Predictors of Retention in a Clinical Trial of a Fentanyl Overdose Prevention Intervention: Implications for Supporting Participants’ Retention in Harm Reduction Research

Study results challenge stigmatizing beliefs about the impact of sociodemographic and drug use-related characteristics on retention in longitudinal research. Retention strategies that target men and people who sell drugs are needed. Investigators can collect multiple pieces of contact information, have monthly check-ins with participants, and partner with community organizations to make research more accessible and acceptable to structurally vulnerable populations.