Barriers and facilitators to the implementation of mentalization-based treatment (MBT) for borderline personality disorder.

There are several evidence-based treatments for borderline personality disorder, but very little is known about the success or failure of implementation in daily practice. This study aims to investigate the success or failure of newly started mentalization-based treatment programs, and to explore the barriers and facilitators. The implementation trajectories of seven different mentalization-based treatment programs in six mental health clinics in the Netherlands were included in a multiple case study combining a qualitative and quantitative design. Semi-structured interview data were collected from several stakeholders of each program. Narrative reconstructions of each interview were assessed by 12 independent experts. Results showed that several programs struggled to implement their program successfully, leading to discontinuation in three programs. According to the experts, particularly elements at the organizational level (i.e. organizational support) and team level (i.e. leadership) contributed to implementation outcome. These findings have important implications for the translation of guidelines and research findings in daily practice.