Recent additions

  • A Probabilistic Bag-to-Class Approach to Multiple-Instance Learning 

    Møllersen, Kajsa; Hardeberg, Jon Yngve; Godtliebsen, Fred (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-26)
    Multi-instance (MI) learning is a branch of machine learning, where each object (bag) consists of multiple feature vectors (instances)—for example, an image consisting of multiple patches and their corresponding feature vectors. In MI classification, each bag in the training set has a class label, but the instances are unlabeled. The instances are most commonly regarded as a set of points in a ...
  • The Northern Norway mother-and-child contaminant cohort study: implementation, population characteristics and summary of dietary findings 

    Veyhe, Anna Sofia; Hansen, Solrunn; Sandanger, Torkjel Manning; Nieboer, Evert; Odland, Jon Øyvind (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-05-28)
    <p><i>Objectives.</i> To describe the essential features of a new Northern Norway mother-and-child contaminant cohort study called MISA, including its rationale, content, implementation and selected findings (mostly dietary). <p><i>Study design. </i>Cross-sectional with longitudinal aspects. <p><i>Methods.</i> Five hundred and fifteen eligible women were enrolled in early pregnancy, with 391 ...
  • Measuring progress and projecting attainment on the basis of past trends of the health-related Sustainable Development Goals in 188 countries: an analysis from the Global Burden of Disease Study 2016 

    Fullman, Nancy; Barber, Ryan M.; Abajobir, Amanuel Alemu; Abate, Kalkidan Hassen; Abbafati, Cristiana; Abbas, Kaja M.; Abd-Allah, Foad; Abdulle, Abdishakur M.; Abera, Semaw Ferede; Aboyans, Victor; Abu-Raddad, Laith J.; Abu-Rmeileh, Niveen M. E.; Aryal, Krishna Kumar; Htet, Aung Soe; Kisa, Adnan; Norheim, Ole Frithjof; Vollset, Stein Emil; Weiderpass, Elisabete (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-12)
    <p><i>BACKGROUND: </i> The UN's Sustainable Development Goals (SDGs) are grounded in the global ambition of "leaving no one behind". Understanding today's gains and gaps for the health-related SDGs is essential for decision makers as they aim to improve the health of populations. As part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2016 (GBD 2016), we measured 37 of the 50 ...
  • Physical exercise and chronic pain in university students 

    Grasdalsmoen, Michael; Engdahl, Bo Lars; Fjeld, Mats Kirkeby; Steingrímsdóttir, Ólöf Anna; Nielsen, Christopher Sivert; Eriksen, Hege Randi; Lønning, Kari Jussie; Sivertsen, Børge (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-26)
    <i>Background</i> - Physical inactivity and chronic pain are both major public health concerns worldwide. Although the health benefits of regular physical exercise are well-documented, few large epidemiological studies have investigated the association between specific domains of physical exercise and chronic pain in young adults. We sought to investigate the association between frequency, intensity ...
  • Lifetime ultraviolet radiation exposure and DNA methylation in blood leukocytes: The Norwegian Women and Cancer Study 

    Page, Christian; Djordjilovic, Vera; Nøst, Therese Haugdahl; Ghiasvand, Reza; Sandanger, Torkjel M; Frigessi Di Rattalma, Arnoldo; Thoresen, Magne; Veierød, Marit Bragelien (Journal article; Tidsskriftartikkel, 2020-03-11)
    Ultraviolet radiation (UVR) exposure is a leading cause of skin cancers and an ubiquitous environmental exposure. However, the molecular mechanisms relating UVR exposure to melanoma is not fully understood. We aimed to investigate if lifetime UVR exposure could be robustly associated to DNA methylation (DNAm). We assessed DNAm in whole blood in three data sets (n = 183, 191, and 125) from the Norwegian ...
  • Periodontal health in an indigenous Sámi population in Northern Norway: A cross-sectional study 

    Bongo, Ann Kristine Sara; Brustad, Magritt; Oscarson, Nils; Jönsson, Birgitta (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-10)
    <i>Background</i> - The aim of the study was to describe prevalence, severity and distribution of periodontal disease as well as associated risk factors in an indigenous Sámi population in Northern Norway, and to investigate differences between the indigenous Sámi and the non-Sámi population.<p><p> <i>Methods</i> - This cross-sectional study included data from the Dental Health in the North study ...
  • Quality of family planning counseling in Ethiopia: Trends and determinants of information received by female modern contraceptive users, evidence from national survey data, (2014- 2018) 

    Hrusa, Gili; Spigt, Marcus; Dejene, Tariku; Shiferaw, Solomon (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-10)
    <p><i>Background - </i>Family planning counseling is critical for women to make informed reproductive and sexual health decisions. Despite Ethiopia's success in expanding access to family planning services, information on the quality of family planning counseling is limited. The objectives of this study were to assess whether the quality of counseling from the female client´s perspective has changed ...
  • Pharmacological management of modifiable cardiovascular risk factors (blood pressure and lipids) following diagnosis of myocardial infarction, stroke and diabetes: Comparison between population-based studies in Russia and Norway 

    Cook, Sarah Anne; Hopstock, Laila Arnesdatter; Eggen, Anne Elise; Bates, Katie; Iakunchykova, Olena; Kontsevaya, Anna; McKee, Martin; Schirmer, Henrik; Voevoda, Michael; Kudryavtsev, Alexander V; Malyutina, Sofia; Leon, David A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-19)
    <i>Background</i> - Cardiovascular disease (CVD) mortality is substantially higher in Russia than in neighbouring Norway. We aimed to compare blood pressure- and lipid-lowering medication use and proportion meeting treatment targets between general population samples in the two countries in those with CVD and diabetes.<p><p> <i>Methods</i> - The study population was adults aged 40–69 years reporting ...
  • Occupational Medicine and Environmental Health in the Border Areas of Euro-Arctic Barents Region: A Review of 30-Year Russian–Norwegian Research Collaboration Outcomes 

    Chashchin, Valery; Gorbanev, Sergei; Thomassen, Yngvar; Nieboer, Evert; Ellingsen, Dag; Syurin, Sergei; Nikanov, Alaksandr; Chashchin, Max; Odland, Jon Øyvind (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-30)
    This year marks 30 years of close collaboration between a consortium of institutions, namely, the Northwest Public Health Research Center, Saint-Petersburg (NWPHRC); the Institute of Community Medicine (ICM) of UiT (The Arctic University of Norway, Tromsø); the National Institute of Occupational Health (NIOH), Oslo; the University Hospital of Northern Norway (UNN) at Tromsø; and McMaster University ...
  • Uncontrolled and apparent treatment-resistant hypertension: a cross-sectional study of Russian and Norwegian 40–69 year olds 

    Petersen, Jakob; Malyutina, Sofia; Ryabikov, Andrey; Kontsevaya, Anna; Kudryavtsev, Alexander V; Eggen, Anne Elise; McKee, Martin; Cook, Sarah Anne; Hopstock, Laila Arnesdatter; Schirmer, Henrik; Leon, David Adrew (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-13)
    <i>Background</i> - Uncontrolled hypertension is a major cardiovascular risk factor. We examined uncontrolled hypertension and differences in treatment regimens between a high-risk country, Russia, and low-risk Norway to gain better understanding of the underlying factors.<p><p> <i>Methods</i> - Population-based survey data on 40–69 year olds with hypertension defined as taking antihypertensives ...
  • Relationships between metabolic markers and obesity measures in two populations that differ in stature - The SAMINOR Study 

    Michalsen, Vilde Lehne; Braaten, Tonje; Kvaløy, Kirsti; Melhus, Marita; Broderstad, Ann Ragnhild (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-03)
    <i>Background</i> - The relationships between metabolic markers and obesity measures may differ by ethnicity, sex, and height. Questions have been posed whether these relationships differ by ethnicity in the population in Northern Norway, but this has not been explored yet.<p><p> <i>Objectives</i> - Investigate the relationships between metabolic markers and obesity measures in Sami and non‐Sami ...
  • Associations between utilization rates and patients’ health: a study of spine surgery and patient-reported outcomes (EQ-5D and ODI) 

    Rudolfsen, Jan Håkon; Solberg, Tore; Ingebrigtsen, Tor; Olsen, Jan Abel (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-22)
    <i>Background</i> - A vast body of literature has documented regional variations in healthcare utilization rates. The extent to which such variations are “unwarranted” critically depends on whether there are corresponding variations in patients’ needs. Using a unique medical registry, the current paper investigated any associations between utilization rates and patients’ needs, as measured by two ...
  • Coronary heart disease and stroke in the Sami and non-Sami populations in rural Northern and Mid Norway - the SAMINOR Study 

    Siri, Susanna Ragnhild; Eliassen, Bent Martin; Broderstad, Ann Ragnhild; Melhus, Marita; Michalsen, Vilde Lehne; Jacobsen, Bjarne K.; Burchill, Luke; Braaten, Tonje (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-12)
    <i>Background</i> - Previous studies have suggested that Sami have a similar risk of myocardial infarction and a possible higher risk of stroke compared with non-Sami living in the same geographical area.<p><p> <i>Design</i> - Participants in the SAMINOR 1 Survey (2003–2004) aged 30 and 36–79 years were followed to the 31 December 2016 for observation of fatal or non-fatal events of acute ...
  • 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 ...
  • Are labor pain and birth experience associated with persistent pain and postpartum depression? A Prospective Cohort Study 

    Rosseland, Leiv Arne; Reme, Silje Endresen; Simonsen, Tone Breines; Thoresen, Magne; Nielsen, Christopher Sivert; Eberhard Gran, Malin (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-29)
    <i>Background and aims</i> - A considerable research-literature focuses on pain during labor and associations with postpartum persistent pain and depression, with findings pointing in various directions. The aim of this study was to examine the role of labor pain and overall birth experience in the development of pain and depression 8 weeks after delivery.<p><p> <i>Methods</i> - The study sample ...
  • Association between physical activity and risk of hepatobiliary cancers: A multinational cohort study 

    Baumeister, Sebastian E.; Schlesinger, Sabrina; Aleksandrova, Krasimira; Jochem, Carmen; Jenab, Mazda; Gunter, Marc J.; Overvad, Kim; Tjønneland, Anne; Boutron-Ruault, Marie-Christine; Carbonnel, Franck; Fournier, Agnès; Kühn, Tilman; Kaaks, Rudolf; Pischon, Tobias; Boeing, Heiner; Trichopoulou, Antonia; Bamia, Christina; La Vecchia, Carlo; Masala, Giovanna; Panico, Salvatore; Fasanelli, Francesca; Tumino, Rosario; Grioni, Sara; Bueno-de-Mesquita, Hendrik Bastiaan; Vermeulen, Roel; May, Anne M.; Borch, Kristin Benjaminsen; Oyeyemi, Sunday Oluwafemi; Ardanaz, Eva; Rodríguez-Barranco, Miguel; Chirlaque López, María Dolores; Felez-Nobrega, Mireia; Sonestedt, Emily; Ohlsson, Bodil; Hemmingsson, Oskar; Werner, Mårten; Perez-Cornago, Aurora; Ferrari, Pietro; Stepien, Magdalena; Freisling, Heinz; Tsilidis, Konstantinos K.; Ward, Heather; Riboli, Elio; Weiderpass, Elisabete; Leitzmann, Michael F. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-22)
    <i>Background & Aims</i> - To date, evidence on the association between physical activity and risk of hepatobiliary cancers has been inconclusive. We examined this association in the European Prospective Investigation into Cancer and Nutrition cohort (EPIC).<p><p> <i>Methods</i> - We identified 275 hepatocellular carcinoma (HCC) cases, 93 intrahepatic bile duct cancers (IHBCs), and 164 non-gallbladder ...
  • The use of spectrograms improves the classification of wheezes and crackles in an educational setting 

    Aviles Solis, Juan Carlos; Storvoll, Ingrid; Vanbelle, Sophie; Melbye, Hasse (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-21)
    Chest auscultation is a widely used method in the diagnosis of lung diseases. However, the interpretation of lung sounds is a subjective task and disagreements arise. New technological developments like the use of visSual representation of sounds through spectrograms could improve the agreement when classifying lung sounds, but this is not yet known. In this study, we tested if the use of spectrograms ...
  • Self-reported health as a predictor of mortality: A cohort study of its relation to other health measurements and observation time 

    Lorem, Geir; Cook, Sarah Anne; Leon, David A.; Emaus, Nina; Schirmer, Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-17)
    Self-reported health (SRH) is widely used as an epidemiological instrument given the changes in public health since its introduction in the 1980s. We examined the association between SRH and mortality and how this is affected by time and health measurements in a prospective cohort study using repeated measurements and physical examinations of 11652 men and 12684 women in Tromsø, Norway. We used Cox ...
  • Epidemiologisk atrieflimmerforskning i Tromsøundersøkelsen. Hva har vi lært? 

    Løchen, Maja-Lisa; Tiwari, Sweta (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
    Tromsøundersøkelsen er Norges lengste, mest omfattende og best besøkte epidemiologiske befolkningsundersøkelse gjennom mer enn 40 år. Forskningen har gitt oss viktig kunnskap om helse og sykdom og bidrar til bedre pasientbehandling, nasjonalt og internasjonalt. Atrieflimmerforskning har bidratt til ny kunnskap om utbredelse og risikofaktorer.
  • Maternal age and risk of cesarean section in women with induced labor at term—A Nordic register‐based study 

    Bergholt, Thomas; Skjeldestad, Finn Egil; Pyykönen, Aura; Rasmussen, Steen C.; Tapper, Anna-Maija; Bjarnadóttir, Ragnheiður I.; Smárason, Alexander; Másdóttir, Birna B.; Klungsøyr, Kari; Albrechtsen, Susanne; Källén, Karin; Gissler, Mika; Løkkegaard, Ellen (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-04)
    <p><i>Introduction - </i>Over the last decades, induction of labor has increased in many countries along with increasing maternal age. We assessed the effects of maternal age and labor induction on cesarean section at term among nulliparous and multiparous women without previous cesarean section. <p><i>Material and methods - </i>We performed a retrospective national registry‐based study from Denmark, ...

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