Frederick L. Altice

Introduction Stigma has undermined the scale‐up of evidence‐based HIV prevention and treatment. Negative beliefs influence clinicians’ discriminatory behaviour and ultimately have wide‐ranging effects across the HIV prevention and treatment continuum. Stigma among clinicians can be mitigated in several ways, including through interpersonal contact. In this study, we test whether interactions with people who inject drugs (PWID) influence attitudes of both direct and indirect providers of opioid agonist therapies (OATs) within the same primary care clinics (PCCs) where OAT is newly introduced. Methods In a cluster randomized controlled trial integrating OAT and HIV care into PCCs in Ukraine, clinicians at 24 integrated care sites (two sites in 12 regions) from January 2018 to August 2022 completed a structured survey at baseline, 12 and 24 months. The survey included feeling thermometers and standardized scales related to clinician attitudes towards patients and evidence‐based care. Nested linear mixed‐effects models were used to examine changes in mean scores over three timepoints for both direct and indirect clinicians. Results There were fewer significant changes in any of the scales for direct providers ( n = 87) than for indirect providers ( n = 155). Direct providers became less tough‐minded about substance use disorders ( p = 0.002), had less negative opinions about PWID ( p = 0.006) and improved their beliefs regarding OAT maintenance ( p <0.001) and medical information ( p = 0.004). Indirect providers reported improvements in most stigma constructs, including a significant decrease in prejudice ( p <0.001), discrimination ( p = 0.001), shame ( p = 0.007) and fear ( p = 0.001) towards PWID. Conclusions Integrating OAT services within primary settings was associated with significantly reduced stigma constructs and improved attitudes towards PWID, possibly through increased intergroup contact between PWID and general clinical staff. Unlike most stigma reduction interventions, re‐engineering clinical processes so that PWID receive their care in PCCs emerges as a multilevel stigma reduction intervention through the integration of specialized services in PCCs. Integration influences different types of stigma, and has positive effects not only on health outcomes, but also improves clinician attitudes and efficiently reduces clinician stigma.