Background and aims: To enhance current pain rehabilitation programs with strategies to prevent relapse, we developed two interventions that facilitate the transfer of important treatment insights to the personal context of each individual patient. In this study, we explored (a) how patients and healthcare providers (HCPs) evaluate the form and content of these interventions (i.e. acceptability) and (b) how the interventions can be successfully implemented in existing treatment programs (i.e. implementation). 
Methods: We conducted a prospective feasibility study. For a period of 6 months, printed workbooks containing either one or both interventions were made available in two interdisciplinary rehabilitation programs. Subsequently, we collected data by means of a focus group and interviews. We used Braun and Clarke's (2006) step-by-step guide to analyze the dataset and adopted a deductive thematic content approach. 
Results: 18 patients and 4 HCPs were interviewed. All transcriptions were coded and organized by four themes, providing an in-depth account of stakeholder experiences related to acceptability of intervention form and content, as well as implementation in existing treatment programs. Among important findings were expectations that one intervention would be beneficial for patients, whereas the other intervention was more difficult to comprehend and required more therapist instructions. 
Conclusions: Overall, the interventions were perceived as useful, easy to use and in line with the treatment programs. Further testing should indicate if these interventions lead to a change in specific health behaviors and subsequently support long-term maintenance of therapy improvements for patients with chronic pain.

PREVENTING RELAPSE AFTER SUCCESSFUL INTERDISCIPLINARY REHABILITATION: A FEASIBILITY STUDY OF TWO PROTOTYPE INTERVENTIONS