Experiences of psychological interventions in neurodegenerative diseases: a systematic review and thematic synthesis.

Background: Psychological interventions for managing emotional distress in neurodegenerative diseases are needed, but progressive worsening of symptoms and increasing disability might pose difficulties with engagement. We aimed to synthesise the experiences of engaging with and using psychological interventions in neurodegenerative diseases and identify relevant barriers and facilitators. Methods: Systematic searches were conducted in six electronic databases and results were screened. We included qualitative and mixed methods studies reporting patient or caregivers' views or experiences of psychological interventions. Qualitative data were extracted and thematically synthesised. Results: 34 papers were included, covering a range of diseases and interventions. Engagement was facilitated by flexible intervention formats and tailoring to the specific needs of people with neurodegenerative diseases. Interventions were sometimes inaccessible or burdensome because of physical and cognitive symptoms, and the time and effort required for the intervention. Participants' levels of acceptance and readiness often differed and influenced engagement with the intervention. Across different interventions, participants experienced wide-ranging benefits including changes in insight, perspective, self-efficacy, emotions and relationships. Conclusion: Although people with neurodegenerative diseases and caregivers experience benefits from psychological interventions, burden-reducing adaptations and sensitive tailoring to the specific disease context is required to improve acceptability and engagement.