Malmö Treatment Referral and Intervention Study (MATRIS)-36-month follow-up on retention and substance use among patients referred from needle exchange to opioid agonist treatment-The role of stimulant use at baseline
INTRODUCTION: Opioid use disorder (OUD) is the leading cause of overdose morbidity and mortality globally. Retention in opioid agonist treatment (OAT) is crucial as it effectively reduces overdose mortality among individuals suffering from OUD. Previous research on treatment retention among heroin-dependent individuals referred from needle exchange programs (NEP) to OAT is scarce, and with predict