• Impaired Fasting Glucose Is Associated With Renal Hyperfiltration in the General Population 

      Melsom, Toralf; Mathisen, Ulla Dorte; Ingebretsen, Ole C; Jenssen, Trond Geir; Njølstad, Inger; Solbu, Marit Dahl; Toft, Ingrid; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Increased glomerular filtration rate (GFR), also called hyperfiltration, is a proposed mechanism for renal injury in diabetes. The causes of hyperfiltration in individuals without diabetes are largely unknown, including the possible role of borderline hyperglycemia. We assessed whether impaired fasting glucose (IFG; 5.6–6.9 mmol/L), elevated HbA1c, or hyperinsulinemia are associated with hyperfiltration ...
    • Incidence of and risk factors of chronic kidney disease: Results of a nationwide study in Iceland 

      Jonsson, Arnar J.; Lund, Sigrun H.; Eriksen, Bjørn Odvar; Palsson, Runolfur; Indridason, Olafur S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-25)
      Background - Information on the incidence of chronic kidney disease (CKD) in the general population is scarce. This study examined the incidence and risk factors of CKD stages 1–5 in Iceland, based on multiple markers of kidney damage.<p> <p>Methods - All serum creatinine (SCr) values, urine protein measurements and diagnosis codes for kidney diseases and comorbid conditions for people aged ≥18 ...
    • Iohexol plasma clearance for measuring glomerular filtration rate in clinical practice and research: a review. Part 2: Why to measure glomerular filtration rate with iohexol? 

      Delanaye, Pierre; Melsom, Toralf; Ebert, Natalie; Bäck, Sten-Erik; Mariat, Christophe; Cavalier, Etienne; Björk, Jonas; Christensson, Anders; Nyman, Ulf; Porrini, Esteban; Remuzzi, Giuseppe; Ruggenenti, Piero; Schaeffner, Elke; Soveri, Inga; Sterner, Gunnar; Eriksen, Bjørn Odvar; Gasperi, Flavia (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-09)
      A reliable assessment of glomerular filtration rate (GFR) is of paramount importance in clinical practice as well as epidemiological and clinical research settings. It is recommended by Kidney Disease: Improving Global Outcomes guidelines in specific populations (anorectic, cirrhotic, obese, renal and non-renal transplant patients) where estimation equations are unreliable. Measured GFR is the ...
    • Iohexol plasma clearance for measuring glomerular filtration rate in clinical practice and research: a review. Part 1: How to measure glomerular filtration rate with iohexol? 

      Delanaye, Pierre; Ebert, Natalie; Melsom, Toralf; Gasperi, Flavia; Mariat, Christophe; Cavalier, Etienne; Björk, Jonas; Christensson, Anders; Nyman, Ulf; Porrini, Esteban; Remuzzi, Giuseppe; Ruggenenti, Piero; Schaeffner, Elke; Soveri, Inga; Sterner, Gunnar; Eriksen, Bjørn Odvar; Bäck, Sten-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-23)
      While there is general agreement on the necessity tomeasure glomerular filtration rate (GFR) inmany clinical situations, there is less agreement on the bestmethod to achieve this purpose.As the gold standardmethod for GFR determination, urinary (or renal) clearance of inulin, fades into the background due to inconvenience and high cost, a diversity of filtrationmarkers and protocols compete to ...
    • Iohexol Plasma Clearance: Impact of Weighing the Syringe 

      Delanaye, Pierre; Melsom, Toralf; Cavalier, Etienne; Pottel, Hans; Eriksen, Bjørn Odvar; Dubourg, Laurence (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-05)
      Measured glomerular filtration rate (mGFR) measurement is necessary in specific patients and/or specific clinical contexts.1–3 Plasma clearances are the preferred methods, as they are less costly and cumbersome than urinary clearances.4 The contrast medium iohexol is the most commonly used worldwide, partly for pragmatic reasons, as this marker is stable, not radioactive, and its measurement ...
    • Low adiponectin is associated with diastolic dysfunction in women: A cross-sectional study from the Tromsø Study 

      Norvik, Jon Viljar; Schirmer, Henrik; Ytrehus, Kirsti; Jenssen, Trond Geir; Zykova, Svetlana; Eggen, Anne Elise; Eriksen, Bjørn Odvar; Solbu, Marit Dahl (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-03-14)
      Background: Heart failure with preserved ejection fraction is closely associated with diastolic dysfunction and related to obesity and female sex. We investigated whether adiponectin, an adipocyte-secreted protein hormone with cardioprotective effects, was associated with indices of diastolic dysfunction, and whether the association was sex dependent. <br>Methods: We conducted a cross-sectional ...
    • Low-grade impairments in cognitive and kidney function in a healthy middle-aged general population: a cross-sectional study 

      Småbrekke, Silje; Schirmer, Henrik; Melsom, Toralf; Solbu, Marit Dahl; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-05-14)
      <p><i>Background - </i>Although the relationship between manifest chronic kidney disease and reduced cognitive function is well established, limited data exists on GFR and cognitive function in the general population. Both the brain and kidneys have low-impedance vascular beds, rendering them susceptible to damage from pulsatile blood flow. An association between mildly reduced GFR and cognitive ...
    • Low-grade impairments in cognitive and kidney function in a healthy middle-aged general population: a cross-sectional study 

      Småbrekke, Silje; Schirmer, Henrik; Melsom, Toralf; Solbu, Marit Dahl; Eriksen, Bjørn Odvar (Master thesis; Mastergradsoppgave, 2019-10-28)
      Background: Although the relationship between manifest chronic kidney disease and reduced cognitive function is well established, limited data exists on GFR and cognitive function in the general population. Both the brain and kidneys have low-impedance vascular beds, rendering them susceptible to damage from pulsatile blood flow. An association between mildly reduced GFR and cognitive function in ...
    • Mild Albuminuria Is a Risk Factor for Faster GFR Decline in the Nondiabetic Population 

      Melsom, Toralf; Solbu, Marit Dahl; Schei, Jørgen; Stefansson, Vidar Tor Nyborg; Norvik, Jon Viljar; Jenssen, Trond Geir; Wilsgaard, Tom; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-08)
      <i>Introduction</i>: A minimal increase in the albumin-to-creatinine ratio (ACR) predicts cardiovascular disease and mortality, but whether it predicts kidney function loss in nondiabetic persons is unclear. We investigated the association between ACR in the optimal or high-normal range and the rate of glomerular filtration rate (GFR) decline in a cohort from the general population without diabetes, ...
    • Molecular programs associated with glomerular hyperfiltration in early diabetic kidney disease 

      Stefansson, Vidar Tor Nyborg; Nair, Viji; Melsom, Toralf; Looker, Helen C.; Mariani, Laura H.; Fermin, Damian; Eichinger, Felix; Menon, Rajasree; Subramanian, Lalita; Ladd, Patricia; Harned, Roger; Harder, Jennifer L.; Hodgin, Jeffrey B.; Bjornstad, Petter; Nelson, Peter J.; Eriksen, Bjørn Odvar; Nelson, Robert G.; Kretzler, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-31)
      Hyperfiltration is a state of high glomerular filtration rate (GFR) observed in early diabetes that damages glomeruli, resulting in an iterative process of increasing filtration load on fewer and fewer remaining functional glomeruli. To delineate underlying cellular mechanisms of damage associated with hyperfiltration, transcriptional profiles of kidney biopsies from Pima Indians with type 2 ...
    • N-Acetyl-β-D-Glucosaminidase Does Not Enhance Prediction of Cardiovascular or All-Cause Mortality by Albuminuria in a Low-Risk Population 

      Toft, Ingrid; Løchen, Maja-Lisa; Mathiesen, Ellisiv B.; Eriksen, Bjørn Odvar; Melsom, Toralf; Njølstad, Inger; Wilsgaard, Tom; Jenssen, Trond Geir (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-05)
      Albuminuria is a well known risk factor for cardiovascular disease and mortality, but focus on renal tubular dysfunction as a potential risk factor is growing also. The association between the urinary activity of N-acetyl-β-D-glucosaminidase (NAG) and cardiovascular risk has been assessed mostly in cross-sectional studies. We studied the cross-sectional associations between urinary NAG and cardiovascular ...
    • Nitric Oxide Precursors and Dimethylarginines as Risk Markers for Accelerated Measured GFR Decline in the General Population 

      Rinde, Nikoline Balteskard; Enoksen, Inger Therese Tønsberg; Melsom, Toralf; Fuskevåg, Ole Martin; Eriksen, Bjørn Odvar; Norvik, Jon Viljar Porserud (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-19)
      Introduction: Nitric oxide (NO) deficiency is associated with endothelial dysfunction, hypertension, atherosclerosis, and chronic kidney disease (CKD). Reduced NO bioavailability is hypothesized to play a vital role in kidney function impairment and CKD. We investigated the association of serum levels of endogenous inhibitors of NO, asymmetric dimethylarginine (ADMA) and symmetric dimethylargin ...
    • No decline in drug overdose deaths in Norway: An ecological approach to understanding at-risk groups and the impact of interventions 

      Amundsen, Ellen Johanna; Melsom, Anne-Karine Markeng; Eriksen, Bjørn Odvar; Løchen, Maja-Lisa (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-28)
      Aim: This Norwegian case study examines groups at risk of drug overdose deaths, evidencebased harm reduction interventions, low-threshold services and treatment implemented, as well as trends in drug overdose deaths between 2010 and 2021. We aimed to explore the relevance of interventions for at-risk groups and discuss their potential impact on drug overdose trends. Method/data: Using an ecological ...
    • Overweight modifies the longitudinal association between uric acid and some components of the metabolic syndrome: The Tromsø Study 

      Norvik, Jon Viljar; Storhaug, Hilde-Merete; Ytrehus, Kirsti; Jenssen, Trond Geir; Zykova, Svetlana; Eriksen, Bjørn Odvar; Solbu, Marit Dahl (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-10)
      Background: Elevated uric acid (UA) is associated with the presence of the metabolic syndrome (MetS). In a prospective cohort study, we assessed whether baseline and longitudinal change in UA were risk factors for development of MetS and its individual components. <br> Methods: We included 3087 women and 2996 men who had UA measured in the population based Tromsø Study 1994–95. The participants ...
    • Performance of creatinine-based equations to estimate glomerular filtration rate in White and Black populations in Europe, Brazil and Africa 

      Delanaye, Pierre; Vidal-Petiot, Emmanuelle; Björk, Jonas; Ebert, Natalie; Eriksen, Bjørn Odvar; Dubourg, Laurence; Grubb, Anders; Hansson, Magnus; Littmann, Karin; Mariat, Christophe; Melsom, Toralf; Schaeffner, Elke; Sundin, Per-Ola; Bökenkamp, Arend; Berg, Ulla B.; Åsling-Monemi, Kajsa; Åkesson, Anna; Larsson, Anders; Cavalier, Etienne; Dalton, R Neil; Courbebaisse, Marie; Couzi, Lionel; Gaillard, Francois; Garrouste, Cyril; Jacquemont, Lola; Kamar, Nassim; Legendre, Christophe; Rostaing, Lionel; Stehlé, Thomas; Haymann, Jean-Philippe; Selistre, Luciano da Silva; Strogoff-de-Matos, Jorge P.; Bukabau, Justine B.; Sumaili, Ernest K.; Yayo, Eric; Monnet, Dagui; Nyman, Ulf; Pottel, Hans; Flamant, Martin (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-24)
      Background - A new Chronic Kidney Disease Epidemiology Collaboration equation without the race variable has been recently proposed (CKD-EPIAS). This equation has neither been validated outside USA nor compared with the new European Kidney Function Consortium (EKFC) and Lund-Malmö Revised (LMREV) equations, developed in European cohorts.<p> <p>Methods - Standardized creatinine and measured glomerular ...
    • Performance of creatinine-based equations to estimate glomerular filtration rate with a methodology adapted to the context of drug dosage adjustment 

      Delanaye, Pierre; Björk, Jonas; Courbebaisse, Marie; Couzi, Lionel; Ebert, Natalie; Eriksen, Bjørn Odvar; Dalton, R. Neil; Dubourg, Laurence; Melsom, Toralf; Nyman, Ulf (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-28)
      <p><i>Aim:</i> The Cockcroft-Gault (CG) creatinine-based equation is still used to estimate glomerular filtration rate (eGFR) for drug dosage adjustment. Incorrect eGFR may lead to hazardous over- or underdosing. <p><i>Methods:</i> In a cross-sectional analysis, CG was validated against measured GFR (mGFR) in 14 804 participants and compared with the Modification-of-Diet-in-Renal-Diseases (MDRD), ...
    • The potential for reducing inappropriate hospital admissions : a study of health benefits and costs in a department of internal medicine 

      Eriksen, Bjørn Odvar (Doctoral thesis; Doktorgradsavhandling, 1999)
      Inappropriate hospital admissions are defined as those which do not result in health benefit for the patient or in such benefit that could have been obtained on a lower care level. Studies from many parts of the world have reported high rates of such admissions. It is commonly believed that they represent a potential for significant cost reductions. However, this assumes that they can be identified ...
    • Prediabetes and Risk of Glomerular Hyperfiltration and Albuminuria in the General Nondiabetic Population: A Prospective Cohort Study 

      Melsom, Toralf; Schei, Jørgen; Stefansson, Vidar Tor Nyborg; Solbu, Marit Dahl; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Wilsgaard, Tom; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-29)
    • Prediabetes and Risk of Glomerular Hyperfiltration and Albuminuria in the General Nondiabetic Population: A Prospective Cohort Study 

      Melsom, Toralf; Schei, Jørgen; Stefansson, Vidar Tor Nyborg; Solbu, Marit Dahl; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Wilsgaard, Tom; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-12-29)
      Background: The role of prediabetes as a risk factor for hyperfiltration and albuminuria in persons who do not develop diabetes is unclear. The lack of evidence is mainly due to the difficulty of accurately assessing the glomerular filtration rate (GFR) in the near-normal range of GFR. We investigated whether prediabetes is an independent risk factor for glomerular hyperfiltration and high-normal ...
    • Regional differences in renal replacement therapy in northern Norway 2000-2012 

      Norum, Jan; Leivestad, Torbjørn; Eriksen, Bjørn Odvar; Skår, Siw; Fagerheim, Anne Kristine; Reisæter, Anna Varberg (Journal article; Tidsskriftartikkel, 2015-02-10)
      Objectives: Distance from residence location to a centre for renal replacement therapy (RRT) may influence patients’ quality of life and prognosis. Northern Norway constitutes 45% of Norway’s landmass, but has less than 10% of the population. <p>Methods: In this study, we analysed all patients in northern Norway consecutively registered in the Norwegian Renal Registry during 20002012. A total ...