Evaluating the sustainability of a cancer screening intervention through a PRISM: The PreView experience.

Although many trials of cancer screening interventions evaluate efficacy and effectiveness, less research focuses on how to sustain interventions in non-research settings, which limit the potential reach of these interventions. Identifying the factors that influence the potential for sustainability is critical. We evaluate the factors influencing sustainability of PreView, a Cancer Screening Intervention, within the context of the Practical, Robust Implementation and Sustainability Model (PRISM). PRISM includes organizational and patient perspectives of the intervention as well as characteristics of the organizational and patient recipients. It considers how the program or intervention design, external environment, implementation, and sustainability infrastructure and the recipients influence program adoption, implementation, and maintenance. We evaluate the attempts at sustainability of PreView within the constructs of PRISM. Encouraging patients to use PreView was more difficult outside of a clinical trial. Organizational perspectives on how the intervention fit in with other goals, patient perspectives on how the intervention is individualized (i.e. being able to choose which cancer screening to address) and focused on barriers, patient characteristics (i.e. having multiple comorbidities making cancer screening less of a priority), organizational characteristics (i.e. middle managers having competing responsibilities), external environment influences (i.e. reimbursement for achieving certain cancer screening goals), and sustainability infrastructure all affect the likelihood of PreView being sustained in clinical practice. Despite advance planning for sustainability, adapting interventions to achieve sustainability is difficult. Lessons learned from evaluating PreView within the PRISM model can inform future sustainability efforts.