Patient Characteristics From Norway’s First Heroin-Assisted Treatment Clinics

Background: Heroin-assisted treatment (HAT) is an evidence-based treatment option for opioid use disorder (OUD), available in a limited number of countries. Norway implemented a 5-year HAT project in 2022, aiming to assess its effectiveness and its potential integration into the country’s OUD treatment system. This study describes and compares patients’ baseline characteristics from the Oslo and Bergen HAT clinics, providing a comprehensive picture of the unique population and the real-world application of HAT. Methods: This cross-sectional study examines the baseline characteristics of consenting HAT patients within the first 2 years of operation ( n = 86). Self-reported questionnaires gathered sociodemographics, previous treatment experiences, self-reported crime, and substance use, as well as motivations and expectations for treatment. Comparisons between the clinics were carried out using t -tests, Mann–Whitney U tests, Chi-square, and Fisher’s exact test. Results: The majority of the patients were enrolled at the Oslo clinic (76%) and were male (80%). At admission, the average age was 45.9, with a significantly younger group in Bergen (42.5 vs 47.3, P < .05). While no patients reported being unhoused, 17% noted unstable housing within the preceding month. Unemployment was prevalent (91%) alongside previous treatment experiences (95%), with a median of 2 prior medication types. In the 3 months preceding HAT initiation, 78% of patients reported being victims of crime, and 44% committed at least one crime. Over their lifetime, 2 in 5 participants (41%) had experienced an unwanted overdose and 43% had shared syringes and equipment. Conclusion: This study reveals a cohort experiencing societal marginalization, including unstable housing, unsatisfactory prior OUD treatment, high-risk behaviors, and frequent interactions with criminal activities, predominantly as victims. While the Oslo and Bergen clinics serve a similar patient profile, notable differences emerged in the reasons for discontinuing past OUD treatment and crime-related factors.