Blar i forfatter "Stefansson, Vidar Tor Nyborg"

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    • Ambulatory blood pressure as risk factor for long-term kidney function decline in the general population: a distributional regression approach 

      Eriksen, Bjørn Odvar; Fasiolo, Matteo; Mathisen, Ulla Dorte; Jenssen, Trond; Stefansson, Vidar Tor Nyborg; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-31)
      The results of randomized controlled trials are unclear about the long-term efect of blood pressure (BP) on kidney function assessed as the glomerular fltration rate (GFR) in persons without chronic kidney disease or diabetes. The limited duration of follow-up and use of imprecise methods for assessing BP and GFR are important reasons why this issue has not been settled. Since a long-term randomized ...

    • The Association Between Metabolic Syndrome, Hyperfiltration, and Long-Term GFR Decline in the General Population 

      Bystad, Erikka Wikan; Stefansson, Vidar Tor Nyborg; Eriksen, Bjørn Odvar; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-01)
      Introduction: One-quarter of adults worldwide meet the criteria of metabolic syndrome (MetS). MetS increases the risk of diabetes, chronic kidney disease (CKD), and cardiovascular disease. However, the association between MetS, hyperfiltration, and long-term glomerular filtration rate (GFR) decline in the general population is unknown.<p> <p>Methods: In the Renal Iohexol Clearance Survey (RENIS), ...

    • Association of High-Density Lipoprotein Cholesterol With GFR Decline in a General Nondiabetic Population 

      Melsom, Toralf; Norvik, Jon Viljar; Enoksen, Inger Therese; Stefansson, Vidar Tor Nyborg; Rismo, Renathe; Jenssen, Trond; Solbu, Marit Dahl; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-18)
      <i>Introduction</i> - Although lower high-density lipoprotein cholesterol (HDL-C) levels are considered a risk factor for cardiovascular disease (CVD), experimental evidence suggest that aging, inflammation, and oxidative stress may remodel HDL-C, leading to dysfunctional HDL-C. Population studies on HDL-C and loss of the glomerular filtration rate (GFR) reported inconsistent results, but they used ...

    • Blood pressure and age-related GFR decline in the general population 

      Eriksen, Bjørn Odvar; Stefansson, Vidar Tor Nyborg; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Schei, Jørgen; Solbu, Marit Dahl; Wilsgaard, Tom; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-28)
      Background: <br> Hypertension is one of the most important causes of end-stage renal disease, but it is unclear whether elevated blood pressure (BP) also accelerates the gradual decline in the glomerular filtration rate (GFR) seen in the general population with increasing age. The reason may be that most studies have considered only baseline BP and not the effects of changes in BP, antihypertensive ...

    • Central obesity associates with renal hyperfiltration in the non-diabetic general population: a cross-sectional study 

      Stefansson, Vidar Tor Nyborg; Schei, Jørgen; Jenssen, Trond Geir; Melsom, Toralf; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-10)
      <p><i>Background - </i>Obesity is a risk factor for end-stage renal disease. Renal hyperfiltration, defined as an abnormally high glomerular filtration rate (GFR), is a link in the causal chain between diabetes and chronic kidney disease. Whether obesity is associated with hyperfiltration in the non-diabetic general population, remains unresolved due to a lack of consensus regarding the definition ...

    • Correlation between baseline GFR and subsequent change in GFR in Norwegian adults without diabetes and in Pima Indians 

      Melsom, Toralf; Nair, Viji; Schei, Jørgen; Mariani, Laura; Stefansson, Vidar Tor Nyborg; Harder, Jennifer L.; Jenssen, Trond Geir; Solbu, Marit Dahl; Norvik, Jon Viljar; Looker, Helen; Knowler, William C.; Kretzler, Matthias; Nelson, Robert G.; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-28)
      <p><i>Rationale & Objective - </i>An elevated glomerular filtration rate (GFR), or renal hyperfiltration, may predispose individuals to subsequent rapid GFR decline in diabetes, obesity, and metabolic syndrome. Although this hypothesis is supported by results of experimental studies, the importance of hyperfiltration at the population level remains controversial. We investigated whether higher ...

    • Elevated blood pressure is not associated with accelerated glomerular filtration rate decline in the general non-diabetic middle-aged population 

      Eriksen, Bjørn Odvar; Stefansson, Vidar Tor Nyborg; Jenssen, Trond Geir; Mathisen, Ulla Dorte; Schei, Jørgen; Solbu, Marit Dahl; Wilsgaard, Tom; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-14)
      Although hypertension is a risk factor for end-stage renal disease, this complication develops in only a minority of hypertensive patients. Whether non-malignant hypertension itself is sufficient to cause reduced glomerular filtration rate (GFR) is unclear. We investigated whether elevated blood pressure (BP) was associated with accelerated GFR decline in the general population. The study ...

    • 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 ...

    • Obesity, renal hyperfiltration and glomerular filtration rate decline in the general population 

      Stefansson, Vidar Tor Nyborg (Doctoral thesis; Doktorgradsavhandling, 2019-06-11)
      Obesity is a well-known risk factor for several severe diseases, including diabetes and cardiovascular disease. The metabolic syndrome is a concept related to obesity which includes additional risk factors for disease: increased waist circumference, high blood pressure, elevated fasting glucose, elevated triglycerides and lowered high-density lipoprotein cholesterol levels. Both obesity and the ...

    • 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 ...

    • Serum Matrix Metalloproteinase 7 and accelerated glomerular filtration rate decline in a general non-diabetic population 

      Enoksen, Inger Therese T.; Svistounov, Dmitri; Norvik, Jon Viljar; Stefansson, Vidar Tor Nyborg; Solbu, Marit Dahl; Eriksen, Bjørn Odvar; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-26)
      Background. Age-related reduction of glomerular filtration rate (GFR) is a major contributor to the global chronic kidney disease (CKD) epidemic. We investigated whether baseline serum levels of the pro-fibrotic matrix metalloproteinase 2 (MMP2), MMP7 and their inhibitor, tissue inhibitor of metalloproteinase 1 (TIMP1), which mediates fibrosis development in aging animals, were associated with ...

    • Sex Differences in Age-Related Loss of Kidney Function 

      Melsom, Toralf; Norvik, Jon Viljar; Enoksen, Inger Therese; Stefansson, Vidar Tor Nyborg; Mathisen, Ulla Dorte; Fuskevåg, Ole Martin; Jenssen, Trond Geir; Solbu, Marit Dahl; Eriksen, Bjørn Odvar (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-30)
      Background - CKD is more prevalent in women, but more men receive kidney replacement therapy for kidney failure. This apparent contradiction is not well understood.<p> <p>Methods - We investigated sex differences in the loss of kidney function and whether any sex disparities could be explained by comorbidity or CKD risk factors. In the Renal Iohexol Clearance Survey (RENIS) in northern Europe, ...

    • Urinary Markers of Oxidative Stress Are Associated With Albuminuria But Not GFR Decline 

      Schei, Jørgen; Fuskevåg, Ole-Martin; Stefansson, Vidar Tor Nyborg; Solbu, Marit Dahl; Jenssen, Trond Geir; Eriksen, Bjørn Odvar; Melsom, Toralf (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-07)
      <p><i>Introduction</i>: Markers of oxidative stress increase with age and are prevalent with chronic kidney disease. However, the role of oxidative stress markers as predictors for kidney function decline in the general population is unclear.</p> <p><i>Methods</i>: We investigated whether a baseline urinary excretion of oxidative DNA damage (8-oxo-7,8-dihydro-2′-deoxyguanosine [8-oxodG]) and ...