Medically assisted integrated rehabilitation program for people with opioid dependence: a quasi-experimental evaluation using multi-criteria decision analysis.

Background: Opioid use disorders constitute a vast disease burden, need for comprehensive treatment, and substantial costs to individuals, families, and society. The multifaceted needs of people with opioid dependence call for integrated care. The study aims to assess the added value of an integrated medically assisted rehabilitation (MAR) program providing opioid agonist therapy for patients with opioid dependence as compared to the standard of care (SoC) in Norway.

Methods: The intervention includes a comprehensive tertiary care integrated MAR program in Bergen. SoC is a much less intense primary care program in Oslo. 682 and 609 patients from Bergen, and 864 and 771 patients from Oslo were included in 2017 and 2019, respectively. A multi-criteria decision analysis (MCDA) framework was used where the relative preferences of the importance of the outcomes were obtained from a discrete choice experiment among five different stakeholder-groups. Seven outcomes related to health, well-being, experience of the care process, and cost were measured. The performance scores were measured in a study with a quasi-experimental design. Scores were analyzed using linear mixed methods. Performance scores for the outcomes were standardized and multiplied by their relative preferences to obtain the overall value scores in the MCDA.

Results: We found similar value scores for both care delivery models regarding physical functioning, psychological well-being, social relationships & participation, enjoyment of life, and total costs. The Bergen-model scored higher on continuity of care (0.733 versus 0.680), while the SoC-model scored higher on person-centeredness (0.772 versus 0.635). Overall value scores were marginally in favor of the MAR-Bergen (0.708 versus 0.705 for patients).

Conclusion: Acknowledging the significance of different life aspects emphasizes the need for integrated care at a specific level for people with opioid dependence. We conclude that the two highly effective treatment approaches produce promising outcomes in a challenging population and are quite similar. However, further research with more robust longitudinal data is needed.