The NorComt study is an ongoing, naturalistic, longitudinal study of individuals entering substance use disorder treatment in Norway. NorCOMT follows patients over time to collect data on their quality of life and substance use, as well as other factors impacting their treatment experience, including physical health, mental health, exercise habits, social environment, and exposure to criminal activity as victims or perpetrators. Patients also provide information about treatment interruptions or cessations, and their overall satisfaction with treatment.

24 participating institutions around the country have since 2013 invited all incoming patients, and the resulting sample is comprised of roughly 50% medication-free inpatients and 50% outpatients receiving opioid maintenance treatment. These patients are being followed up one year after intake. Concurrently, the same data is being collected from a sample of patients who have already received opioid maintenance treatment for three years or more.