Supplementary materials: Promoting community stakeholder engagement in research on treatment for pregnant women with opioid use disorder

<b>These are peer-reviewed supplementary materials for the article '</b><b>Promoting community stakeholder </b><b>engagement in research on treatment for </b><b>pregnant women with opioid use disorder</b><b>' published in the</b><b> </b><b><i>Journal of Comparative Effectiveness Research</i></b><b>.</b><b>Provider Stakeholder Survey: </b>In Preparation for Proposal Submission<b>Aim: </b>Community stakeholder engagement in research (CSER) can improve research relevance and efficiency as well as prevent harmful practices, particularly for vulnerable populations. Despite potential benefits, researchers lack familiarity with CSER methods. <b>Methods: </b>We describe CSER strategies used across the research continuum, including proposal development, study planning and the first years of a comparative effectiveness study of care for pregnant women with opioid use disorder. <b>Results: </b>We highlight successful strategies, grounded in principles of engagement, to establish and maintain stakeholder relationships, foster bidirectional communication and trust and support active participation of women with opioid use disorder in the research process. <b>Conclusion:</b> CSER methods support research with a disenfranchised population. Future work will evaluate the impact of CSER strategies on study outcomes and dissemination.