• Establishing IMMULITE® 2000 cut-off values for serum allergen-specific immunoglobulin and exploring their relationship to exhaled nitric oxide 

      Evjenth, Bjørg; Hansen, Tonje Elisabeth; Brekke, Ole Lars; Holt, Jan (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-03-31)
      Aim: Paediatric cut-off values for serum allergen-specific IgE (sIgE) using the Siemens IMMULITE 2000 system to diagnose allergic rhinoconjunctivitis have not been established. We aimed to determine cut-off levels for sIgE for 10 common inhalant allergens and to study the relationship between sIgE, total IgE and fractional exhaled nitric oxide (FENO). <br>Methods: We enrolled 243 schoolchildren, ...
    • Increasing prevalence of asthma, allergic rhinoconjunctivitis and eczema among schoolchildren: three surveys during the period 1985-2008 

      Hansen, Tonje Elisabeth; Evjenth, Bjørg; Holt, Jan (Journal article; Tidsskriftartikkel; Peer reviewed, 2012-09-20)
      <p><i>Aim - </i>The prevalence of asthma, allergic rhinoconjunctivitis (AR) and eczema among children has increased worldwide in the last four decades, but recent studies disagree as to whether the prevalence is continuing to rise or is levelling off or declining. The aim of this study was to assess time trends in a subarctic population. <p><i>Methods - </i>A cross-sectional, questionnaire-based ...
    • Validation of a questionnaire against clinical assessment in the diagnosis of asthma in school children 

      Hansen, Tonje Elisabeth; Evjenth, Bjørg; Holt, Jan (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-10-08)
      <p><i>Aim: </i>A questionnaire has been used repeatedly in cross-sectional studies to determine the prevalence of asthma, allergic rhinoconjunctivitis (AR) and eczema among schoolchildren in Nordland County, Norway. The current study was designed to validate the questionnaire against clinical assessment as the diagnostic gold standard and to investigate the extent of possible misclassification. ...