• Plasma levels of growth differentiation factor 15 are associated with future risk of venous thromboembolism 

      Hansen, Ellen-Sofie; Hindberg, Kristian; Latysheva, Nadezhda; Aukrust, Pål; Ueland, Thor; Hansen, John-Bjarne; Brækkan, Sigrid Kufaas; Morelli, Vania Maris (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-15)
      Growth differentiation factor 15 (GDF-15), a marker of inflammation and oxidative stress, has emerged as a biomarker for arterial cardiovascular disease. However, the association between GDF-15 and venous thromboembolism (VTE) remains uncertain. We therefore investigated the association between plasma GDF-15 levels and future risk of incident VTE and explored the potential of a causal association ...
    • Plasma levels of leptin and risk of future incident venous thromboembolism 

      Frischmuth, Tobias; Hindberg, Kristian; Aukrust, Pål; Ueland, Thor; Brækkan, Sigrid K.; Hansen, John-Bjarne; Morelli, Vania Maris (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-11)
      Background - Circulating levels of leptin, an adipocyte-derived hormone, are frequently elevated in obesity. Leptin has been reported to upregulate prothrombotic hemostatic factors in vitro and could potentially mediate venous thromboembolism (VTE) risk in obesity. However, whether leptin is associated with VTE remains uncertain.<p> <p>Objective - This article investigates the association between ...
    • Plasma levels of von Willebrand factor and future risk of incident venous thromboembolism 

      Edvardsen, Magnus; Hindberg, Kristian; Hansen, Ellen-Sofie; Morelli, Vania Maris; Ueland, Thor; Aukrust, Pål; Brækkan, Sigrid Kufaas; Holtet Evensen, Line; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-07)
      Several case-control studies have reported elevated plasma von Willebrand factor (VWF) levels in patients with venous thromboembolism (VTE) compared with controls. However, because few studies have investigated the association in a prospective design, it is unclear whether elevated plasma VWF is a risk factor or a consequence of the VTE event. Therefore, we aimed to investigate the prospective ...
    • Platelet count and risk of major bleeding in venous thromboembolism 

      Johnsen, Håkon Sandbukt; Brækkan, Sigrid Kufaas; Morelli, Vania Maris; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-05)
      <p>The relationship between platelet count and risk of major bleeding in patients with venous thromboembolism (VTE) during anticoagulation remains unclear. We therefore investigated the association between platelet count, measured at VTE diagnosis and before the thrombotic event, and risk of major bleeding. Participants comprised 744 patients with incident VTE derived from the Tromsø Study. Major ...
    • Prothrombotic genotypes and risk of major bleeding in patients with incident venous thromboembolism 

      Johnsen, Håkon Sandbukt; Bjøri, Esben; Hindberg, Kristian; Brækkan, Sigrid Kufaas; Morelli, Vania Maris; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-22)
      <i>Background</i> - Genotypes associated with venous thromboembolism (VTE) may protect against bleeding due to a hypercoagulable state. Whether the risk of major bleeding is reduced in parallel with an increasing number of prothrombotic genotypes during anticoagulant treatment in VTE remains unknown.<p> <p><i>Objectives</i> - To investigate the association between multiple prothrombotic genotypes ...
    • Risk factors and predictors for venous thromboembolism in people with ischemic stroke: A systematic review 

      Tøndel, Birgitte Gladsø; Morelli, Vania Maris; Hansen, John Bjarne; Brækkan, Sigrid Kufaas (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-28)
      Identification of individuals with ischemic stroke at particularly high risk of venous thromboembolism (VTE) is crucial for targeted thromboprophylaxis. To guide clinical decision-making and development of risk prediction models, increased knowledge on risk factors and biomarkers is needed. Therefore, we set out to identify risk factors and predictors for VTE in people with ischemic stroke by ...
    • The Risk of Incident Venous Thromboembolism Attributed to Overweight and Obesity: The Tromso Study 

      Frischmuth, Tobias; Tøndel, Birgitte Gladsø; Brækkan, Sigrid Kufaas; Hansen, John Bjarne; Morelli, Vania Maris (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-07)
      Background: Obesity is a well-established risk factor for venous thromboembolism (VTE). However, data on the proportion of incident VTEs attributed to overweight and obesity in the general population are limited.<p> <p>Objective: To investigate the population attributable fraction (PAF) of VTE due to overweight and obesity in a population-based cohort with repeated measurements of body mass index ...
    • Role of microRNAs in venous thromboembolism 

      Morelli, Vania Maris; Brækkan, Sigrid Kufaas; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-09)
      MicroRNAs (miRNAs) are non-coding RNAs that execute their function by targeted downregulation of gene expressions. There is growing evidence from epidemiological studies and animal models suggesting that the expression level of miRNAs is dysregulated in venous thromboembolism (VTE). In this review, we summarize the current knowledge on the role of miRNAs as biomarkers for VTE and provide general ...
    • The Role of Stroke as a Trigger for Incident Venous Thromboembolism: Results from a Population-based Case-Crossover Study 

      Morelli, Vania Maris; Sejrup, Joakim Knutsen; Småbrekke, Birgit; Rinde, Ludvig B; Grimnes, Gro; Isaksen, Trond; Hansen, John-Bjarne; Hindberg, Kristian; Brækkan, Sigrid Kufaas (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-22)
      Stroke is associated with a short-term increased risk of subsequent venous thromboembolism (VTE). It is unclear to what extent this association is mediated by strokerelated complications that are potential triggers for VTE, such as immobilization and infection. We aimed to investigate the role of acute stroke as a trigger for incident VTE while taking other concomitant VTE triggers into account. ...
    • Surgery As a Trigger for Incident Venous Thromboembolism: Results from a Population-Based Case-Crossover Study 

      Meknas, Dana; Brækkan, Sigrid Kufaas; Hansen, John Bjarne; Morelli, Vania Maris (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-20)
      Background Surgery is a major transient risk factor for venous thromboembolism (VTE). However, the impact of major surgery as a VTE trigger has been scarcely investigated using a case-crossover design.<p> <p>Aim To investigate the role of major surgery as a trigger for incident VTE in a population-based case-crossover study while adjusting for other concomitant VTE triggers. <p>Methods We ...