effect of Modifiable Risk Factors on Cardiovascular Disease and Mortality. 

      Magnussen, Christina; Ojeda, Francisco M.; Leong, Darryl P.; Alegre-Diaz, Jesus; Amouyel, Philippe; Aviles-Santa, Larissa; De Bacquer, Dirk; Ballantyne, Christie M.; Bernabé-Ortiz, Antonio; Bobak, Martin; Brenner, Hermann; Carrillo-Larco, Rodrigo M.; De Lemos, James; Dobson, Annette; Dörr, Marcus; Donfrancesco, Chiara; Drygas, Wojciech; Dullaart, Robin P.; Engström, Gunnar; Ferrario, Marco M.; Ferrières, Jean; De Gaetano, Giovanni; Goldbourt, Uri; Gonzalez, Clicerio; Grassi, Guido; Hodge, Allison M.; Hveem, Kristian; Iacoviello, Licia; Ikram, M. Kamran; Irazola, Vilma; Jobe, Modou; Jousilahti, Pekka; Kaleebu, Pontiano; Kavousi, Maryam; Kee, Frank; Khalili, Davood; Koenig, Wolfgang; Kontsevaya, Anna; Kuulasmaa, Kari; Lackner, Karl J.; Leistner, David M.; Lind, Lars; Linneberg, Allan; Lorenz, Thiess; Lyngbakken, Magnus Nakrem; Malekzadeh, Reza; Malyutina, Sofia; Mathiesen, Ellisiv B.; Melander, Olle; Metspalu, Andres; Miranda, J. Jaime; Moitry, Marie; Mugisha, Joseph; Nalini, Mahdi; Nambi, Vijay; Ninomiya, Toshiharu; Oppermann, Karen; D'Orsi, Eleonora; Pająk, Andrzej; Palmieri, Luigi; Panagiotakos, Demosthenes; Perianayagam, Arokiasamy; Peters, Annette; Poustchi, Hossein; Prentice, Andrew M.; Prescott, Eva; Risérus, Ulf; Salomaa, Veikko; Sans, Susana; Sakata, Satoko; Schöttker, Ben; Schutte, Aletta E.; Sepanlou, Sadaf G.; Sharma, Sanjib Kumar; Shaw, Jonathan E.; Simons, Leon A.; Söderberg, Stefan; Tamosiunas, Abdonas; Thorand, Barbara; Tunstall-Pedoe, Hugh; Twerenbold, Raphael; Vanuzzo, Diego; Veronesi, Giovanni; Waibel, Julia; Wannamethee, S. Goya; Watanabe, Masafumi; Wild, Philipp S.; Yao, Yao; Zeng, Yi; Ziegler, Andreas; Blankenberg, Stefan (Journal article; Tidsskriftartikkel; Peer reviewed, 2023)
      BACKGROUND - Five modifiable risk factors are associated with cardiovascular disease and death from any cause. Studies using individual-level data to evaluate the regional and sex-specific prevalence of the risk factors and their effect on these outcomes are lacking.<p> <p>METHODS - We pooled and harmonized individual-level data from 112 cohort studies conducted in 34 countries and 8 geographic ...

    • HbA1c levels in non-diabetic older adults - No J-shaped associations with primary cardiovascular events, cardiovascular and all-cause mortality after adjustment for confoundersin a meta-analysis of individual participant data from six cohort studies 

      Schöttker, Ben; Rathmann, Wolfgang; Herder, Christian; Thorand, Barbara; Wilsgaard, Tom; Njølstad, Inger; Siganos, Galatios; Mathiesen, Ellisiv B.; Saum, Kai-Uwe; Peasey, Anne; Feskens, Edith J.M.; Boffetta, Paolo; Trichopoulou, Antonia; Kuulasmaa, Kari; Kee, Frank; Brenner, Hermann (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-02-11)
      Background:<br>To determine the shape of the associations of HbA1c with mortality and cardiovascular outcomes in non-diabetic individuals and explore potential explanations.<br> Methods:<br> The associations of HbA1c with all-cause mortality, cardiovascular mortality and primary cardiovascular events (myocardial infarction or stroke) were assessed in non-diabetic subjects ≥50 years from six ...

    • Hematocrit and risk of venous thromboembolism in a general population. The Tromso study 

      Brækkan, Sigrid Kufaas; Mathiesen, Ellisiv B.; Njølstad, Inger; Wilsgaard, Tom; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)

    • Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight 

      Iurilli, Maria Laura Caminia; Zhou, Bin; Bennett, James E.; Carrillo-Larco, Rodrigo M.; Sophiea, Marisa K.; Rodriguez-Martinez, Andrea; Bixby, Honor; Solomon, Bethlehem D.; Taddei, Cristina; Danaei, Goodarz; Di Cesare, Mariachiara; Stevens, Gretchen A.; Riley, Leanne M.; Savin, Stefan; Cowan, Melanie J.; Bovet, Pascal; Damasceno, Albertino Antonio Moura; Chirita-Emandi, Adela; Hayes, Alison J; Ikeda, Nayu; Jackson, Rod T.; Khang, Young-Ho; Laxmaiah, Avula; Liu, Jing; Miranda, J. Jaime; Saidi, Olfa; Sebert, Sylvain; Sorić, Maroje; Starc, Gregor; Gregg, Edward W.; Abarca-Gómez, Leandra; Abdeen, Ziad A.; Abdrakhmanova, Shynar; Ghaffar, Suhaila Abdul; Rahim, Hanan Abdul; Abu-Rmeileh, Niveen M.; Garba, Jamila Abubakar; Acosta-Cazares, Benjamin; Adams, Robert J.; Aekplakorn, Wichai; Afsana, Kaosar; Afzal, Shoaib; Agdeppa, Imelda A.; Aghazadeh-Attari, Javad; Aguilar-Salinas, Carlos A.; Agyemang, Charles; Ahmad, Mohamad Hasnan; Ahmad, Noor Ani; Ahmadi, Ali; Ahmadi, Naser; Hassan, Soheir; Andersen, Lars Bo; Anderssen, Sigmund Alfred; Ariansen, Inger Kristine Holtermann; Bergh, Ingunn Holden; Bjertness, Espen; Bjertness, Marius Bergsmark; Ekelund, Ulf; Graff-Iversen, Sidsel; Grøholt, Else Karin; Haugsgjerd, Teresa Risan; Janszky, Imre; Kolle, Elin; Krokstad, Steinar; Madar, Ahmed Ali; Mathiesen, Ellisiv B.; Meisfjord, Jørgen Rajan; Meyer, Haakon Eduard; Sen, Abhijit; Skodje, Gry Irene; Sørgjerd, Elin Pettersen; Sparboe-Nilsen, Bente; Steene-Johannessen, Jostein; Tarp, Jakob; Tell, Grethe S.; Torheim, Liv Elin; Wilsgaard, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-09)
      From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in different regions using data from 2896 population-based ...

    • High-sensitivity C-reactive protein is not a risk factor for venous thromboembolism: the Tromso study 

      Hald, Erin Mathiesen; Brækkan, Sigrid Kufaas; Mathiesen, Ellisiv B.; Njølstad, Inger; Wilsgaard, Tom; Brox, Jan; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      High-sensitivity C-reactive protein is associated with risk of arterial cardiovascular disease but conflicting results have been reported on its role in venous thromboembolic disease. The objective of our study was to investigate the association between high-sensitivity C-reactive protein levels and risk of future venous thromboembolism in a prospective cohort recruited from a general population. ...

    • Impact of Chronic Inflammation, Assessed by hs-CRP, on the Association between Red Cell Distribution Width and Arterial Cardiovascular Disease: The Tromsø Study 

      Lappegård, Jostein; Ellingsen, Trygve; Hindberg, Kristian; Mathiesen, Ellisiv B.; Njølstad, Inger; Wilsgaard, Tom; Løchen, Maja-Lisa; Brækkan, Sigrid Kufaas; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-10)
      Red cell distribution width (RDW), a measure of variability in size of circulating erythrocytes, is associated with arterial cardiovascular disease (CVD), but the underlying mechanism remains unclear. We aimed to investigate the impact of chronic inflammation as measured by high sensitivity CRP (hs-CRP) on this relationship, and explore whether RDW could be a mediator in the causal pathway between ...

    • Impact of incident myocardial infarction on the risk of venous thromboembolism: the Tromsø Study 

      Balteskard Rinde, Ludvig; Lind, Caroline; Småbrekke, Birgit; Njølstad, Inger; Mathiesen, Ellisiv B.; Wilsgaard, Tom; Løchen, Maja-Lisa; Mathiesen Hald, Erin; Vik, Anders; Brækkan, Sigrid Kufaas; Hansen, John-Bjarne; Rinde, Ludvig Balteskard (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-10)
      Background: Recent studies have demonstrated an association between venous thromboembolism (VTE) and arterial thrombotic diseases. <p> Objectives: We aimed to study the association between incident myocardial infarction (MI) and VTE in a prospective population-based cohort. <p> Methods: Study participants (n=29 506) were recruited from three surveys of the Tromsø Study (conducted in 1994-95, 2001-02 ...