Centre for Alcohol and Drug Research

Opioid maintenance treatment in the Czech Republic, Norway and Denmark: a study protocol of a comparative registry linkage study

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  • Roman Gabrhelík, Charles Darwin Univ, Charles Darwin University, RIEL
  • ,
  • Marte Handal, Charles Darwin Univ, Charles Darwin University, RIEL
  • ,
  • Viktor Mravčík, Charles Darwin Univ, Charles Darwin University, RIEL
  • ,
  • Blanka Nechanská, Charles Darwin Univ, Charles Darwin University, RIEL
  • ,
  • Christian Tjagvad, Oslo University Hospital, National Advisory Unit on Late Effects after Cancer Treatment, Oslo University Hospital, Oslo, Norway; Cancer Registry of Norway, University of Oslo, Oslo, Norway; Faculty of Medicine, University of Oslo, Oslo, Norway. Electronic address: sdf@ous-hf.no.
  • ,
  • Birgitte Thylstrup
  • Morten Hesse
  • Jakub Minařík, Charles Darwin Univ, Charles Darwin University, RIEL
  • ,
  • Jiří Jarkovský, Charles Darwin Univ, Charles Darwin University, RIEL
  • ,
  • Anne Bukten, Oslo University Hospital, National Advisory Unit on Late Effects after Cancer Treatment, Oslo University Hospital, Oslo, Norway; Cancer Registry of Norway, University of Oslo, Oslo, Norway; Faculty of Medicine, University of Oslo, Oslo, Norway. Electronic address: sdf@ous-hf.no.
  • ,
  • Thomas Clausen, Oslo University Hospital, National Advisory Unit on Late Effects after Cancer Treatment, Oslo University Hospital, Oslo, Norway; Cancer Registry of Norway, University of Oslo, Oslo, Norway; Faculty of Medicine, University of Oslo, Oslo, Norway. Electronic address: sdf@ous-hf.no.
  • ,
  • Svetlana Skurtveit, Norwegian Institute of Public Health

INTRODUCTION: Opioid maintenance treatment (OMT) varies across settings and between countries. We plan to use data from several nationwide health and population registers to further improve the knowledge base established from earlier studies. Our aim is to study OMT adherence trajectories and to identify factors associated with improved outcomes for OMT patients across the Czech Republic, Norway and Denmark, in order to further improve OMT and our understanding of the key elements of treatment success.

METHODS AND ANALYSIS: The registry-based cohort approach across the three countries allows us to link data from a range of registers on the individual level, by using personal identifiers in nationwide cohorts of OMT and non-OMT patients and the general non-using populations. A total of ~21 500 OMT patients over the last two decades in all three countries will be included in the study. The following outcome variables (based on the International Classification of Diseases, 10th Revision codes) will be obtained from relevant registers: treatment adherence to OMT, comorbidity (somatic and mental health), and all-cause and cause-specific mortality. Outcomes of the country-specific analyses will be pooled.

ETHICS AND DISSEMINATION: The national OMT cohorts have been approved by the ethics committees in the respective countries. Data will be stored according to national and local guidelines and treated confidentially, and all data will be analysed separately for each country and compared across countries. Findings will be disseminated in peer-reviewed scientific journals, national and international conferences, and in briefings to inform clinical decision-making.

Original languageEnglish
Article numbere047028
JournalBMJ Open
Volume11
Issue5
Number of pages8
ISSN2044-6055
DOIs
Publication statusPublished - May 2021

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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