Geographic variation in the utilisation of specialist healthcare for patients with substance use disorders in Norway: a population-based registry study

Patient rates in SUD treatment fell every year between 2017-2021 and the geographic variation was high to extremely high. Treatment of substance use disorders in Norway may require stronger regional governance to reduce unwarranted variation and ensure equitable access to treatment. Substantial reductions in variation can be achieved by i) redistributing capacity among catchment areas, ii) purchasing fewer and shorter Inpatient stays and iii) increasing outpatient treatment. In addition, such means could dramatically increase patient rates. There is a need for more consistent clinical practices and adjusted capacity for treating specific substance diagnoses.