Blar i forfatter "Karlstad, Øystein"

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    • Comorbidities in an asthma population 8-29 years old: a study from the Norwegian Prescription Database 

      Karlstad, Øystein; Nafstad, Per; Tverdal, Aage; Skurtveit, Svetlana; Furu, Kari (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-09-23)
      Purpose: To examine occurrence of chronic diseases and antimicrobial treatment in an asthma population 8-29 years old, compared to the general population. Methods: In this cross-sectional study, the asthma population was identified from the general population (retrieved from a census covering the entire Norwegian population) by using filled prescriptions on asthma drugs as a proxy measure of ...

    • Identification of potential carcinogenic and chemopreventive effects of prescription drugs: A protocol for a Norwegian registry-based study 

      Kulle, Bettina; Støer, Nathalie Charlotte; Martinsen, Jan Ivar; Ursin, Giske; Weiderpass, Elisabete; Thoresen, G. Hege; Debernard, Karen A. Boldingh; Karlstad, Øystein; Pottegard, Anton; Friis, Søren (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-08)
      <i>Introduction</i> - Surveillance of unintended effects of pharmaceuticals (pharmacovigilance or drug safety) is crucial, as knowledge of rare or late side effects is limited at the time of the introduction of new medications into the market. Side effects of drugs may involve increased or decreased risk of cancer, but these typically appear after a long induction period. This fact, together with ...

    • Is the Disease Burden from COPD in Norway Falling off? A Study of Time Trends in Three Different Data Sources 

      Melbye, Hasse; Helgeland, Jon; Karlstad, Øystein; Ariansen, Inger; Langhammer, Arnulf; Wisløff, Torbjørn; Nafstad, Per; Nystad, Wenche (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-12)
      <i>Background</i>: Less smoking should lead to fewer COPD cases. We aimed at estimating time trends in the prevalence and burden of COPD in Norway from 2001 to 2017.<p><p> <i>Methods</i>: We used pre-bronchodilator spirometry and other health data from persons aged 40– 84 years in three surveys of the Tromsø Study, 2001– 2002, 2007– 2008 and 2015– 2016. We applied spirometry lower limits of normal ...

    • National health registries – a ‘goldmine’ for studying non-communicable disease occurrence in Norway – the NCDNOR project 

      Nystad, Wenche; Hjellvik, Vidar; Larsen, Inger Kristin; Robsahm, Trude Eid; Sund, Erik Reidar; Krokstad, Steinar; Hopstock, Laila Arnesdatter; Grimsgaard, Anne Sameline; Langhammer, Arnulf; Bramness, Jørgen Gustav; Wisløff, Torbjørn; Lergenmuller, Simon; Dalene, Knut Eirik; Meyer, Haakon Eduard; Holvik, Kristin; Helgeland, Jon; Karlstad, Øystein; Ariansen, Inger (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-10)
      To estimate occurrence of non-communicable diseases (NCDs) over the life-course in the Norwegian population, national health registries are a vital source of information since they fully represent the entire non-institutionalised population. However, as they are mainly established for administrative purposes, more knowledge about how NCDs are recorded in the registries is needed. To establish this, ...

    • The Norwegian Society for Pharmacoepidemiology 

      Lupattelli, Angela; Karlstad, Øystein; Engeland, Anders; Småbrekke, Lars; Olsen, Kristine; Øvrebust, Aina; Waaseth, Marit (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-16)
      The Norwegian Society for Pharmacoepidemiology (NFFE) is a multidisciplinary, nation-wide network of professionals involved in the field of pharmacoepidemiology. Pharmacoepidemiology is the science that bridges epidemiologic methodology with clinical pharmacology and clinical pharmacy, for studying the use, effectiveness, value and safety of pharmaceuticals1 . The foundation of NFFE took into ...

    • Prescribing of drugs for attention-deficit hyperactivity disorder in opioid maintenance treatment patients in Norway 

      Karlstad, Øystein; Furu, Kari; Skurtveit, Svetlana; Selmer, Randi (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-09-27)
      Background: Attention-deficit hyperactivity disorder (ADHD) is a risk factor for development of substance use disorders. Treatment of ADHD with psychostimulants in patients on opioid maintenance treatment (OMT) has been restricted in Norway. We examined use of prescribed drugs for ADHD in OMT patients, and assessed co-medication with other psychotropics. Methods: Data were drawn from the nationwide ...