• Do More Recent Born Generations of Older Adults Have Stronger Grip? A Comparison of Three Cohorts of 66- to 84-Year-Olds in the Tromsø Study 

      Strand, Bjørn Heine; Bergland, Astrid; Jørgensen, Lone; Schirmer, Henrik; Emaus, Nina; Cooper, Rachel (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-11)
      <p><i>Background</i>: Evidence pertaining to whether more recent born generations of adults reaching old age have better physical capability than previous generations is scarce and inconclusive. We aimed to investigate birth cohort differences in grip strength.</p> <p><i>Methods</i>: The study comprised 5,595 individuals from the Tromsø study waves in 1994/1995, 2007/2008, and 2015/2016. Grip ...
    • Echocardiographic assessment of diastolic dysfunction in elderly patients with severe aortic stenosis before and after aortic valve replacement 

      Caglayan, Hatice Akay; Kjønås, Didrik; Malm, Siri; Schirmer, Henrik; Røsner, Assami (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-28)
      Background - The 2016 guidelines of the American Society of Echocardiography (ASE) and European Association of Cardiovascular Imaging (EACVI) for evaluation of left ventricular (LV) diastolic dysfunction by Doppler flow and tissue Doppler- echocardiography do not adjust assessment of high filling pressures for patients with aortic stenosis (AS). However, most of the studies on this patient group ...
    • The effect of blood pressure on cognitive performance. An 8-year follow-up of the Tromsø Study, comprising people aged 45–74 Years 

      Hestad, Knut; Engedal, Knut; Schirmer, Henrik; Strand, Bjørn Heine (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-21)
      <i>Background</i>: The relationship between blood pressure (BP) and cognition is complex were age appears to be an intervening variable. High and low BP have been associated with cognitive deficits as part of the aging process, but more studies are needed, especially in more recent birth cohorts.<p><p> <i>Methods</i>: The study sample comprised 4,465 participants, with BP measured at baseline in ...
    • 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 ...
    • Effects of Age and Sex on Estimated Diabetes Prevalence Using Different Diagnostic Criteria: The Tromso OGTT Study 

      Hutchinson, Moira Strand; Joakimsen, Ragnar Martin; Njølstad, Inger; Schirmer, Henrik; Figenschau, Yngve Anton; Svartberg, Johan; Jorde, Rolf (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Hb 6.5% has recently been recommended as an alternative diagnostic criterion for diabetes. The aims of the study were to evaluate the effects of age, sex, and other factors on prevalence of diabetes and to compare risk profiles of subjects with diabetes when defined by Hb and glucose criteria. Subjects were recruited among participants in the longitudinal population-based Tromsø Study. Hb , fasting ...
    • Employment status three years after percutaneous coronary intervention and predictors for being employed: A nationwide prospective cohort study 

      Olsen, Siv Jorunn Storli; Schirmer, Henrik; Wilsgaard, Tom; Bønaa, Kaare Harald; Hanssen, Tove Aminda (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-01)
      <i>Background</i> - Vocational support is recommended for patients in cardiac rehabilitation (CR), as returning to work is important in patients social readjusting after an acute coronary event. Information is lacking on whether CR leads to higher long-term employment after percutaneous coronary intervention (PCI).<p> <p><i>Aims</i> - The aims of this study were to determine employment status ...
    • Evidence for a direct harmful effect of alcohol on myocardial health: A large cross-sectional study of consumption patterns and cardiovascular disease risk biomarkers from northwest Russia, 2015 to 2017 

      Iakunchykova, Olena; Averina, Maria; Kudryavtsev, Alexander V; Wilsgaard, Tom; Soloviev, Andrey; Schirmer, Henrik; Cook, Sarah Anne; Leon, David Adrew (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-18)
      <i>Background</i> - Alcohol drinking is an increasingly recognized risk factor for cardiovascular disease. However, there are few studies of the impact of harmful and hazardous drinking on biomarkers of myocardial health. We conducted a study in Russia to investigate the impact of heavy drinking on biomarkers of cardiac damage and inflammation.<p><p> <i>Methods and Results</i> - The Know Your ...
    • External validation of a deep learning electrocardiogram algorithm to detect ventricular dysfunction 

      Attia, Itzhak Zachi; Tseng, Andrew S.; Benavente, Ernest Diez; Medina-Inojosa, Jose R.; Clark, Taane; Malyutina, Sofia; Kapa, Suraj; Schirmer, Henrik; Kudryavtsev, Alexander V; Noseworthy, Peter A.; Carter, Rickey E.; Ryabikov, Andrey; Perel, Pablo; Friedman, Paul A.; Leon, David A.; Lopez-Jimenez, Francisco (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-02)
      Objective - To validate a novel artificial-intelligence electrocardiogram algorithm (AI-ECG) to detect left ventricular systolic dysfunction (LVSD) in an external population.<p> <p>Background - LVSD, even when asymptomatic, confers increased morbidity and mortality. We recently derived AI-ECG to detect LVSD using ECGs based on a large sample of patients treated at the Mayo Clinic.<p> <p>Methods ...
    • 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 myocardial longitudinal strain in a general population—associations with blood pressure and subclinical heart failure: The Tromsø Study 

      Stylidis, Michael; Leon, David A.; Røsner, Assami; Schirmer, Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12-18)
      The early detection of subclinical myocardial dysfunction can contribute to the treatment and prevention of heart failure (HF). The aim of the study was to (i) describe myocardial global longitudinal strain (GLS) patterns in a large general population sample from Norway and their relation to established cardiovascular disease (CVD) risk factors; (ii) to determine its normal thresholds in healthy ...
    • Health Impact Index. Development and Validation of a Method for Classifying Comorbid Disease Measured against Self-Reported Health. 

      Lorem, Geir F; Schirmer, Henrik; Emaus, Nina (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-02-05)
      The objective of this study was to develop a method of classifying comorbid conditions that accounts for both the severity and joint effects of the diseases. The Tromsø Study is a cohort study with a longitudinal design utilizing a survey approach with physical examinations in the Tromsø municipality from 1974 to 2008, where in total 40051 subjects participated. We used Tromsø 4 as reference population ...
    • Healthcare professionals' knowledge of modifiable stroke risk factors: A cross-sectional questionnaire survey in greater Gaborone, Botswana 

      Ookeditse, Ookeditse; Motswakadikgwa, Thusego R.; Ookeditse, Kebadiretse K.; Masilo, Gosiame; Bogatsu, Yaone; Lekobe, Baleufi Calstro; Mosepele, Mosepele; Schirmer, Henrik; Johnsen, Stein Harald (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-27)
      Background - Stroke remains the second leading cause of deaths and disability globally, with highest mortality in Africa (low- and middle-income countries). It is crucial for healthcare professionals to have sufficient stroke risk factors' knowledge in order to reduce the stroke burden. <p> <p>Aims - We investigated healthcare professionals' knowledge of modifiable stroke risk factors, and ...
    • Heavy alcohol drinking and subclinical echocardiographic abnormalities of structure and function 

      Iakunchykova, Olena; Schirmer, Henrik; Leong, Darryl; Malyutina, Sofia; Ryabikov, Andrey; Averina, Maria; Kudryavtsev, Alexander V; Kornev, Mikhail; Voronina, Ekaterina; Paramonov, Andrey; Wilsgaard, Tom; Leon, David A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-02)
      Objective - The aim of the study is to assess changes in heart structure and function associated with heavy alcohol use by comparing echocardiographic indices in a population-based sample to those in patients admitted to an inpatient facility with severe alcohol problems.<p> <p>Methods and results - We used data from the Know Your Heart study (2015–2017) which is a cross-sectional study that ...
    • Hyperglycemia, Assessed by HbA1c, and Future Risk of Venous Thromboembolism - The Tromsø Study 

      Lerstad, Gunhild; Brodin, Ellen Elisabeth; Enga, Kristin; Jorde, Rolf; Schirmer, Henrik; Njølstad, Inger; Svartberg, Johan; Brækkan, Sigrid Kufaas; Hansen, John-Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-03-05)
      Background: Glycated hemoglobin (HbA1c), a marker of average plasma glucose during the last 8-12 weeks, is associated with future risk of cardiovascular disease (CVD) and all-cause mortality. Objectives: To examine the association between hyperglycemia, assessed by HbA1c, and future risk of VTE in a population based cohort. Methods: HbA1c was measured in 16 156 unique subjects (25-87 years) ...
    • Incidence of and risk factors for type-2 diabetes in a general population: The Tromso Study 

      Joseph, Josepha; Svartberg, Johan; Njølstad, Inger; Schirmer, Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
    • Incidence of dementia over a period of 20 years in a Norwegian population 

      Johnsen, Bente; Martinaityte, Ieva; Wilsgaard, Tom; Schirmer, Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-29)
      INTRODUCTION: In Norway, the prevalence of dementia is higher than in demographically comparable, high income countries, but reliable incidence studies are lacking. This study calculated the incidence of age-specific dementia from 2000 to 2019.<p> <p>METHODS: Participants from The Tromsø Study (n = 44,214) were included. Participants with a dementia diagnosis (n = 2049 cases) were identified. ...
    • The independent and joint associations of physical activity and body mass index with myocardial infarction: The Tromsø Study 

      Renninger, Marius; Løchen, Maja-Lisa; Ekelund, Ulf; Hopstock, Laila Arnesdatter; Jørgensen, Lone; Mathiesen, Ellisiv B.; Njølstad, Inger; Schirmer, Henrik; Wilsgaard, Tom; Morseth, Bente (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-13)
      Physical activity and overweight are associated with myocardial infarction (MI). However, their joint association with MI remains unclear. Our objective was to examine the independent and joint association between leisuretime physical activity (LTPA), body mass index (BMI) and MI. This prospective cohort study included 16,572 men and women (47.5% women) aged 20–54 years who took part in the second ...
    • Influence of hypertension on systolic and diastolic left ventricular function including segmental strain and strain rate 

      Kornev, Mikhail; Hatice, Akay Caglayan; Kudryavtsev, Alexander V; Malyutina, Sofia; Ryabikov, Andrew; Schirmer, Henrik; Rösner, Assami (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-22)
      Background - Left ventricular (LV) systolic and diastolic functions are important cardiovascular risk predictors in patients with hypertension. However, data on segmental, layer-specific strain, and diastolic strain rates in these patients are limited. The aim of this study was to investigate segmental two-dimensional strain rate imaging (SRI)-derived parameters to characterize LV systolic and ...
    • Interrater and intrarater agreement on heart murmurs 

      Andersen, Stian; Davidsen, Anne Herefoss; Schirmer, Henrik; Melbye, Hasse; Spigt, Marcus; Aviles Solis, Juan Carlos (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-04)
      Objective: To investigate interrater and intrarater agreement between physicians and medical students on heart sound classification from audio recordings, and factors predicting agreement with a reference classification.<p> <p>Design: Intra- and interrater agreement study. <p>Subjects: Seventeen GPs and eight cardiologists from Norway and the Netherlands, eight medical students from Norway. <p>Main ...