• Classification of bipolar disorder in psychiatric hospital : a prospective cohort study 

      Øiesvold, Terje; Nivison, Mary; Hansen, Vidje; Sørgaard, Knut; Østensen, Line; Skre, Ingunn (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Background This study has explored the classification of bipolar disorder in psychiatric hospital. A review of the literature reveals that there is a need for studies using stringent methodological approaches. Methods 480 first-time admitted patients to psychiatric hospital were found eligible and 271 of these gave written informed consent. The study sample was comprised of 250 patients (52%) ...
    • Diagnosing comorbidity in psychiatric hospital:challenging the validity of administrative registers 

      Øiesvold, Terje; Nivison, Mary; Hansen, Vidje; Skre, Ingunn; Østensen, Line; Sørgaard, Knut (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background This study will explore the validity of psychiatric diagnoses in administrative registers with special emphasis on comorbid anxiety and substance use disorders. Methods All new patients admitted to psychiatric hospital in northern Norway during one year were asked to participate. Of 477 patients found eligible, 272 gave their informed consent. 250 patients (52%) with hospital ...